There is a non-regular sequence of workshops on the topic.

# The fifth workshop will be held 7th - 8th July 2025
at the Physics Department of Kiel University

Solving the Two-time Kadanoff-Baym Equations.
Status and Open Problems

Organization: Michael Bonitz, Jan-Philip Joost, and Erik Schroedter

Participants: Karsten Balzer, Thomas Blommel, Michael Bonitz, Iva Brezinova (tbc),
Fabio Caruso, Nicola Gullo, Anna Hehn, Nils Jacobsen, Frank Jahnke, Jan-Philip Joost,
Tim Kalsberger, Christopher Makait, Yaroslav Pavlyukh, Erik Schroedter, Michael Sentef,
Vaclav Spicka, Maksymilian Sroda, Riku Tuovinen, Claudio Verdozzi, Vojtech Vlcek,
Björn Wurst

Scientific program: Start: July 7, 9:00, End: July 8, 12:30
More information follows. There will be no conference fee.

Inquiries: Interested in participating or in finding nearby accomodation?
Please, contact the organizers.

Download: Workshop poster

    -- Program (Draft June 5) --

    Monday Schedule (9:00 - 18:00)
    ⦿ Morning Block I
    • ⦾ Nicola Lo Gullo — Out-of-equilibrium one-dimensional flatband systems
      in a STM cavity
      (25 + 10 min)
    • ⦾ Fabio Caruso — Electron-phonon interactions in the time domain: from
      non-equilibrium phonon dynamics to theoretical spectroscopy
      (25 + 10 min)

    ⦿ Morning Break (~10:30 - 10:50)

    ⦿ Morning Block II
    • ⦾ Jan-Philip Joost — New Horizons for NEGF: Enabling Large-Scale
      Time-Dependent Simulations via Quantum Fluctuations
      (25 + 10 min)
    • ⦾ Christopher Makait — Mitigating the aliasing problem in GKBA
      simulations of uniform plasmas
      (15 + 5 min)
    • ⦾ Maksymilian Środa — Memory-Efficient Nonequilibrium Green's Function
      Framework Built On Quantics Tensor Trains
      (25 + 10 min)

    ⦿ Lunch Break (12:30 - 14:00)

    ⦿ Afternoon Block I: Introduction to posters
    • ⦾ Iva Brezinova — Projective purification of correlated reduced density
      matrices
      (25 + 10 min)
    • ⦾ Elias Pescoller — An information theoretic approach to the reconstruction
      of reduced density matrices (15 + 5 min)
    • ⦾ Anna Hehn — Extending the tool set for excited states in solids — from
      static excited-state properties to non-adiabatic molecular dynamics
      (25 + 10 min)

    ⦿ Coffee Break (~15:30 - 15:50)

    ⦿ Afternoon Block II
    • ⦾ Claudio Verdozzi — Nanoskyrmions in spin–electron systems, with a
      preliminary outlook on photonic effects (25 + 10 min)
    • ⦾ Vaclav Spicka — TBD (25 + 10 min)
    • ⦾ Frank Jahnke — TBD (25 + 10 min)

    Tuesday Schedule (9:00 - 12:30)
    ⦿ Morning Block I
    • ⦾ Vojtech Vlcek — Real-Time Dyson-Expansion Scheme: Efficient Inclusion
      of Dynamical Correlations in Nonequilibrium Spectral Properties
      (25 + 10 min)
    • ⦾ Thomas Blommel — Non-equilibrium dissipation-induced band deformation
      in strongly excited correlated electron materials
      (15 + 5 min)
    • ⦾ Erik Schroedter — Nonequilibrium Spectra within the G1-G2 Scheme (15 + 5 min)

    ⦿ Morning Break (~10:30 - 10:50)

    ⦿ Morning Block II
    • ⦾ Michael Sentef — Designing Quantum Materials with Light (25 + 10 min)
    • ⦾ Nils Jacobsen — Probing topological Floquet states in graphene with
      ultrafast THz STM
      (15 + 5 min)

    ⦿ Morning Break II (~ 15 min)

    ⦿ Morning Block III
    • ⦾ Yaroslav Pavlyukh — Dynamics of Open Systems Beyond the Wide-Band
      Limit: A Linear-Scaling Approach
      (25 + 10 min)
    • ⦾ Riku Tuovinen — Thermoelectric energy conversion in molecular junctions
      out of equilibrium simulations
      (25 + 10 min)

    ⦿ Lunch Break ( – )

    ⦿ Concluding discussion


    # The fourth workshop was held 11th - 12th March 2019
    at the Physics Department of Kiel University

    Solving the Two-time Kadanoff-Baym Equations.
    Status and Open Problems

    Organization: Michael Bonitz, Karsten Balzer and Jan-Philip Joost
    Confirmed participants:
    Karsten Balzer, Michael Bonitz, Jürgen Braun, Fabio Covito, Hubert Ebert, Nicola Gullo,
    Sönke Hese, Jan-Philip Joost, Hao Lin, Andrea Marini, Yaroslav Pavlyukh, Maximilian
    Rasmussen, Miriam Scharnke, Niclas Schlünzen, Michael Sentef, Gianluca Stefanucci,
    Riku Tuovinen, Robert van Leeuwen, Claudio Verdozzi,
    Scientific program: There will be approximately 10 invited talks (35 min + discussion),
    short talks and posters and ample time for discussion
    Schedule: arrival and joint dinner: Sunday afternoon.
    Scientific sessions: Monday morning-Tuesday noon.
    Departure: Tuesday afternoon

    Workshop flyer: download

    Schedule Monday 11th March:
    09:00-09:50 Gianluca Stefanucci
    10:00-10:50 Daniel Karlsson
    11:00-11:30 Break and discussions
    11:30-12:20 Riku Tuovinen
    12:30-14:00 Lunch and discussions
    14:00-14:50 Nicola Lo Gullo
    15:00-15:50 Jan-Philip Joost
    16:00-16:30 Break and discussions
    16:30-17:00 Niclas Schlünzen
    17:00-17:30 N. Walter Talarico
    Schedule Tuesday 12th March:
    09:00-09:50 Andrea Marini
    09:50-10:30 Hubert Ebert
    10:30-11:00 Break and discussions
    11:00-11:50 Yaroslav Pavlyukh
    11:50-12:40 Claudio Verdozzi

    Talks

    Author(s)Title of presentationabstracttalk
    Hubert Ebert and Jürgen Braun ''Theoretical description of ultrafast laser-induced demagnetization monitored by photo-emission using the non-equilibrium Green function formalism'' file file
    Nicola Lo Gullo ''Numerical solution of the Dyson equation in the two-times plane: applications to quantum quenches and transport in many-body quantum systems'' file file
    Jan-Philip Joost ''Numerical Challenges in the Propagation of the KBEs'' file file
    Daniel Karlsson ''Speeding up GKBA calculations using initial correlations'' file file
    Andrea Marini ''The Baym-Kadanoff equation within the GKBA: the only way to a realistic, ab-initio approach? Pros and Cons.'' file file
    Yaroslav Pavlyukh ''Nonequilibrium electron-boson systems'' file file
    Niclas Schlünzen ''A Selfenergy Cookbook — State-of-the-Art Computing for the NEGF Key Ingredient'' file file
    Gianluca Stefanucci ''Toward a NEGF description of photoexcited organic molecules'' file file
    N. Walter Talarico and Nicola Lo Gullo ''Time dependent energy-current of open and interacting systems out of equilibrium'' file file
    Riku Tuovinen ''Adiabatic Preparation of a Correlated Symmetry‐Broken Initial State with the Generalized Kadanoff-Baym Ansatz'' file file
    Claudio Verdozzi ''Steering Magnetic Skyrmions with Nonequilibrium Green’s Functions'' file file
    Markku Hyrkäs
    (poster)
    ''Diagrammatic Expansion for Positive Spectral Functions in the Steady-State Limit'' file file

    Updated March 18, 2019



    # The third workshop

    Non-equilibrium techniques in cosmology
    and condensed matter systems

    was held 11th - 13th September 2013 at DESY Hamburg, Germany.
    It was organized by Matthias Garny, Martin Eckstein and Thomas Konstandin.

    # The second informal workshop

    Solving the Two-time Kadanoff-Baym Equations.
    Status and Open Problems

    was held 23th - 25th March 2010 in Kiel (Germany), Physikzentrum - Leibnizstrasse 15.
    For details, including program and talks click here.