Seminar on Aspects of Quantum Matter Theory

Im Wintersemester 2022/23 findet das Arbeitsgruppenseminar donnerstags von 14:00 bis 16:15 im Seminarraum 2.114 statt. Im Seminar diskutieren wir Forschungsergebnisse unserer Arbeitsgruppe, sowie neue Veröffentlichungen und Entwicklungen in folgenden Themenbereichen: Ultrakalte Quantengase, Quantensimulation, Quantencomputing, Quantenoptik, und Quantenvielteilchensysteme. Interessierte Studierende sind herzlich willkommen, am Seminar teilzunehmen!


Our group seminar takes place every Thursday from 14:00 to 16:15 in room 2.114. Each seminar is devoted to presenting and discussing our recent research 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 very welcome to attend the seminar.

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


WS22/23  SS22  WS21/22  SS21  WS20/21  SS20  WS19/20


Winter Semester 2022/2023

 DateSpeakerTopic
20/10/22    
27/10/22    
03/11/22    
10/11/22    
17/11/22    
24/11/22    
01/12/22    
08/12/22    
15/12/22    
22/12/22    
12/01/23    
19/01/23    
26/01/23    
02/02/23
09/02/23    


Forthcoming schedule of the group seminar (password protected)




Summer Semester 2022

DateSpeakerTopic
14/07/22 Morad Ebrahimkhas Status report
  Youjiang Xu Journal club: An introduction of topological states in quasicrystals
07/07/22 Arijit Dutta Status report
  Teodora Niculae Journal club: Encoding of Matrix Product States into Quantum Circuits of One- and Two-Qubit Gates
30/06/22 Morad Ebrahimkhas Journal club: Metal-insulator transition in the disordered Hubbard model of the Lieb lattice
23/06/22 Arijit Dutta Journal club: Probing finite-temperature observables in quantum simulators with short-time dynamics
09/06/22 Youjiang Xu Status report: generalizing the single-site DMFT to approximate non-local self-energy by 1/d expansion
02/06/22 Youjiang Xu Journal club: Imaging tunable quantum Hall broken-symmetry orders in graphene
19/05/22 Morad Ebrahimkhas Journal club: Bosonic Bott Index and Disorder-Induced Topological Transitions of Magnons
12/05/22 Arijit Dutta ; Mathieu Barbier Journal club: Breakdown of quantisation in a Hubbard-Thouless pump ; Breakdown of topological Thouless pumping in the strongly interacting regime ; Splitting of topological charge pumping in an interacting two-component fermionic Rice-Mele Hubbard model
05/05/22 Irakli Titvinidze Journal club: Phase diagram of superconductivity in the integer quantum Hall regime
  Youjiang Xu Journal club: Spectral functions of the half-filled 1D Hubbard chain within the exchange-correlation potential formalism
28/04/22 Morad Ebrahimkhas Status report
  Teodora Niculae Status report
21/04/22 Arijit Dutta Journal club: Topological Frequency Conversion in Strongly Driven Quantum Systems
  Mathieu Barbier Journal club: Accessing the topological Mott insulator in cold atom quantum simulators with realistic Rydberg dressing
14/04/22 Irakli Titvinidze Hubbard model on the kagome lattice with time-reversal invariant flux and spin-orbit coupling ; Spin-orbit coupling in the kagome lattice with flux and time-reversal symmetry


Winter Semester 2021/2022

DateSpeakerTopic
17/02/22 Arijit Dutta Journal club: Anomalous Floquet-Anderson Insulator as a Nonadiabatic Quantized Charge Pump
10/02/22 Urs Gebert Journal club: Realising the Symmetry-Protected Haldane Phase in Fermi-Hubbard Ladders
03/02/22 Youjiang Xu "Invisible Flat Bands on a Topological Chiral Edge"
27/01/22 Mathieu Barbier Journal club: Blackbody-radiation-induced facilitated excitation of Rydberg atoms in optical tweezers
  Morad Ebrahimkhas Journal club: Connecting topological Anderson and Mott insulators in disordered interacting fermionic systems
20/01/22 Irakli Titvinidze Journal club: Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model
13/01/22 Mathieu Barbier Journal club: Self-generated quantum gauge fields in arrays of Rydberg atoms
16/12/21 Youjiang Xu Journal club: Discovering hydrodynamic equations of many-body quantum systems
09/12/21 Irakli Titvinidze Journal club: Dynamical mean-field theory of correlated hopping: A rigorous local approach
  Urs Gebert Journal club: Observation of Dislocation-Induced Topological Modes in a Three-Dimensional Acoustic Topological Insulator
02/12/21 Arijit Dutta Journal club: Floquet Engineering Correlated Materials with Unpolarized Light
  Morad Ebrahimkhas Journal club: Interplay of interactions, disorder, and topology in the Haldane-Hubbard model
25/11/21 Irakli Titvinidze "Falicov-Kimball model with Density dependent Peierls phase: DMFT study"
18/11/21 Arijit Dutta "Falicov-Kimball model with Density dependent Peierls phase: QMC study"
  Youjiang Xu "Emergent chiral symmetry and domain-wall states in quantum Hall ferromagnets formed by topological flat band with Hubbard interaction"
11/11/21 Mathieu Barbier Journal club: Competition and interplay between topology and quasi-periodic disorder in Thouless pumping of ultracold atoms
  Morad Ebrahimkhas "Emergence of antiferromagnetic Chern insulator in a centrosymmetric time-reversal-invariant system"
04/11/21 Irakli Titvinidze Journal club: Local vs non-local correlation effects in interacting quantum spin Hall insulators
28/10/21 Youjiang Xu Status report
  Mathieu Barbier Journal club: Controlling quantum many-body dynamics in driven Rydberg atom arrays
21/10/21 Morad Ebrahimkhas Journal club: Temperature-Driven Gapless Topological Insulator ; Extended Falicov-Kimball model: Exact solution for finite temperatures ; Extended Falicov–Kimball model: Exact solution for the ground state ;
  Arijit Dutta Journal club: Measurement of Spin Chern Numbers in Quantum Simulated Topological Insulators


Summer Semester 2021

DateSpeakerTopic
15/07/21 Morad Ebrahimkhas Journal club: Higher-order topological insulators in a magnetic field
  Irakli Titvinidze Journal club: Dynamical Cluster Approximation Study of Electron Localization in the Extended Hubbard Model
08/07/21 Mathieu Barbier Journal club: Topologically protected edge states in small Rydberg systems ; Charge Excitation Dynamics in Bosonic Fractional Chern Insulators
  Arijut Dutta Journal club: Double-Exchange Interaction in Optically Induced Nonequilibrium State: A Conversion from Ferromagnetic to Antiferromagnetic Structure
01/07/21 Youjiang Xu "An introduction to the restructured R-DMFT code"
  Mathieu Barbier Journal club: Observation of a symmetry-protected topological phase of interacting bosons with Rydberg atoms ; Realization of a Density-Dependent Peierls Phase in a Synthetic, Spin-Orbit Coupled Rydberg System
24/06/21 Arijit Dutta "Nonequilibrium transport and dynamics in Mott insulators II"
  Morad Ebrahimkhas AF-Chern insulator in time-reversal-invariant Harper-Hofstadter-Hubbard model
17/06/21 Martina Jung Journal club: A learning algorithm with emergent scaling behavior for classifying phase transitions
10/06/21 Arijit Dutta "Nonequilibrium transport and dynamics in Mott insulators"
  Mathieu Barbier Status update
27/05/21 Youjiang Xu "Building Flat-band Models via Gram Matrices"
  Urs Gebert Journal club: Photoinduced anomalous Hall effect in the interacting Haldane model: targeting topological states with pump pulses
20/05/21 Irakli Titvinidze Journal club: Simulating a ring-like Hubbard system with a quantum computer
06/05/21 Youjiang Xu "Realizing Multicriticality in Generalized Dicke Models "
  Martina Jung Journal club: Transverse spin dynamics in the anisotropic Heisenberg model realized with ultracold atoms.
29/04/21 Mathieu Barbier Test talk
  Urs Gebert Journal club: Short introduction to topological quantum computing.
22/04/21 Irakli Titvinidze Status update
  Morad Ebrahimkkhas Journal club: Mott insulating states with competing orders in the triangular lattice Hubbard model
15/04/21 Michael Pasek Tutorial: "Introduction to the Git version control system"
  Irakli Titvinidze "Falicov-Kimball model with Density dependent Peierls phase"
     



Winter Semester 2020/2021

 DateSpeakerTopic
18/02/21 Urs Gebert  Status report 
  Michael Pasek / Jan Lennart Bönsel Status report 
11/02/21 Urs Gebert  Journal club: Microscopy of the interacting Harper-Hofstetter model in the two-body limit
  Irakli Titvinidze  Journal club: Realization of density-dependent Peierls phases to engineer quantized gauge fields coupled to ultracold matter
04/02/21 Jan Lennart Bönsel Journal club: Mixed-State Entanglement from Local Randomized Measurements
  Mathieu Barbier Journal club: Quantum phases of Rydberg atoms on a kagome lattice part-2
28/01/21 Mathieu Barbier Journal club: Quantum phases of Rydberg atoms on a kagome lattice part-1
  Morad Ebrahimkkhas "Anti-ferromagnetic Chern insulator in time-reversal- invariant Harper-Hofstadter-Hubbard model"
21/01/21 Irakli Titvinidze "An Introduction to the Numerical Renormalization Group"
  Jan Lennart Bönsel Status report
14/01/21 Michael Pasek Status report
  Martina Jung Status report
17/12/20 Morad Ebrahimkkhas Journal club: Landau levels in quasicrystals
  Michael Pasek Status report 
10/12/20 Mathieu Barbier Journal club: Quench Dynamics of a Fermi Gas with Strong Long-Range Interactions
03/12/20 Irakli Titvinidze Journal club: Topological states on the breathing Kagome lattice
  Tobias Raum Status report
26/22/20 Michael Pasek Journal club: The Mott transition as a topological phase transition
  Martina Jung Status report
19/11/20 Tobias Raum Journal club: Generalized bulk–boundary correspondence in non-Hermitian topolectrical circuits
  Bernhard Irsigler Journal club: Simulating Twistronics without a Twist
12/11/20 Mathieu Barbier Status report 
  Morad Ebrahimkkhas "Lattice symmetry and emergence of antiferromagnetic quantum Hall states" 
05/11/20 Daniel Wessel  "Robust Generation of Entanglement for Stabilization of the Quantum Computing Platform"
  Irakli Titvinidze Status report
                 
                   
 


Summer Semester 2020

 DateSpeakerTopic
02/07/20 Urs Gebert Journal club: Many-Body Topological and Skin States without Open Boundaries
  Tobias Raum Status report
25/06/20 Maarten Grorhus Status report
18/06/20 Irakli Titvinidze Status report 
  Michael Pasek Journal club: Observation of Bose–Einstein condensates in an Earth-orbiting research lab
28/05/20 Tobias Raum Journal club: The European Quantum Technologies Roadmap
  Henrik Luetjeharms Status report and journal club: How to read a paper
14/05/20 Mathieu Barbier Journal club: Dynamics of ultracold quantum gases in the dissipative Fermi–Hubbard model 
  Maarten Grorhus Journal club: Topological insulator laser: Theory
07/05/20

Michael Pasek

Journal club: Local Entanglement Entropy and Mutual Information across the Mott Transition in the Two-Dimensional Hubbard Model
 

Henrik Luetjeharms

Journal club: Quantum phases of dipolar bosons in optical lattices
30/04/20 Irakli Titvinidze Journal club: Many-body topological invariants from randomized measurements in synthetic quantum matter
  Jan Lennart Bönsel Journal club: Topological characterization of periodically driven quantum systems
23/04/20 Bernhard Irsigler  Journal club: Nonlocal annihilation of Weyl fermions in correlated systems 
  Mathieu Barbier Status report
                 
                   
 


Winter Semester 2019/2020

Date

Speaker

Topic
13/02/20

 Irakli Titvinidze

Talk for APS-meeting
  Bernhard Irsigler Journal club: Quantum-classical simulation of two-site dynamical mean-field theory on noisy quantum hardware

06/02/20

Mathieu Barbier Status report
  Michael Pasek Journal club: Topological field theory of time-reversal invariant insulators

30/01/20

Irakli Titvinidze Journal club: Topological Transition in a Non-Hermitian Quantum Walk

23/02/20

Jan Lennart Bönsel Status report

16/02/20

Mathieu Barbier Journal club: Density wave and supersolid phases of correlated bosons an optical lattice and Quantum phases from competing short- long-range interactions in an optical lattice

12/12/19

Jaromir Panas Status report
 

Michael Pasek

Status report

05/12/19

Irakli Titvinidze Journal club: Bond formation effects on the metal-insulator transition in the half-filled kagome Hubbard model

28/11/19

Jaromir Panas Journal club: Competing ground states of strongly correlated bosons in the Harper-Hofstadter-Mott model  and Bosonic quantum Hall states in single-layer two-dimensional optical lattices 

21/11/19

Michael Pasek Status report and Journal club: Many-Body Delocalization in the Presence of a Quantum Bath

14/11/19

Bernhard Irsigler Talk for Task-force meeting
 

Jan Lennart Bönsel

Journal club: To catch and reverse a quantum jump mid-flight
07/11/19

Guest

Talk
31/10/19

Mathieu Barbier

Status report
 

Urs Gebert

Journal club: Quantum-Chaos challenges Many-Body-Localization
24/10/19

Jaromir Panas

Status report
17/10/19

Mohsen Hafez-Torbati

Status report
 

Bernhard Irsigler

Journal club: Observation of nodal-line semimetal with ultracold fermions in an optical lattice

                 
 
                   
 


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