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Ivan Savenko
복잡계 이론물리 연구단
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Photoinduced electric currents in Bose-Einstein condensates

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Title
Photoinduced electric currents in Bose-Einstein condensates
Author(s)
V. M. Kovalev; I. G. Savenko
Publication Date
2018-11
Journal
PHYSICAL REVIEW B, v.98, no.20, pp.201405 -
Publisher
AMER PHYSICAL SOC
Abstract
We calculate a light-induced electric current which can occur from a Bose-Einstein condensate under the action of an external electromagnetic field with the frequency exceeding the ionization potential of the bosons, taking a system of indirect excitons as a test bed. We show that the ionization can be accompanied by the excitation of collective Bogoliubov modes. As a result, the current consists of two principal components: one regular, which has a counterpart in bosonic systems in the normal phase, and the other one specific for condensates since the photoabsorption is mediated by the emission of Bogoliubov quasiparticles. Surprisingly, the latter component soon becomes predominant with the increase of light frequency above the ionization potential. ©2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/5094
ISSN
2469-9950
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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