Rotational mirror–mirror entanglement via dissipative atomic reservoir in a double-Laguerre–Gaussian-cavity system

Abstract

We propose a new scheme to prepare macroscopic entanglement between two rotating mirrors using dissipative atomic reservoir in a double-Laguerre-Gaussian-cavity (DLGC) system. The two-level atomic system driven by a strong field, acts as a single pathway of Bogoliubov dissipation to push the two original cavity modes into the desirable entangled state under the near-resonant conditions. Successively, the photon-photon entanglement can be transferred to mirror-mirror entanglement through the exchange of orbital angular momentum. In essence, the macroscopic entanglement is originated from the dissipative atomic reservoir rather than the radiation torque, thereby it is usually robust against environmental noises. The present scheme provides a feasible way to realize stable entanglement between spatially separated mirrors with high capacity, which may find potential applications in remote quantum communications.

Nonreciprocal macroscopic tripartite entanglement in atom-optomagnomechanical system

“…And the nonlocal correlation of macroscopic objects can be widely used in large-scale fundamental testing of quantum mechanics, quantum to classical transitions, and building more powerful sensing, communication, processing, and storage devices [18][19][20]. In cavity optomechanics, significant progress has been made in the study of macroscopic entanglement via the optomechanical radiation pressure [21], where the entanglements of two distant macroscopic mechanical resonators and between the massive mechanical oscillator and the electromagnetic field or collective atomic spin oscillator have been reported [22][23][24][25][26]. Apart from the optomechanical system, cavity magnonics has gradually become an advantageous platform for studying macroscopic quantum entanglement [9,10].…”

Enhanced Entanglement and Controlling Quantum Steering in a Laguerre–Gaussian Cavity Optomechanical System with Two Rotating Mirrors

“…[56,57] Furthermore, researchers used a hybrid rotational system to study OMIT, [58][59][60][61][62] cooling of rotating mirrors, [63] and entanglement. [64][65][66][67] Most recently, there is an interesting study by Huang et al, in which they proposed an LG cavity optomechanical scheme, assisted with an optical parametric amplifier (OPA). [68] They used the pump frequency of the OPA which is double the frequency of the anti-Stokes field generated by the external laser beam interacting with both rotating mirrors.…”

Enhancing the Steady-State Entanglement between a Laguerre–Gaussian-Cavity Mode and a Rotating Mirror via Cross-Kerr Nonlinearity

“…In the past two decades, optomechanical systems, in which a cavity field is coupled with a macroscopic mechanical oscillator via linear momentum transfer, have been proven to be a promising platform on which to prepare macroscopic entanglement [5] because the linear vibration of the mechanical oscillator can, experimentally, be cooled down close to its quantum ground state [6,7]. Meanwhile, Laguerre-Gaussian-(LG)-cavity optomechanical systems have been intensively studied [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In these, an LG-cavity mode is coupled to a rotating mirror due to the orbital angular momentum transfer from the LG-cavity mode to the rotating mirror.…”

“…It has been shown that it is also possible to cool down the rotational motion of a macroscopic mirror close to its quantum ground state [8]. Thus, it is possible to observe a variety of nonlinear and quantum phenomena in such systems, including optomechanically induced transparency [9][10][11][12], optomechanically induced amplification [13], Fano resonance [14], fast and slow light [11,14], optical sum-sideband generation [15], second-order sideband effects [16], entanglement between an LG-cavity mode and a rotating mirror [17,18], stationary entanglement between two rotating mirrors [19,20], and tripartite entanglement between an LG-cavity mode, a magnon mode, and a phonon mode [21].…”