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Laser Physics Letters

Strong dissipation induced coupling interaction between photons

Bin Chen, Hao Zhang, Qi-Ze Chen, Yuxiang Bian, Yan Xia

Published Oct 5, 2022• 0 citations
Publisher

Abstract

Abstract Dissipation is used to achieve the coupling interaction between different cavities connected by a low- Q cavity. When the dissipative rate of the central cavity is enough large, vacuum Rabi oscillation can be found. We obtain the noise spectrum which may show the unique dynamics character of the investigated system. Under the condition of strong dissipation, non-zero entanglement between photons may be observed. We also discuss the effect of thermal noise on the dynamic evolution. The work will be helpful for manipulating photonic state in noisy environment.

DOI
10.1088/1612-202x/ac9403

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Abstract Dissipation is used to achieve the coupling interaction between different cavities connected by a low- Q cavity. When the dissipative rate of the central cavity is enough large, vacuum Rabi oscillation can be found. We obtain the noise spectrum which may show the unique dynamics character of the investigated system. Under the condition of strong dissipation, non-zero entanglement between photons may be observed. We also discuss the effect of thermal noise on the dynamic evolution. The work will be helpful for manipulating photonic state in noisy environment.
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When an atom is strongly coupled to a cavity, the two systems can exchange a single photon through a coherent Rabi oscillation. This process enables precise quantum-state engineering and manipulation of atoms and photons in a cavity, which play a central role in quantum information and measurement. Recently, a new regime of cavity QED was reached experimentally where the strength of the interaction between light and artificial atoms (qubits) becomes comparable to the atomic transition frequency or the resonance frequency of the cavity mode. Here we show that this regime can strongly modify the concept of vacuum Rabi oscillations, enabling multiphoton exchanges between the qubit and the resonator. We find that experimental state-of-the-art circuit-QED systems can undergo two- and three-photon vacuum Rabi oscillations. These anomalous Rabi oscillations can be exploited for the realization of efficient Fock-state sources of light and complex entangled states of qubits.