Quantum correlations of localized atomic excitations in a disordered
atomic chain
- URL: http://arxiv.org/abs/2110.10979v1
- Date: Thu, 21 Oct 2021 08:49:08 GMT
- Title: Quantum correlations of localized atomic excitations in a disordered
atomic chain
- Authors: H. H. Jen
- Abstract summary: Atom-waveguide interface mediates significant and long-range light-matter interactions.
We theoretically investigate the excitation localization of atomic excitations under strong position disorders.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Atom-waveguide interface mediates significant and long-range light-matter
interactions through the guided modes. In this one-dimensional system, we
theoretically investigate the excitation localization of multiple atomic
excitations under strong position disorders. Deep in the localization side, we
obtain the time evolutions of quantum correlations via Kubo cumulant
expansions, which arise initially and become finite and leveled afterward,
overtaking the ones without disorders. This indicates two distinct regimes in
time: before the onset of excitation localization, the disorders engage the
disturbance of quantum correlations, which is followed by disorder-assisted
build-up of quantum correlations that maintain at a later stage owing to the
absence of excitations diffusion. The crossing of distinct regimes is pushed
further in time for longer-range correlations, which indicates a characteristic
timescale needed for disorders to sustain them. We also explore the effect of
directionality of couplings and resonant dipole-dipole interactions, which can
drive the system toward the delocalized side when it is under chiral couplings
or large dipole-dipole interaction strengths. The time-evolved quantum
correlations can give insights to the studies of few-body localization
phenomenon and nonequilibrium dynamics in open quantum systems.
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