Enhanced Squeezing in an Optically Bistable Two-Photon Medium

P. Galatola, L. A. Lugiato, M. Vadacchino +1 more

Wang Kaige, P. Galatola, Luigi A. Lugiato +3 more

Christopher C. Gerry, Edwin E. Hach

Christopher C. Gerry, Stanley Rodrigues

We use a numerical technique to study the time development of squeezing and antibunching resulting from the interaction of coherent light with a two-photon medium. While we find that enhanced squeezing occurs for short time, the squeezing is eventually revoked. We also find that antibunching develops but also is eventually revoked.

Christopher C. Gerry, Edward R. Vrscay

The time evolution of squeezed vacuum states, taken to be SU(1,1) coherent states, interacting with a two-photon medium is examined using numerical methods. The non-photon-conserving medium is modeled by a Hamiltonian which consists of the free-field term, a non-photon-conserving term in the form of a degenerate parametric amplifier, and an anharmonic term which gives rise to optical bistability. This system has previously been shown to produce enhanced squeezing when interacting with ordinary coherent light. In the present work we find that the squeezing property is generally revoked by the anharmonic term and increased by the nonconserving term. The combined effects are not additive, however, and a quantum interference effect is observed in the calculations.

Surabhi Yadav, Vijay Bhatt, Aranya B. Bhattacherjee +1 more

We theoretically investigate optical bistability and entanglement in a hybrid nonlinear system of two coupled cavities via a single-mode waveguide. The left cavity contains an ensemble of N quantum dots (QDs) and a Kerr medium to enhance the nonlinearity as it causes to observe the bistable behaviour of the system. We study the Kerr medium, QD ensemble, and cavity coupling effect on bistability response shown by mean intracavity photons in the left cavity. In addition, we have shown entanglement between different subsystems and found that entanglement can be generated between the two coupled cavity photons, cavity photons, and QD ensembles. Additionally, we investigate the effect of different parameters on entanglement. Our findings show that Kerr nonlinearity and the hopping parameter between the two cavities can effectively control the optical properties of the proposed hybrid system, which can be used to design efficient optical devices and the entangled optical photons have applications such as quantum information transfer.