| Description |
Alessandro Foligno
(University of Nottingham)
Abstract: Quantum circuits have recently gained popularity as analytically treatable systems which work as effective models to study chaotic many body systems; in particular Dual Unitary systems have been used to access quantities usually hard to study such as OTOCS, entanglement growth after a quench, spectral form factors and many others. The peculiarity of Dual Unitary systems is that they display the fastest possible spreading of information, with both the butterfly and entanglement velocity being equal to the speed of light.
In this talk, I will present a work [1] where we studied a generalization of the Dual Unitary class that was recently introduced in [2], showing that within this class there are examples of non-maximal spreading of information, while still preserving some solvability of the model and allowing in particular for the exact calculation of the so-called membrane tension, a quantity that characterizes the dynamics in chaotic many-body systems. |
CMSP Seminar (Joint ICTP/SISSA Statistical Physics):Quantum information spreading in generalised dual-unitary circuits
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