Effects of Quadratic Optomechanical Coupling on Bipartite Entanglements, Mechanical Ground-State Cooling and Squeezing in an Electro-Optomechanical System

• URL: http://arxiv.org/abs/2408.06365v2
• Date: Sat, 21 Dec 2024 11:24:32 GMT
• Title: Effects of Quadratic Optomechanical Coupling on Bipartite Entanglements, Mechanical Ground-State Cooling and Squeezing in an Electro-Optomechanical System
• Authors: N. Ghorbani, Ali Motazedifard, M. H. Naderi,
• Abstract summary: We study the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system. Such a hybrid electro-optomechanical system can serve as a promising platform to engineer an improved entangled source for quantum sensing as well as quantum information processing.
• Score: 0.0
• License:
• Abstract: We theoretically investigate the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system where a moving membrane is linearly coupled to the microwave field mode of an LC circuit, while it simultaneously interacts both linearly and quadratically with the radiation pressure of a single-mode optical cavity. We show that by choosing a suitable sign and amplitude for the quadratic optomechanical coupling (QOC), one can achieve enhanced and thermally robust stationary bipartite entanglement between the subsystems, improved mechanical ground-state cooling, and Q-quadrature squeezing of the mechanical mode beyond the 3-dB limit of squeezing. In particular, we find that in the presence of QOC with negative sign and in the resolved sideband regime the bipartite optical-mechanical entanglement can be increased by about 2 order of magnitude around the temperature of 1mK, and it can be preserved against thermal noise up to the ambient temperature of 0.1K. Furthermore, the QOC with positive sign can give rise to the enhancement of the mechanical ground-state cooling by about 1 order of magnitude in the optical and microwave red-detuned regime. We also find that for the positive sign of QOC and near the microwave resonance frequency the squeezing degree of the Q-quadrature of the mechanical mode can be amplified up to 15 dB. Such a hybrid electro-optomechanical system can serve as a promising platform to engineer an improved entangled source for quantum sensing as well as quantum information processing.

Related papers

• Tunable anharmonicity in cavity optomechanics in the unresolved sideband regime [0.0]
  We present a theory that predicts the measurable signatures left by the mechanical anharmonicity. In particular, we obtain analytically and numerically the mechanical displacement spectrum, and explore the imprints of the mechanical anharmonicity on the cavity light field.
  arXiv  Detail & Related papers  (2025-01-15T16:21:21Z)
• Strong coupling at room temperature with a centimeter-scale quartz crystal [0.0]
  We report an optomechanical system with independent control over pumping power and frequency detuning to achieve and characterize the strong-coupling regime of a bulk acoustic-wave resonator. Our results provide valuable insights into the performances of room-temperature macroscopic mechanical systems and their applications in hybrid quantum devices.
  arXiv  Detail & Related papers  (2024-05-28T12:15:05Z)
• In-situ-tunable spin-spin interactions in a Penning trap with in-bore optomechanics [41.94295877935867]
  We present an optomechanical system for in-situ tuning of the coherent spin-motion and spin-spin interaction strength. We characterize the system using measurements of the induced mean-field spin precession. These experiments show approximately a $times2$ variation in the ratio of the coherent to incoherent interaction strength.
  arXiv  Detail & Related papers  (2024-01-31T11:00:39Z)
• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Unconditional Wigner-negative mechanical entanglement with linear-and-quadratic optomechanical interactions [62.997667081978825]
  We propose two schemes for generating Wigner-negative entangled states unconditionally in mechanical resonators. We show analytically that both schemes stabilize a Wigner-negative entangled state that combines the entanglement of a two-mode squeezed vacuum with a cubic nonlinearity. We then perform extensive numerical simulations to test the robustness of Wigner-negative entanglement attained by approximate CPE states stabilized in the presence of thermal decoherence.
  arXiv  Detail & Related papers  (2023-02-07T19:00:08Z)
• Strong mechanical squeezing in a microcavity with double quantum wells [0.0]
  In a hybrid quantum system composed of two quantum wells placed inside a cavity with a moving end mirror pumped by bichromatic coherent light, we address the formation of squeezed states of a mechanical resonator. We show that the robustness of this squeezing against thermal fluctuations is important for practical applications of such systems.
  arXiv  Detail & Related papers  (2023-02-01T16:00:55Z)
• Phononically shielded photonic-crystal mirror membranes for cavity quantum optomechanics [48.7576911714538]
  We present a highly reflective, sub-wavelength-thick membrane resonator featuring high mechanical quality factor. We construct a Fabry-Perot-type optical cavity, with the membrane forming one terminating mirror. We demonstrate optomechanical sideband cooling to mK-mode temperatures, starting from room temperature.
  arXiv  Detail & Related papers  (2022-12-23T04:53:04Z)
• Mechanical Squeezing in Quadratically-coupled Optomechanical Systems [0.0]
  We demonstrate the generation of a strong mechanical squeezing in a dissipative optomechanical system. Even for a thermal occupancy of 104 phonons, mechanical squeezing beyond 3 dB and a strong optomechanical entanglement is observed.
  arXiv  Detail & Related papers  (2022-10-02T13:13:37Z)
• Capacitively coupled distinct mechanical resonators for room temperature phonon-cavity electromechanics [4.0571196985616425]
  We present a room temperature phonon-cavity electromechanical system, consisting of two distinct resonators. We demonstrate electromechanically induced transparency and amplification in a two-tone driving scheme. Our results open up new possibilities in the study of phonon-cavity based signal processing in the classical and potentially in the future in the quantum regimes.
  arXiv  Detail & Related papers  (2022-04-10T09:55:07Z)
• Open-cavity in closed-cycle cryostat as a quantum optics platform [47.50219326456544]
  We present a fiber-based open Fabry-P'erot cavity in a closed-cycle cryostat exhibiting ultra-high mechanical stability. This set of results manifests open-cavity in a closed-cycle cryostat as a versatile and powerful platform for low-temperature cavity QED experiments.
  arXiv  Detail & Related papers  (2021-03-09T18:41:48Z)
• Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
  We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
  arXiv  Detail & Related papers  (2020-07-04T11:02:20Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.