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복잡계 이론물리 연구단
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Partial quantum revivals of localized condensates in distorted lattices

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Title
Partial quantum revivals of localized condensates in distorted lattices
Author(s)
Dogyun Ko; Meng Sun; Alexei Andreanov; Y. G. Rubo; I. G. Savenko
Publication Date
2020-03
Journal
OPTICS LETTERS, v.45, no.6, pp.1571 - 1574
Publisher
OPTICAL SOC AMER
Abstract
We report on a peculiar propagation of bosons loaded by a short Laguerre–Gaussian pulse in a nearly flat band of a lattice potential. Taking a system of exciton polaritons in a kagome lattice as an example, we show that an initially local- ized condensate propagates in a specific direction in space, if anisotropy is taken into account. This propagation consists of quantum jumps, collapses, and revivals of the whole com- pact states, and it persists given any direction of anisotropy. This property reveals its signatures in the tight-binding model, and, surprisingly, it is much more pronounced in a continuous model. Quantum revivals are robust to the repulsive interaction and finite lifetime of the particles. Since no magnetic field or spin–orbit interaction is required, this system provides a new kind of easily implementable optical logic. ©2020 Optical Society of America
URI
https://pr.ibs.re.kr/handle/8788114/7149
ISSN
0146-9592
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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