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Seminar on Aspects of Quantum Matter Theory

Our group seminar takes place every Thursday at 14:00 in room 1.101. Each seminar is devoted to presenting our recent work as well as recent publications and developments in the fields of ultracold gases, quantum optics, quantum simulation and quantum many-body systems. Interested students are welcome to attend the seminar.


Please do not confuse our group seminar with the "Condensed Matter Theory Seminar", which is held each Friday at 15:00 in room 1.114.

 


Sommersemester 2017


No.DateSpeakerTopicRelevant links
1013/07/17Johannes Zeiher (Max-Planck-Institut für Quantenoptik, Garching, Germany),
Jaromir Panas,
Junhui Zheng
Seminar: Coherent many-body dynamics in Rydberg-dressed spin chains
Status report: development of Lindblad-DMFT project
Status report: tba
abstract
notes
notes
906/07/17Mohsen Hafez-Torbati,
Tao Qin,
Mathieu Barbier
Status report: C++ template library for real-space DMFT (continued)
Status report: High frequency expansion, schrieffer-Wolff transformation and Floquet DMFT in time-periodically driven systems
Journal Club: Bistability vs. metastability in driven dissipative Rydberg gases
slides
slides
abstract
829/06/17Kirill Plekhanov (Ecole Polytechnique, Paris),
Mohsen Hafez-Torbati
Seminar: Emergent chiral spin state in the Mott phase of a bosonic Kane-Mele-Hubbard model
Status report: C++ template library for real-space DMFT
abstract
slides
708/06/17Arya Dhar,
Jaromir Panas,
Junhui Zheng
Status report: Bosonic dynamics in the projection operator approach
Journal club: Thermoelectric properties of a strongly correlated layer
Journal club: Exploring 4D Quantum Hall Physics with a 2D Topological Charge Pump
notes
abstract(annotated)
abstract(annotated)
601/06/17Mohsen Hafez-Torbati,
Tao Qin,
Andreas Geißler
Journal club: Topological Mott Insulators (continued)
Review: From Static to Dynamcial Gauge Fields with Ultracold Atoms (Florence)
Status report: Spectral functions in systems with long-range interactions and the Hartree approximation
abstract
slides
notes
518/05/17Ulf Bissbort (Singapore University of Technology and Design),
Mohsen Hafez-Torbati
Seminar: Minimalistic quantum motors: Studying particle and energy transport from the bottom up
Journal club: Topological Mott Insulators
abstract
abstract(annotated)
411/05/17Jaromir Panas,
Tao Qin
Journal club: Observation of pendular butterfly Rydberg molecules
Journal club: Measuring the Second Chern Number from Nonadiabatic Effects
abstract(annotated)
abstract(notes)
304/05/17Ayra Dhar,
Andreas Geißler
Journal club: Revealing Hidden Antiferromagnetic Correlations in Doped Hubbard Chains via String Correlators
Journal club: Multi-speed prethermalization in spin models with power-law decaying interactions
abstract(annotated)
abstract(annotated)
227/04/17Bernhard Irsigler,
Mathieu Barbier
Status report: Interacting Topological Insulator in Cold Atom Setup
Status report: Summary of research in Japan and observed dynamics in a Rydberg dressed system
slides
slides
120/04/17Tao Qin,
Junhui Zheng 
Status report: Non-thermalized steady states and resonant tunneling in interacting, time-periodically driven systems
Status report: Topological index and IPT solver
slides
notes

 


Wintersemeseter 2016/17


No.DateSpeakerTopicRelevant links
1309/02/17Andreas GeißlerStatus report: Bosonic quasi-particle modes in two component Rydberg lattice gasesnotes
1202/02/17Arya Dhar,
Tao Qin
Status report: Two-sided Lanczos and Arnoldi Time evolution
Journal club: Realization of two-dimensional spin-orbit coupling for Bose-Einstein condensates
notes
abstract(notes)
1126/01/17Tao Qin,
Arya Dhar
Status report: Spectral functions in a time-periodically driven Falicov-Kimball model and future directions
Journal club: Spin-Orbit Coupling and Spin Textures in Optical Superlattices
notes
abstract
1019/01/17Andreas Geißler,
Junhui Zheng
Journal club: Quantum phase transitions with parity-symmetry breaking and hysteresis
Status report: Topological Insulator with Disorder and Interaction
abstract
notes
912/01/17Dandan Su,
Tom Olsen
Journal club: Supersolid formation in a quantum gas breaking continuous translational symmetry
Journal club: Floquet time crystals
abstract
abstract(link)
815/12/16Dandan Su,
Tao Qin
Status report: on Wannier Functions
Journal club: Exploring the many-body localization transition in two dimensions
notes
abstract(notes)
708/12/16Arya Dhar,
Dandan Su
Status report:
Journal club: A Superradiant Topological Peierls Insulator inside an Optical Cavity

abstract(highlighted)
601/12/16Junhui Zheng,
Dandan Su

Status report: Topological insulator with disorder
Journal club: A Superradiant Topological Peierls Insulator inside an Optical Cavity

slides(notes)
abstract
524/11/16Ana Hudomal (University of Belgrade),
Andreas Geißler
Transport dynamics in optical lattices with flux
Journal club: Solving the Quantum Many-Body Problem with Artificial Neural Networks

abstract(highlighted)
417/11/16Vladimir Veljic (University of Belgrade),
Arya Dhar
Dynamics of Trapped Dipolar Fermi Gases: From Collisionless to Hydrodynamic Regime
Journal club: Site resolved imaging of single atoms with a Faraday quantum gas microscope

abstract
303/11/16Tao Qin,
Junhui Zheng
Status report: Calculations of spectral functions of time-periodically driven system
Journal club: Dynamical preparation of Floquet Chern insulators
slides
abstract(highlighted)
227/10/16Andreas Geißler,
Arya Dhar
Status report: The coherent tail state and two of its applications
Status report: Lindblad-DMFT for Rydberg dressed lattice systems
abstract
slides
120/10/16QMT group,
Tao Qin
Conference review: Glasgow (Dandan), Aachen (Tao Qin), Ercolano (Arya) and Greifswald (Andreas)
Journal Club: Dynamical topological phase transition
slides,slides,NLPE@JSC
abstract(highlighted),
notes

 


Sommersemester 2016


No.DateSpeakerTopicRelevant links
1228/07/16Philipp Fabritius (Universität Heidelberg)On the spinless Fermion ladder with Rydberg atoms
1114/07/16Bernhard Irsigler (Freie Universität Berlin)Dimensional Phase Transition in an Ultracold Bose Gasabstract
1007/07/16Rajbir Nirwan,
Mathieu Barbier,
Arya Dhar,
Pramod Kumar
Machine Learning and the Titanic - Analysing the Titanic Dataset to predict survival of the passengers (cont.)
Status report: Stability of corrected Rydberg phases
Status report: Lindblad, DMFT and the super-fermion representation
Status report: tba
slides
slides
notes

930/06/16Dandan Su,
Anna Golubeva,
Rajbir Nirwan
Status report: Interacting Bosons in an optical cavity
Status report: Symmetry breaking in an SU(4)-symmetric system
Machine Learning and the Titanic - Analysing the Titanic Dataset to predict survival of the passengers
slides
abstract
slides
823/06/16Tao Qin,
Arya Dhar,
Pramod Kumar
Status report: Energy dissipation and work in the time-periodically driven single-band Hubbard model
Journal Club: Observation of 2D Fermionic Mott Insulators of K40 with Single-Site Resolution
Journal Club: Phase transitions of the ionic Hubbard model on the honeycomb lattice
notes
abstract
abstract
716/06/16Arya Dhar,
Mathieu Barbier,
Dandan Su
Effects of spin and mass imbalance in extended Bose-Hubbard Model
Status report: correction of phase diagram and first results of dynamics
Journal Club: Ultracold Bosons with cavity-mediated long-range interactions: A local mean field analysis of the phase diagram
slides
slides
abstract
609/06/16Tao Qin,

Tao Yin,

Andreas Geißler
Journal Club: Prethermal Floquet Steady States and Instabilities in the Periodically Driven, Weakly Interacting Bose-Hubbard Model
Journal Club: Floquet Engineering of Correlated Tunneling in the Bose-Hubbard Model with Ultracold Atoms
Status report: Quasiparticle-theory in multicomponent systems with Rabi- and long-range-coupling
abstract(highlighted),
slides,supplementary
abstract(highlighted),
slides
notes
502/06/16Anna Golubeva,
Pramod Kumar
Status report: Master thesis
Status report: Continuous time QMC
notes
slides
419/05/16Ivana Vasic (University of Belgrade),
Andreas Geißler
Excitation spectra of a Bose-Einstein condensate with an angular spin-orbit coupling
Status report: The bosonic cutoff problem - the case of effective Anderson impurity models

abstract
notes

312/05/16Thomas Mertz,
Tao Yin
Journal Club: Topological Edge States with Zero Hall Conductivity in a Dimerized Hofstadter Model
Status report: Interacting polarons in Bose-Fermi Mixtures
abstract
slides
228/04/16Mathieu Barbier,
Tao Qin
Journal Club: Many-body interferometry of a Rydberg-dressed spin lattice
Status report: Violation of fluctuation-dissipation theorem and heating in time-periodically-driven Hubbard model
abstract
slides
114/04/16Thomas MertzTopological Band Theoryslides

 

Wintersemester 2015/16

 

No.DateSpeakerTopicRelevant links
1411/02/16Pramod Kumar
Agnieszka Cichy
Status report: Interaction induced topological & magnetic phases in the Hofstadter-Hubbard model
Status report: Orbital magnetism in ultracold Ferminoic gases in a lattice - Dynamical mean-field approach
notes
notes(RDMFT data)
1304/02/16Andreas Geißler
Mathieu Barbier
Status report: Rydberg dressed systems in the Hartree-Fock-approximation and Bogoliubov theory
Status report: Dissipative dynamics in Rydberg dressed systems
notes
slides
1228/01/16Tao Yin
Rajbir Nirwan
Status report: Heating and decoherence effects in a hybrid atom-ion system (cont.)
Status report: Numerical results for Kane-Mele model
slides
notes
1121/01/16Tao Qin

Tao Yin
Status report: Application of Floquet-DMFT to the single-band Hubbard model:
Density of states and optical Hall conductivity
Status report: Heating and decoherence effects in a hybrid atom-ion system
slides

slides
1014/01/16Karla Baumann
Mathieu Barbier
Rajbir Nirwan
Status report: Dynamical mean-field theory for polarons
Status report: First steps into dynamics
Journal Club: Twisted complex superfluids in optical lattices

slides
abstract
917/12/15Anna Golubeva
Dandan Su
Andreas Geißler
Status report: SU(4) symmetry of alkaline-earth like atoms in an optical lattice
Journal Club: Quantum phases emerging from competing short- and long-range interactions in an optical lattice
Status report: Rydberg dressed systems close to unit filling
slides
abstract
notes
810/12/15Andreas Geißler

P. Kumar, T. Mertz, R. Nirwan
P. Kumar, T. Mertz
Agnieszka Cichy
Journal Club: On the adiabatic preparation of spatially-ordered Rydberg excitations
of atoms in a one-dimensional optical lattice by laser frequency sweeps
Research summary on artificial gauge fields
Hartree-Fock versus DMFT within topological Hamiltonian
Journal Club: Observation of the Berezinskii-Kosterlitz-Thouless Phase Transition in an Ultracold Fermi Gas
abstract(highlighted)

notes
abstract(highlighted)
slides;more
726/11/15Tao Yin
Karla Baumann
Status Report: Interacting Polarons in Bose-Fermi Mixtures: Mean-Field Studies
Journal Club: Nonequilibrium Dynamical Mean-Field Theory for Bosonic Lattice Models
slides
abstract;slides
619/11/15Tao Qin
Pramod Kumar
Mathieu Barbier
Journal Club: Experimental reconstruction of Wilson lines in Bloch bands (2/2)
on quantum point contacts and time-of-flight measurements
Journal Club: Dynamical phases in a one-dimensional chain of Heterospecies Rydberg atoms with next-nearest neighbor interactions
abstract;notes
notes
abstract(highlighted)
512/11/15Dandan Su
Pramod Kumar
Tao Qin
Status Report: Interacting bosons in an optical cavity
Chern number revisited
Journal Club: Experimental reconstruction of Wilson lines in Bloch bands (1/2)
slides

abstract;notes
405/11/15Pramod KumarJournal Club: Experimental reconstruction of the Berry curvature in a topological Bloch bandabstract;slides
whiteboard
329/10/15Tao Yin

Pramod Kumar
Journal Club: Decoherence of Impurities in a Fermi Sea of Ultracold Atoms /
Metastability and coherence of repulsive polarons in a strongly interacting Fermi mixture
Status Report
abstract/
abstract;slides
slides
222/10/15Agnieszka Cichy
K. Baumann & M. Barbier
Rajbir Nirwan
Orbital Magnetism in Ultracold Fermionic Gases on the Lattice: Dynamical Mean-Field Approach
Review of summer school "Quantum Matter - Out of Equilibrium" in Granada Sep. 14-17
Review of SFB/TR49 student seminar in Cologne Oct. 7-9
slides


115/10/15Tao Qin
Agnieszka Cichy
Floquet DMFT and its application to the single-band Hubbard model
Journal Club: Exploring competing density order in the ionic Hubbard model with ultracold fermions
slides
abstract;slides

 

Sommersemester 2015

 

No.DateSpeakerTopicRelevant links
1016/07/15Dandan Su
Anna Golubeva
Agnieszka Cichy
The POLATOM meeting: short overview
A short presentation on the Les Houches summer school 
Journal Club: Finite temperature stability and dimensional crossover of exotic superfluidity in lattices
slides
slides
abstract(highlighted)
909/07/15Karla Baumann
Mathieu Barbier
Journal Club: Black hole as a critical point of quantum phase transition
Brief review of the iCoRD
abstract;slides
slides
802/07/15Tao YinJournal Club: Tunable Spin-Orbit Coupling via Driving in Ultracold-Atom Systemsabstract(highlighted)
725/06/15Dominik Juraschek,
Uni Augsburg
Spin and Charge Density Fluctuations in Multiorbital Impurity Modelsabstract
618/06/15Arya DharTopics on Ultracold gases in different lattice geometriesabstract
511/06/15Walter HofstetterQuasiparticle excitations and dissipative dynamics of strongly correlated bosonsabstract
428/05/15Andreas GeißlerJournal Club: Quantum Simulation of Energy Transport with Embedded Rydberg Aggregates / 
Correlated Exciton Transport in Rydberg-Dressed-Atom Spin Chains
abstract(highlighted)/
abstract(highlighted)
321/05/15Pramod KumarJournal Club: Correlation effects in two-dimensional topological insulatorsarXiv:1211.1774;
slides
230/04/15QMT GroupDPG Review (Heidelberg and Berlin)
116/04/15Tao QinJournal Club: Observation of many-body localization of interacting fermions in a quasi-random optical latticearXiv:1501.05661;
slides

 

Wintersemester 2014/15

 

No.DateSpeakerTopicRelevant links
1326/02/15Pramod KumarDynamical mean field theory - A reviewslides
1205/02/15Karla BaumannDynamics of few bosons in tilted lattices (Bachelor thesis)slides
1129/01/15Mathieu BarbierArising phases in Rydberg dressed systems via Gutzwiller Theory (Bachelor thesis)slides
1022/01/15Rajbir NirvanBEC in gauge fieldsslides
915/01/15Tao QinOrbital order and weak ferromagnetism in body-centered cubic A15-structured cesium fullerideslides
818/12/14Andrii SotnikovExact diagonalization solver in DMFT for multi-component fermionic mixturesslides
711/12/14Ulrike BornheimerPhase transitions in a coherently coupled bose gas in an optical latticeslides
602/12/14Agnieszka CichyJournal Club: Experimental realization of the topological Haldane model with ultracold fermionsarXiv:1406.7874;
slides
520/11/14Dandan SuInteracting bosons in an optical cavityslides
413/11/14Tao YinPolaronic effects in one and two bands quantum systemslides
306/11/14Agnieszka CichyWorkshop on Probing and Understanding Exotic Superconductors (ICTP, Trieste)slides
230/10/14Andreas GeißlerReview of both the 4th Les Houches School in computational physics: From quantum gases to
strongly correlated systems and the COHERENCE Workshop on ultracold Rydberg physics in Granada
slides
123/10/14Pramod KumarKondo-hole substitution in heavy fermionsslides

 

Sommersemester 2014

 

No.DateSpeakerTopicRelevant links
917/07/14Christian MünchJournal Club: Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetismarXiv:1403.2964;
803/07/14Ulrike BornheimerJournal Club: Half-integer Mott-insulator phase in the imbalanced honeycomb latticearXiv:1212.4570;

712/06/14

Ivana Vidanovic

Thomas Mertz

Relevant talks from DAMOP 2014

Journal Club: Controlling Discrete and Continuous Symmetries in "Superradiant" Phase Transitions with Circuit QED Systems

slides

arXiv:1310.3780;
slides

605/06/14Peer WederMagnetic phases of fermions in triangular optical latticesslides
522/05/14Rajbir Nirwan1) Journal Club: Theory of Bosons in two-leg ladders with large magnetic fields
2) Journal Club: Observation of the Meissner effect with ultra cold atoms inbosonic ladders
1) arXiv:1405.0230;
2) arXiv:1402.0819;
slides
415/05/14Mathieu BarbierJournal Club: Dynamical crystallization in a low-dimensional Rydberg gasarXiv:1404.0980;
slides
308/05/14Karla BaumannJournal Club: Phonon Dispersion Relation of an Atomic Bose-Einstein CondensatearXiv:1207.3440;
slides
224/04/14Tao YinJournal Club: Emergence of coherence and the dynamics of quantum phase transitionsarXiv:1403.7199;
slides
117/04/14

Christian Muench

Jonathan Enders

Journal Club: Microscopic observation of magnon bound states and their dynamics

Structuring C++ code and calculating Hubbard parameters for inhomogeneous lattices

arXiv:1305.6598;
slides

 

Wintersemester 2013/2014

 

No.DateSpeakerTopicRelevant links
1425/02/14Ulf BissbortAtomic-scale coherent spin imaging of protein structures using NV-centers in diamondabstract
1320/02/141) Andrii Sotnikov
2) Andreas Geißler
1) Presentation of the large-spin DMFT code based on the CT-HYB solver
2) Journal Club: Quasi-Particle Theory for the Higgs Amplitude Mode
1) slides
2) arXiv:1401.4466v1;
slides
1213/02/14Julian Leonard, ETH ZurichA novel experiment for coupling a Bose-Einstein condensate with two crossed cavity modesabstract
1106/02/14Elmar Haller, Strathclyde, UKSingle-atom-resolved detection and manipulation of strongly correlated fermions in an optical latticeabstract
1030/01/14Thomas MertzProject Report: Bosonic non-equilibrium dynamicsslides
923/01/141) Dandan Su
2) Peer Weder
1) Journal Club: Seeing bulk topological properties of band insulators in small photonic lattices
2) Journal Club: Radio frequency spectroscopy of polarons in ultracold Bose gases
1) arXiv:1312.6894;
slides
2) arXiv:1401.0952;
slides
816/01/14Ulrike BornheimerJournal Club: A Thermoelectric Heat Engine with Ultracold AtomsarXiv:1306.5754;
slides
712/12/131) Anna Golubeva
2) Anna Golubeva,
Peer Weder,
Andrii Sotnikov
1) Ultracold Fermions in optical lattices: the effects of anisotropy - bachelor thesis
2) overview of discussions with the group of Klaus Sengstock in Hamburg
1) slides
605/12/13Jonathan EndersGeneralized Wannier states in inhomogeneous lattices - master thesis topicslides
521/11/13Thomas MertzJournal Club: Superconducting Vortex Lattices for Ultracold AtomsarXiv:1302.3504;
slides
414/11/13Tao YinJournal Club: Probing real-space and time resolved correlation functions with many-body Ramsey interferometryarXiv:1307.0006;
slides
307/11/13Andreas GeißlerQuantum-phases of Rydberg dressed Bosons in an optical lattice - status reportslides
231/10/13Christian Münch (Berlin)Spin wave excitations in the s-f-modelabstract
117/10/131) Ivana Vidanovic
2) Andrii Sotnikov
1) Hybrid quantum simulations and dissipative dynamics of interacting bosons
2) Magnetic ordering of ultracold fermions in optical lattices with the broken spin symmetries
1) slides
2) slides

 

 

Sommersemester 2013

 

No.DateSpeakerTopicRelevant links
1125/07/13Andreas Geißler Journal Club: Direct Measurement of the van der Waals Interaction between Two Rydberg AtomsarXiv:1302.4262; slides
1018/07/131) Ivana Vidanovic
2) Andrii Sotnikov
1) Journal Club: Steady-State Phases and Tunneling-Induced Instabilities in the Driven Dissipative Bose-Hubbard Model
2) Overview of relevant talks on the conference in Sestri Levante
1) arXiv:1212.5444; slides
2) slides
911/07/13Johannes Bauer,
Harvard, USA
Engineering correlations with ultracold atoms: Kondo physics and non-equilibrium dynamicsabstract
804/07/131) Anna Golubeva
2) Daniel Cocks
Journal club:
1) Violation of Heisenberg's Measurement-Disturbance Relationship by Weak Measurements
2) Density matrix embedding: A simple alternative to DMFT

1) arXiv:1208.0034; slides
2) arXiv:1204.5783; slides

720/06/13Andrii Sotnikov Journal club:
a) Atomic spin-orbit coupling synthesized with magnetic-field-gradient pulses
b) Magnetically generated spin-orbit coupling for ultracold atoms

slides
a) arXiv:1306.2829
b) arXiv:1306.2606

613/06/13Jonathan EndersJournal club: Wannier functions in one-dimensional disordered systems:
Application to fractionally charged solitons
slides
journal article
506/06/13

Jan Pohlmann

Presentation of the Master's thesisslides
423/05/13

1) Ivana Vidanovic
2) Tao Yin

1) and 2) Overview of relevant talks on the conference in Trieste
2) Polaron project
slides
316/05/13Thomas Mertz,
ITP
Journal club: A superheated Bose-condensed gas

slides
arXiv:1212.5833

202/05/13Daniel Cocks,
ITP
Source Code Revision Control with GIT slides
125/04/13Ivana Vidanovic,
ITP
Collective modes of interacting bosons in artificial gauge fields whiteboard_1
whiteboard_2
whiteboard_3

 

 

Wintersemester 2012/2013

 

No.DateSpeakerTopicRelevant links
1514/03/13Michael Buchhold,
ITP Innsbruck
Keldysh Path Integral for Open Quantum Systems
1431/01/13Andrii Sotnikov,
ITP
Magnetic phases of mass- and population-imbalanced ultracold fermionic mixtures in optical lattices arXiv: 1301.1691; slides
1324/01/13 Daniel Cocks,
ITP
Correlated Topological Phases and Exotic Magnetism with Ultracold Fermions arXiv: 1212.5607; slides
1217/01/13Walter Hofstetter,
ITP
Quantum Impurity Perspective on Strongly Correlated Systems abstract
1113/12/12Jochen Rau,
ITP
Constructing a clock from an arbitrary irreversible process.abstract
1006/12/12 Ivana Vidanovic Journal club: Sudden quantum quenches in the presence of
frustration or background synthetic gauge fields

arXiv:1210.4554; slides

922/11/12Daniel CocksJournal club: The out-of-equilibrium time-dependent Gutzwiller approximation cont.arXiv:1204.2175;slides
815/11/12Jan PohlmannJournal club: Microscopic model for Feshbach interacting fermions in an optical lattice with arbitrary scattering length and resonance width.link
708/11/12Daniel CocksJournal club: The out-of-equilibrium time-dependent Gutzwiller approximationarXiv:1204.2175;slides
629/10/12

1) Ulf Bissbort
2) Ivana Vidanovic

1) Project report: Dance of the Atoms and Ions cont.
2) Quench from Mott insulator to superfluid.

1) slides
2) link;slides
522/10/12

1) Ulf Bissbort
2) Walter Hofstetter

1) Project report: Dance of the Atoms and Ions cont.
2) Using ions to perform quantum computing.

1) slides
2) slides

415/10/12 Ulf BissbortJournal club: Nanoplasmonic Lattices for Ultracold atoms (whiteboard presentation)arXiv:1208.6293
308/10/12

1) Andrii Sotnikov
2) Ulf Bissbort

1) Journal club: Thermalization of a pump-excited Mott insulator
2) Project report: Dance of the Atoms and Ions

1) arXiv:1103.0454;slides
2) slides
201/10/12Tao YinJournal Club: Observation of mesoscopic crystalline structures in a two-dimensional Rydberg gas

arXiv:1209.0944
slides

110/09/12Liang He and Daniel Cocks

Journal club:
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices
Viewpoint: Spin-Orbit Coupling Comes in From the Cold
Spin-Orbit Coupled Degenerate Fermi Gases

PaperA;slides
PaperB;slides
PaperC

 

Sommersemester 2012

 

No.DateSpeakerTopicRelevant links
1130/07/12

Phillipp Preiss,
Harvard, Massachusetts

 

Quantum gas microscopy of ultracold atoms in an optical latticeabstract
1009/07/12

Regine Frank,
Institut für Theoretische Physik, Karlsruhe

Optical Switchingabstract
902/07/12

Xiaoquan Yu,
SISSA, Italy

Superfluidity and localization in bosonic glassesabstract
818/06/12

1) Liang He

2) Daniel Cocks

1) Spin-orbit coupled bosonic gases in optical lattices

2) Spin-injection spectroscopy of a spin-orbit coupled Fermi gas

slides

arXiv:1205.3483;slides

711/06/12Andrew DaleyMeasuring entanglement in quench dynamics for bosons in an optical latticeabstract
604/06/12

Bernd Schmidt

Entropy and superfluidity of lattice fermions

slides
521/05/12Andrii SotnikovPopulation and mass imbalanced mixtures of fermions in optical latticesslides
414/05/12

Christoph Becker,
Institut für Laserphysik
Hamburg

Dynamics of ultracold Fermions in optical latticesabstract
307/05/12Michael BuchholdQuantum disordered phase near the Mott transition in the staggered-flux Hubbard model on a square latticearXiv:1204.3886;slides
223/04/12Harmen Warringa
ITP
Vortex formation in a rotating two-component Fermi gasabstract
116/04/12Daniel CocksDistributional exact diagonalization formalism for quantum impurity modelsarXiv:1201.6160;slides

 

Wintersemester 2011/2012

 

No.DateSpeakerTopicRelevant links
104/10/11

1) Bernd Schmidt

2) Frank Deuretzbacher

1) Interaction and filling induced quantum phases of dual Mott insulators of bosons and fermions.

2) Progress report of multibody effective Bose(-Fermi)-Hubbard parameters.

arXiv:1011.4503;slides

slides

210/10/11

1a) Daniel Cocks

1b) Michael Buchhold

2) Ulrike Bornheimer

1) Progress report on topological insulators project: a) Spin-mixing with interactions, b) trapping effects.

2) Proposal for achieving very low entropies in optical lattice systems.

slides;wiki

arXiv:1108.0628;slides

317/10/11

1) Ulf Bissbort

2) Julia Wernsdorfer

1) Quasi-particle theory of strongly correlated lattice bosons.

2) Code presentation of RDMFT code for 1D fermions with box disorder.

slides
424/10/111) Ulf Bissbort and Michael Buchhold1) Quasi-particle theory of strongly correlated lattice bosons. (cont.)slides
531/10/11

1) Andrii Sotnikov

2) Frank Deuretzbacher

1) Observation of a pairing pseudogap in a two-dimensional Fermi gas.

2) Multi-component quantum gases in hexagonal lattices.

arXiv:1110.2418;slides

slides

607/11/11

1) Liang He

2) Yongqiang Li

1) Fermionic relaxation in a condensate.

2) Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas.

slides

arXiv:1102.2735;slides

714/11/11Simone Felicetti
University of Rome
Testing the trade-o? between information and disturbance in sequential quantum measurements.abstract
821/11/11Paolo Pisanti
University of Rome
Properties of the fermion hard sphere fluid.abstract
928/11/11Daniel CocksExperimental realization of strong effective magnetic fields in an optical lattice.arXiv:1110.5314;slides
1005/12/11Yongqiang Li and Liang HeProgress report of pair superfluidity project.slides
1112/12/11Jochen RauMaking the most of noise: Learning Hamiltonians and relaxation dynamics from thermal data.abstract
1219/12/11

1) Ulf Bissbort

2) Eva Rafeld

1) Three-dimensional Anderson localization of ultracold matter.

2) Presentation of code for Time Evolving Block Decimation.

link;slides

slides

1309/01/12Michael BuchholdSoft edge modes in optical lattices with artificial gauge fields.slides
1416/01/12

1) Michael Buchhold

2) Ulrike Bornheimer

1) Soft edge modes in optical lattices with artificial gauge fields (cont).

2) Bose–Einstein condensation of photons in an optical microcavity

slides

link;slides

1530/01/12

1) Jan Pohlmann

2) Andrii Sotnikov

3) Bernd Schmidt

1) Preparation and spectroscopy of a metastable Mott insulator state with attractive interactions

2) Realization of a SU(2)xSU(6) System of Fermions in a Cold Atomic Gas

3) Progress report of bosonic QMC solver.

arXiv:1201.1008;slides

link;slides

wiki

1606/02/12Liang HeEvidence for orbital superfluidity in the P-band of a bipartite optical square lattice.link;slides
1713/02/12Ulrich Schneider
Ludwig-Maximilians-Universität
München
Superfluidity at negative temperatures: Bosons with tunable interactions in an optical lattice.abstract
1820/02/12

1) Eva Rafeld

2) Yongqiang Li

1) Evolution of condensate fraction during rapid lattice ramps.

2) Progress report of dipolar bosonic gases in an optical lattice.

arXiv:1201.3154;slides

wiki

1927/02/12Daniel CocksHow to use Mendeley tutorial session.
2007/03/12DPGDPG pratice session.
2119/03/12

Stephan Rachel
Yale University
New Haven

Topological insulators in the presence of interactionsabstract
2202/04/12Eva RafeldTopologically induced avoided band crossing in an optical chequerboard lattice.arXiv:1110.3716;slides

Sommersemester 2011

 

No.DateSpeakerTopicRelevant link
111/04/11

1) DPG

2) Frank Deuretzbacher

1) About DPG meeting

2) Quantum simulation of frustrated magnetism in triangular optical lattices.

arXiv:1103.5944

notes

218/04/11Yongqiang Li

Bose-Einstein condensate in an optical cavity

and relevant talk given at the DPG meeting.

slides
302/05/11Frank Deuretzbacher and Ulf Bissbort

Controlling Correlated Tunneling and Superexchange Interactions

with AC-Driven Optical Lattices.

arXiv:1104.1833

notes

409/05/11

Ulrike Bornheimer

Coupling ultracold atoms to mechanical oscillators.

arXiv:1103.1820

slides

516/05/11Elmer DoggenVortices and screening in dipolar Bose-Einstein condensates.
623/05/11Julia WernsdorferQuantum phase transition to unconventional multi-orbital superfluidity in optical lattices.

arXiv:1104.3456

slides

730/05/11Liang HeDual fermion approach to nonlocal correlations in the Hubbard model.

link

slides

806/06/11Bernd SchmidtStudying Two Dimensional Systems With the Density Matrix Renormalization Group

http://arxiv.org/abs/1104.3456arXiv:1105.1374

slides

920/06/11

1) Frank Deuretzbacher

2) Daniel Cocks

3) Bernd Schmidt

1) Occupation dependent Bose-Hubbard model.

2) Topological insulators: quantum spin hall states.

3) Loewe discussion.

slides

slides

1027/06/11

1) Frank Deuretzbacher

2) Liang He

3) Andrii Sotnikov

1) Spinor bosons in optical lattices.

2) a) Bose-Bose mixtures in triangular lattices; b) Imbalanced attractive Fermi gases in lattices.

3) Mass imbalanced Fermi gases in optical lattices.

slides

slides

wiki

1104/07/11

1) Bernd Schmidt

2) Eva Rafeld

1) Bosonic quantum Monte-Carlo solvers.

2) Quantum Simulation of an Antiferromagnetic Spin Chain in an Optical Lattice.

wiki

arXiv:1103.1372

slides

1211/07/11

1) Ulf Bissbort

2) Frank Deuretzbacher

1) Calculation of occupation dependent effective parameters;

2) Twisted superfluid in hexagon lattices.

wiki
1318/07/11

1) Yongqiang

2) Andrii

3) Andrii and Danny

1) Dipolar bosonic gases in optical lattices.

2) Mass imbalanced Fermi gases in optical lattices.

3) Photo-induced quantum Hall insulators without Landau levels.

wiki

wiki

arXiv:1104.4636

slides

1427/07/11

1) Yongqiang Li

2) Frank Deuretzbacher

3) Ulf Bissbort

1) Quantum degenerate mixtures of alkali and alkaline-earth-like atoms.

2) Multiple component quantum gases in hexagonal lattices.

3) Relaxation dynamics of an excited fermion in a bosonic condensate.

arXiv:1104.4430

slides

wiki

wiki

1501/08/11

1) Jan Pohlmann

2) Daniel Cocks

1) Quantum-mechanical study of three particle species in optical lattices.

2) Blockwise optimised matrix inversion for RDMFT calculations.

slides

wiki

1615/08/11

1) Daniel Cocks

2) Frank Deuretzbacher

1) Interaction effects on staggering-induced QSH phase transition.

2) Multi-component quantum gases in hexagonal lattices.

wiki

wiki

1722/08/11

1) Liang He

2) Daniel Cocks

1) Quantum phases of Bose-Bose mixtures in triangular lattices.

2a) Blockwise RDMFT matrix inverse for open/periodic boundaries.

2b) Topological insulators on a Mobius strip.

slides

slides

slides

1829/08/11

1) Bernd Schmidt

2) Jan Pohlmann

1) Cloud size project.

2) Interaction-induced orbital excitation blockade of ultracold atoms in an optical lattice.

slides

arXiv:1105.5834

slides

1905/09/11

1) Bernd Schmidt

2) Michael Buchhold

3) Julia Wernsdorfer

1) Bosonic CT-QMC impurity solver.

2a) Spin mixing in the CT-AUX solver.

2b) Photon-Assisted Tunneling in a Biased, Strongly Correlated Bose Gas.

3) Expansion dynamics project.

wiki

arXiv:1105.4629

slides

2012/09/11

1) Julia Wernsdorfer

2) Frank Deuretzbacher

1) Multi-band spectroscopy of ultracold fermions: Observation of reduced tunneling in attractive Bose-Fermi mixtures.

2) Multi-orbital and density-induced tunneling of bosons in optical lattices.

arXiv:1107.2322

slides

arXiv:1108.3013

slides

2126/09/11Eva RafeldObservation of correlated particle-hole pairs and string order in low-dimensional Mott insulators.

arXiv:1108.3317

slides


Wintersemester 2010/2011

 

No.Date   Speaker   TopicLink to articles
106/09/10Denis Semmler
Quantitative Determination of Temperature 
in the Approach to Magnetic Order of 
Ultracold Fermions in an Optical Lattice 
arXiv:0912.3790
slides
220/09/10Bernd Schmidt
Thermodynamics of the 3D Hubbard model on 
approach to the Neel transition 

arXiv:1009.2759

 

slides

 

327/09/10Yongqiang Li
The Dicke Quantum Phase Transition with 
a Superfluid Gas in an Optical Cavity
arXiv:0912.3261
slides
418/10/10Irakli Titvinidze
Thermodynamics of the tree-dimensional Hubbard model: 
Implications for cooling cold atomic gases in optical lattices
arxiv:1009.2761
525/10/10Reza Bakhtiari
Thermometry and Refrigeration of a Two-Component 
Mott Insulator Ultracold Atoms
arxiv:1008.4610
68/11/10Bernd Schmidt
Controlling and Detecting Spin Correlations of Ultracold Atoms 
in Optical Latticies

arxiv:1009.2415

slides

715/11/10DPG
About DPG meeting
822/11/10Yongqiang Li
High-resolution Imaging and manipulation of Ultracold Fermions

arxiv:1011.1004v1

slides

929/11/10Irakli Titvinidze
About Trionic project
 slides
1006/12/10Daniel Cocks
Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
arxiv:1012:0049
1113/12/10

1) Julia Wernsdorfer

2) Bernd Schmidt

1) 1D disordered system 
2) Cloud size experiment

1) slides

2) slides

1210/01/11

1) Ulf Bissbort

2) Liang He

3) YongqiangLi

1) About LOEWE CSC meeting
2) a) Dipolar fermions in square lattice.
b) Bose-Bose mixtures in triangular lattice
3) a) anisotropic pair-superfluidity in trapped two-component Bose gases. 
time. If I have, I will also talk about the
b) Self-organization phase transition of strongly-interacting Bose gases
coupled to an optical cavity.

1) slides

2) slides

3) slides

1317/01/11

1) Bernd Schmidt

2) Michael Buchhold

1) Cloud size experiment
2) Diagrammatic Monte Carlo methods for fermions (part one)

1) slides

2) slides

1424/01/11Michael Buchhold
Diagrammatic Monte Carlo methods for fermions (part two)
slides
1531/01/11

1) Ulrike Bornheimer

2) Denis Semmler

1) Expansion behaviour of ultracold bosonic gases in an optical lattice
2) Presented doxygen commented codes 
slides
1607/02/11Michael Buchhold
Diagrammatic Monte Carlo methods for fermions (part three)
slides
1714/02/11

1) Irakli Titvinidze

2) Eva Rafeld

1) Presented doxygen commented codes 
2) Bound pairs of bosons and fermions in a one dimensional optical lattice
slides
1821/02/11Andrii Sotnikov
Coherent Interaction of a single fermion with a small bosonic field: 
arXiv:1011.3807v1
slides
1928/02/11Daniel Cocks
Analytical continuatuion using the maximal entropy method
slides
2007/03/11DPG
About DPG meeting

 

Sommersemester 2010

No. Date Speaker Topic Link to article
1 19/04/10 Yongqiang Li
In situ observation of incompressible 
Mott-insulating domains in ultracold 
atomic gases + Research Advance
Nature 460, 995-998 

2 26/04/10 Michael Buchhold
Bachelor thesis presentation 
slides
3 03/05/10 Ulf Bissbort
RPA papers   a)   b) + research advance 
a)       b) 
4 10/05/10 Ulf Bissbort
RPA papers   a)   b) + research advance
a)       b) 
5 17/05/10 Julia Wernsdorfer
"Origin of the Zero Bias Anomaly in the 
Anderson-Hubbard Model" +  research advance
Wortis_Marked
6 24/05/10 Vacation
7 31/05/10

1) Reza Bakhtiari

2) Antonio Privitera

1) Cloud size experiment 
2) Polarons 
8 07/06/10

1) Denis Semmler

2) Liang He

1) Research plans
2) Spin dynamics and domain formation of a spinor 
Bose-Einstein condensate in an optical cavity
arXiv:1005.4121
9 14/06/10 1) Ulf Bissbort

2) Reza Bakhtiari, Irakli Titvinidze, Bernd Schmidt

1) Status of his PhD work 
2) Cloud size experiment   
10 21/06/10 1) Liang He
1) Spontaneous pattern formation in an 
anti-ferromagnetic quantum gas
1) arXiv:0904.2339
11 28/06/10 1) Reza Bakhtiari, Irakli Titvinidze, Bernd Schmidt
1) Cloud size experiment
12 05/07/10 1) Irakli Titvinidze

2) Denis Semmler

1) Probing the superfluid to Mott insulator 
transition at the single atom level 
2) Single-atom resolved fluorescence imaging 
of an atomic Mott insulator 
1) arXiv:1006.0754
2) arXiv:1006.3799
13 19/07/10

1) Steffen Backes

2) Reza Bakhtiari, Bernd Schmidt, Irakli Titvinidze

1) Progress in his bachelor work 
2) Cloud size experiment
1) slides
14 26/07/10 Ulf Bissbort
About Conference in Les Houches School
15 02/08/10

1) Bernd Schmidt

2) Yongqiang Li

1) Cloud size experiment
2) "Spin gradient demagnetization cooling 
of Ultracold atoms"
arXiv:1006.4674
16 09/08/10 Irakli Titvinidze
1) "Canted AF order ...."
2) "Neel transition of lattice fermions ..." 
1) arXiv:1007.545
2) PRL,065301(2010)
17 16/08/10  Liang He
1) "Quantum Phases of Cold Polar Molecules 
in 2D Optical Lattices" 
2) "Supersolid Phase with Cold Polar Molecules 
on a Triangular Lattice"
1) PRL104,125301(2010)
2) PRL104,125302(2010)

 

 

 

Wintersemester 2009/2010

 

No. Date Speaker Topic Link to article
1 11/01/10

1) Liang He

2) Irakli Titvinidze

2) Ulf Bissbort

1) Bernier et al.: Cooling fermionic atoms in optical lattices by shaping the confinement, 2) Report from Utrecht conference

Phys. Rev. A 79, 061601(2009)

 

Sommersemester 2009

 

No. Date Speaker Topic Link to article
1 27/04/09 Julia Wernsdorfer Brief Report from visit to Inguscio group at Lens - Florence (Italy) ----
2 11/05/09 Miodrag Kulic Pairing and some novel effects in ultracold atomic gases with population imbalance Abstract
3 18/05/09 David Roosen Nonequilibrium Spin Dynamics in the Ferromagnetic Kondo Model Abstract presentation
4 25/05/09 Reza Bakhtiari Bose-Fermi mixture: a brief review Mainz group paper
5 08/06/09 Denis Semmler Stochastic Greens function method for the disordered Hubbard model Abstract presentation
6 22/06/09 Antonio Privitera Trionic phase of ultracold atoms in optical lattices http://itp.uni-frankfurt.de/cms/?id= presentation
7 29/06/09 Ulf Bissbort Bragg spectroscopy in ultracold bosonic gases Abstract http://itp.uni-frankfurt.de/cms/?id=
8 06/07/09 Philipp Ernst Bragg Spectroscopy no abstract available
9 20/07/09 Irakli Titvinidze Denis Semmler A universal trimer in a Three-component Fermi Gas, Finite temperature theory of bosons in optical lattices Efimov paper Bosons paper http://itp.uni-frankfurt.de/cms/?id=




Sommersemester 2008

 

No. Date Speaker Topic Link to article
1 31/03/08 Denis Semmler Anderson Localization in the Anderson-Hubbard-Hamiltonian with Binary disorder? ---
2 14/04/08 Falk May Calculating transport through mesoscopic systems using NRG ---
3 21/04/08 Ulf Bissbort Stochastic Mean Field Theory for the Disordered Bose-Hubbard Model ---
4 05/05/08 Ulf Bissbort Stochastic Mean Field Theory for the Disordered Bose-Hubbard Model II ---
5 19/05/08 Julia Wernsdorfer Two-component Bosons in a Two-Dimensional Optical Lattice presentation
6 26/05/08 Denis Semmler Disordered Bose-Fermi mixtures in optical lattices ---
7 26/05/08 Andreas Hubener Bosonic Dynamical Mean Field Theory ---
8 09/06/08 Falk May Calculating transport through mesoscopic systems using NRG ---
9 21/07/08 Julia Wernsdorfer Investigation of interacting bose-bose mixture presentation




Wintersemester 2007/2008

 

No. Date Speaker Topic Link to article
1 09/10/07 Denis Semmler Julien Chabé et al.: Experimental observation of the Anderson transition with atomic matter waves arXiv:0709.4320
2 16/10/07 David Roosen Introduction to non-equilibrium NRG methods I presentation
3 23/10/07 David Roosen Introduction to non-equilibrium NRG methods II ---
4 06/11/07 David Roosen Introduction to non-equilibrium NRG methods III ---
5 13/11/07 Irakli Titvinidze V.G. Rousseau and P.J.H. Denteneer: Quantum phase of mixtures of atoms and molecules on optical lattices arXiv:0710.2220
6 20/11/07 Michiel Snoek Strong correlations in ultracold gases talk
7 27/11/07 Andreas Hubener Dynamics of strongly interacting bosons by Gutzwiller approach presentation
8 04/12/07 Andreas Hubener Critical velocity of strongly interacting bosons in optical lattices ---
9 08/01/08 Csaba T?ke Lahaye et al.: Strong dipolar effects in a quantum ferrofluid Nature 448, 672 (2007)
10 15/01/08 Christopher Eichler
Single Impurity Anderson Model and NRG method I
presentation
11 22/01/08 Christopher Eichler Single Impurity Anderson Model and NRG method II ---
12 29/01/08 Julia Wernsdorfer K. Goral, L. Santos, and M. Lewenstein: Quantum Phases of Dipolar Bosons in Optical Lattices presentation
13 18/03/08 Irakli Titvinidze Supersolid order in extended Hubbard models ---
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