TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.20.1.010
TI  - Out-of-equilibrium dynamical properties of Bose-Einstein condensates in a ramped up weak disorder
PY  - 2026/01/16
UR  - https://scipost.org/SciPostPhys.20.1.010
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 20
IS  - 1
SP  - 010
A1  - Lima, Rodrigo P. A.
AU  - Radonjić, Milan
AU  - Pelster, Axel
AB  - We theoretically study how the superfluid and condensate deformation of a weakly interacting ultracold Bose gas evolve during the ramp-up of an external weak disorder potential. Both resulting deformations turn out to consist of two distinct contributions, namely a reversible equilibrium one, already predicted by Huang and Meng in 1992, and a nonequilibrium dynamical one, whose magnitude depends on the details of the ramping protocol. For the specific case of the exponential ramp-up protocol, we are able to derive analytical time-dependent expressions for the above quantities. After a sufficiently long time, a steady state emerges that is generically out of equilibrium. We take the first step in investigating its properties by studying its relaxation dynamics. In addition, we analyze the two-time correlation function and elucidate its relation to the equilibrium and the dynamical part of the condensate deformation.
ER  -

@Article{10.21468/SciPostPhys.20.1.010,
	title={{Out-of-equilibrium dynamical properties of Bose-Einstein condensates in a ramped up weak disorder}},
	author={Rodrigo P. A. Lima and Milan Radonjić and Axel Pelster},
	journal={SciPost Phys.},
	volume={20},
	pages={010},
	year={2026},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.20.1.010},
	url={https://scipost.org/10.21468/SciPostPhys.20.1.010},
}