Exceptional points in oligomer chains
- URL: http://arxiv.org/abs/2112.04305v1
- Date: Wed, 8 Dec 2021 14:32:37 GMT
- Title: Exceptional points in oligomer chains
- Authors: C. A. Downing and V. A. Saroka
- Abstract summary: We provide a quantum theory which describes the non-Hermitian physics of chains of coupled modes.
Our results provide perspectives for the experimental detection of parity-time symmetric phases in one-dimensional arrays of quantum objects.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Symmetry underpins our understanding of physical law. Open systems, those in
contact with their environment, can provide a platform to explore parity-time
symmetry. While classical parity-time symmetric systems have received a lot of
attention, especially because of the associated advances in the generation and
control of light, there is much more to be discovered about their quantum
counterparts. Here we provide a quantum theory which describes the
non-Hermitian physics of chains of coupled modes, which has applications across
optics and photonics. We elucidate the origin of the exceptional points which
govern the parity-time symmetry, survey their signatures in quantum transport,
study their influence for correlations, and account for long-range
interactions. We also find how the locations of the exceptional points evolve
as a function of the chain length and chain parity, capturing how an arbitrary
oligomer chain transitions from its unbroken to broken symmetric phase. Our
general results provide perspectives for the experimental detection of
parity-time symmetric phases in one-dimensional arrays of quantum objects, with
consequences for light transport and its degree of coherence.
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