Coherent perfect absorption in Tavis-Cummings models

Area of Science:

• Quantum Optics
• Cavity Quantum Electrodynamics
• Quantum Information Science

Background:

• Coherent Perfect Absorption (CPA) is a phenomenon where incident light is completely absorbed.
• Optical cavities coupled with quantum emitters are fundamental in quantum optics.
• Dipole-dipole interaction (DDI) between quantum emitters influences their collective behavior.

Purpose of the Study:

• To theoretically investigate the conditions for CPA in a system of two quantum emitters coupled to an optical cavity.
• To analyze the impact of direct dipole-dipole interaction (DDI) between emitters on CPA.
• To explore the role of decoherence mechanisms and cavity detuning in achieving CPA.

Main Methods:

• Theoretical study using a Tavis-Cummings model.
• Application of mean-field approximation and low-excitation assumption.
• Dressed-state analysis to understand polariton transitions.

Main Results:

• Strong DDI and emitter-cavity detuning enable CPA at two laser frequencies in the strong-coupling regime.
• These frequencies are tunable by the inter-atomic separation.
• Achieving CPA with two emitters is possible even with detuning, unlike with a single emitter.

Conclusions:

• The interplay of strong DDI and cavity detuning is key to achieving tunable CPA.
• This phenomenon offers a pathway for developing advanced quantum memories.
• The findings have implications for long-distance quantum networking.