Calibrated quantum thermometry in cavity optomechanics

Journal article (2019)

Authors

A. Chowdhury CNR-INO, Sezione di Firenze
P. Vezio European Laboratory for Non-linear Spectroscopy (LENS), Sezione di Firenze
M. Bonaldi Trento Institute for Fundamental Physics and Applications (INFN-TIFPA), Fondazione Bruno Kessler
A. Borrielli Fondazione Bruno Kessler, Trento Institute for Fundamental Physics and Applications (INFN-TIFPA)
F. Marino CNR-INO, Sezione di Firenze
B. Morana Fondazione Bruno Kessler, Electronic Components, Technology and Materials - EEMCS
G. Pandraud EKL Processing - EEMCS
Pasqualina M Sarro Electronic Components, Technology and Materials - EEMCS
E. Serra Electronic Components, Technology and Materials - EEMCS , Trento Institute for Fundamental Physics and Applications (INFN-TIFPA)
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Research Group
Electronic Components, Technology and Materials (EEMCS) (TU Delft)
Copyright: © 2019 A. Chowdhury, P. Vezio, M. Bonaldi, A. Borrielli, F. Marino, B. Morana, G. Pandraud, Pasqualina M Sarro, E. Serra, More Authors
DOI: https://doi.org/10.1088/2058-9565/ab05f1
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract

Cavity optomechanics has achieved the major breakthrough of the preparation and observation of macroscopic mechanical oscillators in non-classical states. The development of reliable indicators of the oscillator properties in these conditions is important also for applications to quantum technologies. We compare two procedures to infer the oscillator occupation number, minimizing the necessity of system calibrations. The former starts from homodyne spectra, the latter is based on the measurement of the motional sideband asymmetry in heterodyne spectra. Moreover, we describe and discuss a method to control the cavity detuning, that is a crucial parameter for the accuracy of the latter, intrinsically superior procedure.

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