Phonon counting thermometry of an ultracoherent membrane resonator near its motional ground state
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- optica-7-6-718
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The generation of non-Gaussian quantum states of macroscopic mechanical objects is key to a number of challenges in quantum information science, ranging from fundamental tests of decoherence to quantum communication and sensing. Heralded generation of single-phonon states of mechanical motion is an attractive way toward this goal, as it is, in principle, not limited by the object size. Here we demonstrate a technique that allows for generation and detection of a quantum state of motion by phonon counting measurements near the ground state of a 1.5 MHz micromechanical oscillator. We detect scattered photons from a membrane-in-the-middle optomechanical system using an ultra-narrowband optical filter, and perform Raman-ratio thermometry and second-order intensity interferometry near the motional ground state ((n) over bar = 0.23 +/- 0.02 phonons). With an effective mass in the nanogram range, our system lends itself for studies of long-lived non-Gaussian motional states with some of the heaviest objects to date. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Originalsprog | Engelsk |
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Tidsskrift | Optica |
Vol/bind | 7 |
Udgave nummer | 6 |
Sider (fra-til) | 718-725 |
Antal sider | 8 |
ISSN | 2334-2536 |
DOI | |
Status | Udgivet - 20 jun. 2020 |
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