Generation of mechanical interference fringes by multi-photon counting

Abstract

Exploring the quantum behaviour of macroscopic objects provides an intriguing avenue to study the foundations of physics and to develop a suite of quantum-enhanced technologies. One prominent path of study is provided by quantum optomechanics which utilizes the tools of quantum optics to control the motion of macroscopic mechanical resonators. Despite excellent recent progress, the preparation of mechanical quantum superposition states remains outstanding due to weak coupling and thermal decoherence. Here we present a novel optomechanical scheme that significantly relaxes these requirements allowing the preparation of quantum superposition states of motion of a mechanical resonator by exploiting the nonlinearity of multi-photon quantum measurements. Our method is capable of generating non-classical mechanical states without the need for strong single photon coupling, is resilient against optical loss, and offers more favourable scaling against initial mechanical thermal occupation than existing schemes. Moreover, our approach allows the generation of larger superposition states by projecting the optical field onto NOON states. We experimentally demonstrate this multi-photon-counting technique on a mechanical thermal state in the classical limit and observe interference fringes in the mechanical position distribution that show phase superresolution. This opens a feasible route to explore and exploit quantum phenomena at a macroscopic scale.

16 pages, 4 figures. v1: submitted for review on 28 Jan 2016. v2: significantly revised manuscript. v3: some further revisions and some extra results included. v3: new results added, extra author added, close to published version, supplementary material available with published version

References in corpus (14)

• Remote quantum entanglement between two micromechanical oscillators
• Entangled massive mechanical oscillators
• Cavity Opto-Mechanics with a Bose-Einstein Condensate
• Non-classical correlations between single photons and phonons from a mechanical oscillator
• Experimental nonclassicality of single-photon-added thermal light states
• Hanbury Brown and Twiss interferometry of single phonons from an optomechanical resonator
• High quality mechanical and optical properties of commercial silicon nitride membranes
• Macroscopic Quantum Superposition in Cavity Optomechanics
• Nonlinear cavity optomechanics with nanomechanical thermal fluctuations
• Creating and Verifying a Quantum Superposition in a Micro-optomechanical System
• Quantum nondemolition measurement of mechanical squeezed state beyond the 3 dB limit
• Quantum State Orthogonalization and a Toolset for Quantum Optomechanical Phonon Control
• Measurement-induced macroscopic superposition states in cavity optomechanics
• Towards Optomechanical Quantum State Reconstruction of Mechanical Motion

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