Coherent Perfect Absorption in Tavis-Cummings Models
- URL: http://arxiv.org/abs/2108.05917v1
- Date: Thu, 12 Aug 2021 18:39:13 GMT
- Title: Coherent Perfect Absorption in Tavis-Cummings Models
- Authors: Zibo Wang, Pawan Khatiwada, Dan Wang, and Imran M. Mirza
- Abstract summary: We study the conditions under which two laser fields can undergo Coherent Perfect Absorption (CPA)
We find that in the strong-coupling regime of cavity quantum electrodynamics, the strong DDI and the emitter-cavity detuning can act together to achieve the CPA.
Our CPA results are potentially applicable in building quantum memories that are an essential component in long-distance quantum networking.
- Score: 3.3726274202964635
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We theoretically study the conditions under which two laser fields can
undergo Coherent Perfect Absorption (CPA) when shined on a single-mode
bi-directional optical cavity coupled with two two- level quantum emitters
(natural atoms, artificial atoms, quantum dots, qubits, etc.). In addition to
being indirectly coupled through the cavity-mediated field, in our
Tavis-Cummings model the two quantum emitters (QEs) are allowed to interact
directly via the dipole-dipole interaction (DDI). Under the mean-field
approximation and low-excitation assumption, in this work, we particularly
focus on the impact of DDI on the existence of CPA in the presence of
decoherence mechanisms (spontaneous emission from the QEs and the leakage of
photons from the cavity walls). We also present a dressed-state analysis of the
problem to discuss the underlying physics related to the allowed polariton
state transitions in the Jaynes-Tavis-Cummings ladder. As a key result, we find
that in the strong-coupling regime of cavity quantum electrodynamics, the
strong DDI and the emitter-cavity detuning can act together to achieve the CPA
at two laser frequencies tunable by the inter-atomic separation which are not
possible to attain with a single QE in the presence of detuning. Our CPA
results are potentially applicable in building quantum memories that are an
essential component in long-distance quantum networking.
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