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Reconfiguration of quantum states in ℘T-symmetric quasi-one-dimensional lattices

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Title
Reconfiguration of quantum states in ℘T-symmetric quasi-one-dimensional lattices
Author(s)
Jung-Wan Ryu; Nojoon Myoung; Hee Chul Park
Publication Date
2017-08
Journal
SCIENTIFIC REPORTS, v.7, no.1, pp.8746
Publisher
NATURE PUBLISHING GROUP
Abstract
We demonstrate mesoscopic transport through quantum states in quasi-1D lattices maintaining the combination of parity and time-reversal symmetries by controlling energy gain and loss. We investigate the phase diagram of the non-Hermitian system where transitions take place between unbroken and broken ℘T-symmetric phases via exceptional points. Quantum transport in the lattice is measured only in the unbroken phases in the energy band-but not in the broken phases. The broken phase allows for spontaneous symmetry-broken states where the cross-stitch lattice is separated into two identical single lattices corresponding to conditionally degenerate eigenstates. These degeneracies show a lift-up in the complex energy plane, caused by the non-Hermiticity with ℘T-symmetry. © 2017 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/3866
DOI
10.1038/s41598-017-09410-y
ISSN
2045-2322
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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