Single-Phonon Addition and Subtraction to a Mechanical Thermal State

Abstract

Adding or subtracting a single quantum of excitation to a thermal state of a bosonic system has the counter-intuitive effect of approximately doubling its mean occupation. We perform the first experimental demonstration of this effect outside optics by implementing single-phonon addition and subtraction to a thermal state of a mechanical oscillator via Brillouin optomechanics in an optical whispering-gallery microresonator. Using a detection scheme that combines single-photon counting and optical heterodyne detection, we observe this doubling of the mechanical thermal fluctuations to a high precision. The capabilities of this joint click-dyne detection scheme adds a significant new dimension for optomechanical quantum science and applications.

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• Cross-Polarized Stimulated Brillouin Scattering in Lithium Niobate Waveguides
• Giant photoelasticity of polaritons for detection of coherent phonons in a superlattice with quantum sensitivity
• Quantum metrology with a continuous-variable system
• Second-Order Coherence Across the Brillouin Lasing Threshold
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• Theoretical framework for enhancing or enabling cooling of a mechanical resonator via the anti-Stokes or Stokes interaction and zero-photon detection
• Enhanced Laser Cooling of a Mechanical Resonator via Zero-Photon Detection
• Measuring High-Order Phonon Correlations in an Optomechanical Resonator