[phys4phys] SCL online seminar: Milan Radonjic, Thursday, 11 May, 14:00

[Antun Balaz]

Dear colleagues,

You are cordially invited to the SCL online seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 11 Mary 2023 at 14:00 on Zoom (link is given below). The talk entitled

Out of equilibrium dynamical properties of Bose-Einstein condensates in ramped up weak disorder

will be given by Dr. Milan Radonjić ((SCL, Institute of Physics Belgrade; Institute of Theoretical Physics, University of Hamburg, Germany). The abstract of the talk:

In this talk we will discuss, from the theoretical point of view, how the superfluid and the condensate deformation of a weakly interacting ultracold Bose gas evolve during the ramping up of an external weak disorder potential. Both resulting deformations turn out to consist of two distinct contributions, i.e., a reversible equilibrium one [1,2], as well as a non-equilibrium dynamical one, whose magnitude depends on the details of the ramping protocol [3]. For the specific case of the exponential ramping up protocol, we will derive analytic time-dependent expressions for the aforementioned quantities. After sufficiently long time, the steady state emerges that is generically out of equilibrium. We will discuss how to examine properties of such a state by studying the relaxation dynamics into it. Also, we will consider the two-time correlation function and elucidate its relation to the equilibrium and the dynamical part of the condensate deformation.

[1] K. Huang and H.-F. Meng, Phys. Rev. Lett. 69, 644 (1992).
[2] B. Nagler, M. Radonjić et al., New J. Phys. 22, 033021 (2020).
[3] M. Radonjić and A. Pelster, SciPost Phys. 10, 008 (2021).

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Time: May 11, 2023 14:00 Belgrade

Join Zoom Meeting
https://us02web.zoom.us/j/83199062589?pwd=akdNeklLTHI1dVlKMlNEQjY3OTRyQT09

Meeting ID: 831 9906 2589
Passcode: 402537
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Best regards,
Antun Balaž

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Dr. Antun Balaž
Research Professor

http://www.scl.rs/antun
Phone: +381 11 3713152
Fax: +381 11 3162190

Scientific Computing Laboratory
Center for the Study of Complex Systems

Institute of Physics Belgrade
National Institute of the Republic of Serbia
Pregrevica 118, 11080 Belgrade, Serbia
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