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TT: Fachverband Tiefe Temperaturen

TT 17: Focus Session: Quantum Interactive Dynamics II (joint session DY/TT)

Monday, March 18, 2024, 15:00–18:00, A 151

Quantum many-body systems out of equilibrium represent a challenging frontier and have been shown to exhibit extremely rich phenomena. Recent experimental advances in building Noisy Intermediate-Scale Quantum (NISQ) devices have opened up a completely new territory in this context. The natural evolution implemented by NISQ devices is a quantum interactive dynamics generated by a combination of unitary gates and measurements. These platforms provide an opportunity to explore vastly larger parts of the Hilbert space and go beyond what can be realized in purely unitary systems. In pioneering works, an entanglement phase transition was identified in the dynamics of circuits of random unitary gates interleaved with local projective measurements. This phase transition separates a disentangling phase, obeying an area law, and an entangling phase obeying a volume law. Successively, it has been shown that additional phase transitions between different area phases can occur and new kinds of quantum phase transitions have been discovered. This session aims to give an overview of recent theoretical and experimental developments within this very active field and point towards the open questions.

Organized by Roderich Moesser (Dresden) and Frank Pollmann (München)

15:00 TT 17.1 Invited Talk: Quantum Mechanics and Many Body Games — •Shivaji Sondhi
15:30 TT 17.2 Invited Talk: Measurement induced phase transitions of fermions: from theory to observability — •Sebastian Diehl
16:00 TT 17.3 Invited Talk: Novel quantum dynamics with superconducting qubits — •Pedram Roushan
  16:30 TT 17.4 The contribution has been withdrawn.
16:45 TT 17.5 Topological quantum phase transitions in exact two-dimensional isometric tensor networks — •Yu-Jie Liu, Kirill Shtengel, and Frank Pollmann
17:00 TT 17.6 Quantum simulation of the 1D Fermi-Hubbard model as a Z2 lattice-gauge theory — •Uliana Khodaeva, Dmitry Kovrizhin, and Johannes Knolle
17:15 TT 17.7 Quantum control on MPS manifoldsMarko Ljubotina, •Elena Petrova, and Maksym Serbyn
17:30 TT 17.8 Non-interacting limit of the many-body mean level density as an indicator of integrable vs. chaotic single particle dynamics — •Georg Maier, Carolyn Echter, Juan-Diego Urbina, Caio Lewenkopf, and Klaus Richter
17:45 TT 17.9 Theory of Two-Dimensional Nonlinear Spectroscopy for Correlated Magnons in Three-Dimensional Canted Antiferromagnets — •Wonjune Choi, Daniel Schultz, Jonas Habel, Johannes Knolle, and Yong Baek Kim
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