Coherent perfect absorption in a quantum nonlinear regime of cavity quantum electrodynamics

Wei, Yang-hua; Gu, Wen-ju; Yang, Guoqing; Zhu, Yanyan; Li, Gao‐xiang

doi:10.1103/physreva.97.053825

Cited by 19 publications

(13 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The output fields from the left and right sides of the cavity can be deduced through the following input-output relations [47,62,63,66]:…”

Section: Cpa In Linear Regimementioning

confidence: 99%

Broadband coherent perfect absorption by cavity coupled to three-level atoms in linear and nonlinear regimes

Wang

et al. 2021

New J. Phys.

View full text Add to dashboard Cite

A broadband coherent perfect absorption (CPA) scheme consisting of an optical resonator coupled with three-level atoms excited by single cavity mode is proposed and analyzed. We show the output light field from the system is completely suppressed under specific conditions when the system is excited in linear and nonlinear regimes by two identical light fields from two ends of optical cavity. An analytical broadband CPA criterion for central and sideband excitations of cavity quantum electrodynamics (CQED) system is derived in linear regime. Moreover, we show the resonant excitation criterion for CPA is greatly extended in nonlinear regime. A new type of bistability behavior is found. The output field intensity and the bistability curve can be well tuned by dynamically adjusting system parameters. Our results demonstrate that the CPA is quite universal, and it should be useful in a variety of applications in optical logic and optical communication devices.

show abstract

“…The output fields from the left and right sides of the cavity can be deduced through the following input-output relations [47,62,63,66]:…”

Section: Cpa In Linear Regimementioning

confidence: 99%

Broadband coherent perfect absorption by cavity coupled to three-level atoms in linear and nonlinear regimes

Wang

et al. 2021

New J. Phys.

View full text Add to dashboard Cite

show abstract

“…In order to meet the conditions of pseudo-Hermiticity of the Hamiltonian, the cavity with gain is needed. We can achieve it by weakly driven the nanofiber cavity to achieve coherent perfect absorption (CPA) [48]. Besides the second-order exceptional points (EP 2 ), the EP 3 can also be found in our system.…”

Section: Introductionmentioning

confidence: 89%

High-order exceptional point in a nanofiber cavity quantum electrodynamics system

Li¹,

Li²,

Zhang³

2022

Preprint

View full text Add to dashboard Cite

We present an all-fiber emitter-cavity quantum electrodynamics (QED) system which consists of two twolevel emitters and a nanofiber cavity. Our scheme makes it possible to observe the higher-order exceptional points based on the coupling between the emitters and the nanofiber cavity. The effective gain of this cavity can be obtained by weakly driven to the nanofiber cavity via two identical laser fields, which will realize coherent perfect absorption (CPA) in the implementation of the experiments. Under the experimental feasible parameters, the Hamiltonian of this system is in the condition of pseudo-Hermiticity, which means that its eigenvalues can be made of one real and a pair of complex conjugates, or be all real. By controllably tuned the ratio of the two emitter-cavity coupling strengths, and the ratio of the decay rates of the emitters, we can discover both the three-order exceptional point (EP3) and the second-order exceptional point (EP2) without parity-time symmetry in our emitter-cavity system. These results can also be demonstrated by the total output spectra and transmission spectra. We also find that the symmetric modes come into being when the coupling strength greater than the critical coupling strength at EP3 points. Our proposal will provide a new method to realize higher-order exceptional points based on the quantum network.

show abstract

“…Generally, the CPA occurs only within the certain frequency range when the atom-cavity system is determined [13,14,22]. For example, in the two-level atom-cavity system [13], dual-frequency CPA modes at ∆ p = ±4.5Γ are attained for a given input intensity |a in | 2 ≈ 55 (∆ p is the frequency detuning of the probe field, and Γ is the decay rate of atomic excited level).…”

Section: Introductionmentioning

confidence: 99%

Controllable optical bistability with perfect photon absorption

Guo

2021

Preprint

View full text Add to dashboard Cite

We propose a scheme for controlling nonlinear coherent perfect absorption (CPA) in a three-level Λ-type atom-cavity system. Generally, the normally nonlinear CPA and the bistable CPA can be attained at the different frequencies of an input probe field. With a coherent control field coupling one of the ground states and the excited state of the atoms, two types of CPA can be attained at the same frequency. Besides, for the bistable CPA, the highest output-input ratio of the high stable state and the low stable state is approximately 1, and the bistable region is controllable with the control field. The controllable bistable CPA may have potential applications in optical bistable switching and optical logic devices.

show abstract

Coherent perfect absorption in a quantum nonlinear regime of cavity quantum electrodynamics

Cited by 19 publications

References 54 publications

Broadband coherent perfect absorption by cavity coupled to three-level atoms in linear and nonlinear regimes

Broadband coherent perfect absorption by cavity coupled to three-level atoms in linear and nonlinear regimes

High-order exceptional point in a nanofiber cavity quantum electrodynamics system

Controllable optical bistability with perfect photon absorption

Contact Info

Product

Resources

About