Quantum correlations beyond entanglement in a double-cavity opto-mechanical system
arXiv:1512.02435 · doi:10.1142/S0219749915500410
Abstract
In this paper we investigate the robustness of the quantum correlations against the environment effects in various opto-mechanical bipartite systems. For two spatially separated opto-mechanical cavities, we give analytical formula for the global covariance matrix involving two mechanical modes and two optical modes. The logarithmic negativity as an indicator of the degree of entanglement and the Gaussian quantum discord which is a witness of quantumness of correlations are used as quantifiers to evaluate the different pairwise quantum correlations in the whole system. The evolution of the quantum correlations existing in this opto-mechanical system are analyzed in terms of the thermal bath temperature, squeezing parameter and the opto-mechanical cooperativity. We find that with desirable choice of these parameters, it is possible either enhance or annihilate the quantum correlations in the system. Various scenarios are discussed in detail.
17 pages
References in corpus (8)
- Optomechanical entanglement between a movable mirror and a cavity field
- Observation of strong coupling between a micromechanical resonator and an optical cavity field
- Self-cooling of a micro-mirror by radiation pressure
- State Transfer Between a Mechanical Oscillator and Microwave Fields in the Quantum Regime
- Creating and probing macroscoping entanglement with light
- Steady state entanglement in the mechanical vibrations of two dielectric membranes
- Optical wavelength conversion of quantum states with optomechanics
- Dynamic entanglement transfer in a double-cavity optomechanical system
Cited by in corpus (6)
- Quantum discord and its allies: a review
- Controlling Stationary One-Way Steering via Thermal Effects in Optomechanics
- Enhancing quantum correlations and entanglement in an optomechanical system via cross-Kerr nonlinearity
- Creating mirror-mirror quantum correlations in optomechanics
- Dynamical Gaussian quantum steering in optomechanics
- Non-classical correlations in a two-mode optomechanical system