SCL Online Seminar by Doron Cohen

You are cordially invited to the SCL online seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 23 May 2024 at 14:00 on Zoom (the link is given below). The talk entitled

Quantum irreversibility

will be given by Prof. Doron Cohen, (Physics Department, Ben-Gurion University, Israel). The abstract of the talk:

Quantum mechanically, a driving process is expected to be reversible in the quasistatic limit, also known as the adiabatic theorem. This statement stands in opposition to classical mechanics, where a mix of regular and chaotic dynamics implies irreversibility. A paradigm for demonstrating the signatures of chaos in quantum irreversibility is a sweep process whose objective is to transfer condensed bosons from a source orbital. In this talk we will show that such a protocol is dominated by an interplay of adiabatic-shuttling and chaos-assisted depletion processes [1]. The latter is implied by interaction terms that spoil the Bogoliubov integrability of the Hamiltonian. As the sweep rate is lowered, a crossover to a regime that is dominated by quantum fluctuations is encountered, featuring a breakdown of quantum-to-classical correspondence. The major aspects of this picture are not captured by the common two-orbital approximation, which implies failure of the familiar many-body Landau-Zener paradigm.

[1] Y. Winsten and D. Cohen, Phys. Rev. A 107 (2023) 052202.

Time: May 23, 2024 14:00 Belgrade

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