Probing Complex Quantum Dynamics through
Out-of-time-ordered Correlators

International Workshop
11 - 15 October 2021 

Scrambling, loss and possible retrieval of quantum information in many-body systems are important concepts presently studied in various setups. The workshop will discuss progress and future directions in the inter-related fields of information scrambling, complex quantum dynamics, chaos and criticality, by focusing on out-of-time-ordered correlators and related tools. Quantifying the time-growth of operators provides a unifying paradigm that favors the convergence of different physics communities to be represented at the workshop, comprising both theory and experiment. After a long period, we plan to resume the incomparable face-to-face exchange of scientific ideas and results at the MPI-PKS, but we will also offer virtual participation.

Topics include

  • Out-of-time-ordered correlators (OTOCs), spectral form factors, and related tools, as indicators for various types of quantum many-body dynamics
  • Relation of OTOCs to other measures of (in)stability and complexity growth
  • Experiments and experimental protocols
  • Generality of the bounds on chaos
  • Probing quantum chaos and holography
  • Semiclassical approaches to OTOCs
  • OTOCs, entanglement and quantum thermodynamics
  • OTOCs and the eigenstate thermalization hypothesis
  • Dynamical quantum phase transitions and many-body chaos near phase transitions

We plan for a hybrid workshop with a number of participants on-site and the others connected via video conference.
For accepted participants, online attendance will be possible in any case. The organizers will decide and inform about an option of on-site attendance at a later stage.

Invited speakers

A. Altland (DE)
S. Das Sarma (US)
A. del Campo (LU)
L. Ferreira dos Santos (US)
M. Gärttner (DE)
V. Galitski (US)
I. García-Mata (AR)
M. Heyl (DE)
C. Jarzynski (US)
M. Knap (DE)
J. Kurchan (FR)
A. Lakshminarayan (IN)
A. Lucas (US)
R. Moessner (DE)
T. Morita (JP)
H. Pastawski (AR)
X. Peng (CN)
S. Sachdev (US)
M. Srednicki (US)
S. Tomsovic (US)
M. Ueda (JP)
J.-D. Urbina (DE)
J. Verbaarschot (US)
C. von Keyserlingk (UK)
D. Wisniacki (AR)
N. Yunger Halpern (US)
W. Zurek (US)

Scientific Coordinators

Rodolfo A. Jalabert
(Université de Strasbourg, France)

Klaus Richter
(Universität Regensburg, Germany)


Katrin Lantsch
(Max Planck Institute for the Physics of Complex Systems, Dresden, Germany)


Application is closed.

On-site participants pay the registration fee of 140€. Costs for accommodation and meals for on-site participants will be covered by the Max Planck Institute.
Limited funding is available to partially cover travel expenses.

No fee for remote participation.

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Scientific program

The scientific program starts on Monday, 11th October, 13:45 and ends on Friday, 15th October, 12:15.
All times in the program are Central European Summer Time (GMT/UTC +2).

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Technical requirements

PROTOC21 will use Zoom as its online platform for all the talks and the poster flash session. The poster session will be fully virtual and held via the platform