Kerr-enhanced optomechanical entanglement generation via reservoir design

Abstract

Quantum entanglement is a crucial resource in quantum technologies, enabling advancements in quantum computing, quantum communication, and quantum precision measurement. Here, we propose a method to enhance optomechanical entanglement by introducing an optical Kerr nonlinear medium and a squeezed vacuum reservoir of the optomechanical cavity. By performing the displacement and squeezing transformations, the system can be reduced to a standard linearized optomechanical system with normalized driving detuning and linearized-coupling strength, in which the optical and mechanical modes are, respectively, coupled to an optical vacuum bath and a mechanical heat bath. We focus on the entanglement generation in the single stable regime of the system. By evaluating the steady-state logarithm negativity, we find that the optomechanical entanglement can be enhanced within a wide range of the Kerr constant. In addition, the Kerr nonlinearity can extend the stable region, enabling considerable entanglement generation in the blue-sideband parameter region. We also investigate the dependence of the entanglement generation on the average thermal phonon occupation of the mechanical bath and the optical driving amplitude. It is found that the presence of the Kerr nonlinearity allows the generation of optomechanical entanglement even when the thermal phonon occupation of the mechanical bath is as high as 3000. Our findings will provide valuable insights into enhancing fragile quantum resources in quantum systems.

13 pages, 7 figures

References in corpus (19)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Optomechanical entanglement between a movable mirror and a cavity field
• Observation of strong coupling between a micromechanical resonator and an optical cavity field
• Magnon Kerr effect in a strongly coupled cavity-magnon system
• Robust entanglement of a micromechanical resonator with output optical fields
• Multimode circuit optomechanics near the quantum limit
• Steady-state Mechanical Squeezing in an Optomechanical System via Duffing Nonlinearity
• Quantum limited amplification and entanglement in coupled nonlinear resonators
• Noise-Tolerant Optomechanical Entanglement via Synthetic Magnetism
• Bipartite and tripartite output entanglement in 3-mode optomechanical systems
• Quantum amplification and simulation of strong and ultrastrong coupling of light and matter
• Kerr enhanced backaction cooling in magnetomechanics
• Thermal-noise-resistant optomechanical entanglement via general dark-mode control
• Tripartite quantum entanglement with squeezed optomechanics
• Accelerated ground-state cooling of an optomechanical resonator via shortcuts to adiabaticity
• Optimal control of linear Gaussian quantum systems via quantum learning control
• Kerr-Enhanced Optical Spring
• Optimized mechanical quadrature squeezing beyond the 3-dB limit via a gradient-descent algorithm
• Kerr enhanced optomechanical cooling in the unresolved sideband regime

Cited by in corpus (1)

• Generation of large Fock states from coherent states using Kerr interaction and displacement