On the number of Bose-selected modes in driven-dissipative ideal Bose gases

Physical Review. E
Alexander SchnellAndré Eckardt

Abstract

In an ideal Bose gas that is driven into a steady state far from thermal equilibrium, a generalized form of Bose condensation can occur. Namely, the single-particle states unambiguously separate into two groups: the group of Bose-selected states, whose occupations increase linearly with the total particle number, and the group of all other states whose occupations saturate [Phys. Rev. Lett. 111, 240405 (2013)PRLTAO0031-900710.1103/PhysRevLett.111.240405]. However, so far very little is known about how the number of Bose-selected states depends on the properties of the system and its coupling to the environment. The answer to this question is crucial since systems hosting a single, a few, or an extensive number of Bose-selected states will show rather different behavior. While in the former two scenarios each selected mode acquires a macroscopic occupation, corresponding to (fragmented) Bose condensation, the latter case rather bears resemblance to a high-temperature state of matter. In this paper, we systematically investigate the number of Bose-selected states, considering different classes of the rate matrices that characterize the driven-dissipative ideal Bose gases in the limit of weak system-bath coupling. These include ra...Continue Reading

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Citations

Sep 11, 2019·Physical Review. E·Onno R DiermannMartin Holthaus
Nov 28, 2019·Scientific Reports·Onno R Diermann, Martin Holthaus
Oct 2, 2021·Nature Communications·Mario VretenarJan Klaers

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