Room-temperature Mechanical Resonator with a Single Added or Subtracted Phonon

• URL: http://arxiv.org/abs/2102.04017v1
• Date: Mon, 8 Feb 2021 06:14:00 GMT
• Title: Room-temperature Mechanical Resonator with a Single Added or Subtracted Phonon
• Authors: Rishi N. Patel, Timothy P. McKenna, Zhaoyou Wang, Jeremy D. Witmer, Wentao Jiang, Rapha\"el Van Laer, Christopher J. Sarabalis, and Amir H. Safavi-Naeini
• Abstract summary: A room-temperature mechanical oscillator undergoes thermal Brownian motion with an amplitude much larger than the amplitude associated with a single phonon of excitation. This motion can be read out and manipulated using laser light using a cavity-optomechanical approach.
• Score: 1.606071974243323
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A room-temperature mechanical oscillator undergoes thermal Brownian motion with an amplitude much larger than the amplitude associated with a single phonon of excitation. This motion can be read out and manipulated using laser light using a cavity-optomechanical approach. By performing a strong quantum measurement, i.e., counting single photons in the sidebands imparted on a laser, we herald the addition and subtraction of single phonons on the 300K thermal motional state of a 4GHz mechanical oscillator. To understand the resulting mechanical state, we implement a tomography scheme and observe highly non-Gaussian phase-space distributions. Using a maximum likelihood method, we infer the density matrix of the oscillator and confirm the counter-intuitive doubling of the mean phonon number resulting from phonon addition and subtraction.

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