Remote Macroscopic Entanglement on a Photonic Crystal Architecture

Abstract

The outstanding progress in nanostructure fabrication and cooling technologies allows what was unthinkable a few decades ago: bringing single-mode mechanical vibrations to the quantum regime. The coupling between photon and phonon excitations is a natural source of nonclassical states of light and mechanical vibrations, and its study within the field of cavity optomechanics is developing lightning-fast. Photonic crystal cavities are highly integrable architectures that have demonstrated the strongest optomechanical coupling to date, and should therefore play a central role for such hybrid quantum state engineering. In this context, we propose a realistic heralding protocol for the on-chip preparation of remotely entangled mechanical states, relying on the state-of-the-art optomechanical parameters of a silicon-based nanobeam structure. Pulsed sideband excitation of a Stokes process, combined with single photon detection, allows writing a delocalised mechanical Bell state in the system, signatures of which can then be read out in the optical field. A measure of entanglement in this protocol is provided by the visibility of a characteristic quantum interference pattern in the emitted light.

8 pages, 5 Figures

References in corpus (8)

• Optomechanical entanglement between a movable mirror and a cavity field
• Single-photon Optomechanics
• Optimized optomechanical crystal cavity with acoustic radiation shield
• Steady state entanglement in the mechanical vibrations of two dielectric membranes
• Optomechanical position detection enhanced by de-amplification using intracavity squeezing
• Quantum State Orthogonalization and a Toolset for Quantum Optomechanical Phonon Control
• Heralded Preparation and Readout of Entangled Phonons in a Photonic Crystal Cavity
• 2D photonic-crystal optomechanical nanoresonator

Cited by in corpus (4)

• Entanglement Generation Between Two Mechanical Resonators in Two Optomechanical Cavities
• Pulsed quantum interaction between two distant mechanical oscillators
• Enhancement of Opto-Electro-Mechanical Entanglement through Three-Level Atoms
• Optimized design of a Silica encapsulated photonic crystal nanobeam cavity for integrated Silicon-based nonlinear and quantum photonics