Cavity Induced Collective Behavior in the Polaritonic Ground State
- URL: http://arxiv.org/abs/2207.03436v2
- Date: Thu, 22 Dec 2022 17:04:17 GMT
- Title: Cavity Induced Collective Behavior in the Polaritonic Ground State
- Authors: V. Rokaj, S. I. Mistakidis and H. R. Sadeghpour
- Abstract summary: We investigate collective phenomena in a system of many particles in a harmonic trap coupled to a homogeneous quantum cavity field.
The cavity field mediates pairwise long-range interactions and enhances the effective mass of the particles.
The light-matter interaction also modifies the photonic properties of the polariton system, as the ground state is populated with bunched photons.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Cavity quantum electrodynamics provides an ideal platform to engineer and
control light-matter interactions with polariton quasiparticles. In this work,
we investigate collective phenomena in a system of many particles in a harmonic
trap coupled to a homogeneous quantum cavity field. The system couples
collectively to the cavity field, through its center of mass, and collective
polariton states emerge. The cavity field mediates pairwise long-range
interactions and enhances the effective mass of the particles. This leads to an
enhancement of localization in the matter ground state density, which features
a maximum when light and matter are on resonance, and demonstrates a
Dicke-like, collective behavior with the particle number. The light-matter
interaction also modifies the photonic properties of the polariton system, as
the ground state is populated with bunched photons. In addition, it is shown
that the diamagnetic $\mathbf{A}^2$ term is necessary for the stability of the
system, as otherwise the superradiant ground state instability occurs. We
demonstrate that coherent transfer of polaritonic population is possbile with
an external magnetic field and by monitoring the Landau-Zener transition
probability.
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