[institut] [phys4phys] SCL online seminar: Milan Radonjic, Thursday, 18 February, 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, 18 February 2021 at 14:00 on Zoom (link is given below). The talk entitled

Non-equilibrium evolution of Bose-Einstein condensate deformation in temporally controlled weak disorder

will be given by Dr. Milan Radonjić (Scientific Computing Laboratory, Center for the Study of Complex Systems, Institute of Physics Belgrade and Department of Physics, TU Kaiserslautern, Germany). Abstract of the talk:

In this talk we will consider a time-dependent extension of a perturbative mean-field approach to the homogeneous dirty boson problem by investigating how switching on and off a weak disorder potential affects the stationary state of an initially equilibrated Bose-Einstein condensate by the emergence of a disorder-induced condensate deformation. In the switch-on scenario, we will study if the stationary condensate deformation turns out to be a sum of an equilibrium part [1], that actually corresponds to adiabatically switching on the disorder, and a dynamically-induced part, where the latter depends on the particular driving protocol [2]. If the disorder is switched off afterwards, we will find out if the resulting condensate deformation acquires an additional dynamically-induced part in the long-time limit, and what happens with the equilibrium part. We will also present an appropriate generalization to inhomogeneous trapped condensates. Our results demonstrate that the condensate deformation represents an indicator of the generically non-equilibrium nature of steady states of a Bose gas in a temporally controlled weak disorder. 

[1] K. Huang and H.-F. Meng, Phys. Rev. Lett. 69, 644 (1992)
[2] Milan Radonjić and Axel Pelster, SciPost Phys. 10, 008 (2021)

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Time: Feb 18, 2021 14:00 Belgrade
https://us02web.zoom.us/j/83982872129?pwd=UUhLNXlldkVvUDU5djR5a1BTaEdJZz09

Meeting ID: 839 8287 2129
Passcode: 529607
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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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