Hybrid Rotational Cavity Optomechanics Using Atomic Superfluid in a Ring

• URL: http://arxiv.org/abs/2407.01990v1
• Date: Tue, 2 Jul 2024 07:06:06 GMT
• Title: Hybrid Rotational Cavity Optomechanics Using Atomic Superfluid in a Ring
• Authors: Sanket Das, Pardeep Kumar, M. Bhattacharya, Tarak N. Dey,
• Abstract summary: We introduce a hybrid optomechanical system containing an annularly trapped Bose-Einstein condensate (BEC) inside an optical cavity driven by Lauguerre-Gaussian modes. We find that the trapped BEC's rotation reduces quantum fluctuations at the mirror's resonance frequency.
• Score: 0.6437261616511726
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We introduce a hybrid optomechanical system containing an annularly trapped Bose-Einstein condensate (BEC) inside an optical cavity driven by Lauguerre-Gaussian (LG) modes. Spiral phase elements serve as the end mirrors of the cavity such that the rear mirror oscillates torsionally about the cavity axis through a clamped support. As described earlier in a related system [P. Kumar et. al., Phys. Rev. Lett. 127, 113601 (2021)], the condensate atoms interact with the optical cavity modes carrying orbital angular momentum which create two atomic side modes. We observe three peaks in the output noise spectrum corresponding to the atomic side modes and rotating mirror frequencies, respectively. We find that the trapped BEC's rotation reduces quantum fluctuations at the mirror's resonance frequency. We also find that the atomic side modes-cavity coupling and the optorotational coupling can produce bipartite and tripartite entanglements between various constituents of our hybrid system. We reduce the frequency difference between the side modes and the mirror by tuning the drive field's topological charge and the condensate atoms' rotation. When the atomic side modes become degenerate with the mirror, the stationary entanglement between the cavity and the mirror mode diminishes due to the suppression of cooling. Our proposal, which combines atomic superfluid circulation with mechanical rotation, provides a versatile platform for reducing quantum fluctuations and producing macroscopic entanglement with experimentally realizable parameters.

Related papers

• Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
  We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide. When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits. We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
  arXiv  Detail & Related papers  (2024-08-30T15:54:33Z)
• Bilateral photon emission from a vibrating mirror and multiphoton entanglement generation [1.0595929844849483]
  Entanglement plays a crucial role in the development of quantum-enabled devices. In this study, we explore a cavity resonator containing a two-sided perfect mirror. We study $2n$-photon entanglement generation and bilateral photon pair emission.
  arXiv  Detail & Related papers  (2024-02-06T19:21:42Z)
• Dissipative and dispersive cavity optomechanics with a frequency-dependent mirror [0.0]
  microcavity-based optomechanical systems are placed in the unresolved-sideband regime, preventing sideband-based ground-state cooling. We analyze such an optomechanical system, whereby one of the mirrors is strongly frequency-dependent, i.e., a suspended Fano mirror. We formulate a quantum-coupled-mode description that includes both the standard dispersive optomechanical coupling as well as dissipative coupling.
  arXiv  Detail & Related papers  (2023-11-26T14:20:25Z)
• Quantum field heat engine powered by phonon-photon interactions [58.720142291102135]
  We present a quantum heat engine based on a cavity with two oscillating mirrors. The engine performs an Otto cycle during which the walls and a field mode interact via a nonlinear Hamiltonian.
  arXiv  Detail & Related papers  (2023-05-10T20:27:15Z)
• Controlling mode orientations and frequencies in levitated cavity optomechanics [0.0]
  coherent-scattering (CS) set-up allows quantum ground state cooling of a levitated nanoparticles. We demonstrate experimentally that it is possible to strongly cavity cool and control the em unperturbed modes. Findings have implications for directional force sensing using CS set-ups.
  arXiv  Detail & Related papers  (2022-04-20T17:07:31Z)
• Coherent Resonant Coupling between Atoms and a Mechanical Oscillator Mediated by Cavity-Vacuum Fluctuations [3.403770702932551]
  We show that an atom can be coupled to a mechanical oscillator via quantum vacuum fluctuations of a cavity field. In a hybrid quantum system consisting of a cavity resonator with a movable mirror and an atom, these processes are dominated by two pair-creation mechanisms.
  arXiv  Detail & Related papers  (2022-04-18T10:00:45Z)
• Probing Strong Coupling between a Microwave Cavity and a Spin Ensemble with Raman Heterodyne Spectroscopy [0.0]
  Raman heterodyne spectroscopy is used to probe an isotopically purified ensemble of erbium dopants. Because the erbium electron spin transition is strongly coupled to the microwave cavity, we observed Raman heterodyne signals at the resonant frequencies of the hybrid spin-cavity modes.
  arXiv  Detail & Related papers  (2021-05-12T01:14:39Z)
• Tuning the mode-splitting of a semiconductor microcavity with uniaxial stress [49.212762955720706]
  In this work we use an open microcavity composed of a "bottom" semiconductor distributed Bragg reflector (DBR) incorporating an n-i-p heterostructure. We demonstrate a reversible in-situ technique to tune the mode-splitting by applying uniaxial stress to the semiconductor DBR. A thorough study of the mode-splitting and its tuning across the stop-band leads to a quantitative understanding of the mechanism behind the results.
  arXiv  Detail & Related papers  (2021-02-18T13:38:32Z)
• Multimode-polariton superradiance via Floquet engineering [55.41644538483948]
  We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density of excitation of the atomic cloud.
  arXiv  Detail & Related papers  (2020-11-24T19:00:04Z)
• Collective spontaneous emission of two entangled atoms near an oscillating mirror [50.591267188664666]
  We consider the cooperative spontaneous emission of a system of two identical atoms, interacting with the electromagnetic field in the vacuum state. Using time-dependent theory, we investigate the spectrum of the radiation emitted by the two-atom system. We show that it is modulated in time, and that the presence of the oscillating mirror can enhance or inhibit the decay rate.
  arXiv  Detail & Related papers  (2020-10-07T06:48:20Z)
• Optical Magnetometer: Quantum Resonances at pumping repetition rate of 1/n of the Larmor frequency [58.720142291102135]
  Quantum sub-resonances at a repetition rate of $1/n$ of the Larmor frequency of the magnetic field inside the shield are experimentally observed and theoretically explained. Investigations in single alkali atoms cells as well as mixed alkali atoms of K and Rb are presented.
  arXiv  Detail & Related papers  (2020-02-20T09:14:56Z)

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.