Steady states, squeezing, and entanglement in intracavity triplet down conversion

OPTICS COMMUNICATIONS

卷:484

Article

Denys, M. D. E.^1,2  Olsen, M. K.³  Trainor, L. S.^1,2  Schwefel, H. G. L.^1,2  Bradley, A. S.^1,2 

[1] Univ Otago, Dept Phys, Ctr Quantum Sci, Dunedin, New Zealand

[2] Dodd Walls Ctr Photon & Quantum Technol, Dunedin, New Zealand

[3] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

关键词: Squeezing;    Triplet;    Entanglement;    Intracavity;    Phase space;   

DOI  :  10.1016/j.optcom.2020.126699

来源: Elsevier

【 摘 要 】

Triplet down conversion, the process of converting one high-energy photon into three low-energy photons, may soon be experimentally feasible in the optical regime, due to advances in optical resonator technology. We use quantum phase-space techniques to analyze the process of degenerate intracavity triplet down conversion by solving stochastic differential equations within the truncated positive-P representation. We simulate the time evolution of both intracavity fields, and examine the resulting steady-states as a function of the pump intensity. Quantum effects are most pronounced in the region immediately above the semi-classical pumping threshold, where our numerical results differ significantly from semi-classical predictions. We calculate steady-state fluctuation spectra and identify regimes of squeezing, bipartite entanglement, and non-Gaussianity measurable in the cavity output fields. We also validate the truncated positive-P description against Monte Carlo wave function simulations, finding good agreement for low mode populations.

【 授权许可】

Free