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.

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Time: May 23, 2024 14:00 Belgrade

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Meeting ID: 891 4912 4050
Passcode: 412239
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