Genoni, MG;
Zhang, J;
Millen, J;
Barker, PF;
Serafini, A;
(2015)
Quantum cooling and squeezing of a levitating nanosphere via time-continuous measurements.
New Journal of Physics
, 17
, Article 073019. 10.1088/1367-2630/17/7/073019.
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Abstract
With the purpose of controlling the steady state of a dielectric nanosphere levitated within an optical cavity, we study its conditional dynamics under simultaneous sideband cooling and additional timecontinuous measurement of either the output cavity mode or the nanosphere’s position. We find that the average phonon number, purity and quantum squeezing of the steady-states can all be made more non-classical through the addition of time-continuous measurement.Wepredict that the continuous monitoring of the system, together with Markovian feedback, allows one to stabilize the dynamics for any value of the laser frequency driving the cavity. By considering state of the art values of the experimental parameters, we prove that one can in principle obtain a non-classical (squeezed) steady state with an average phonon number nph ≈ 0.5.
| Type: | Article |
|---|---|
| Title: | Quantum cooling and squeezing of a levitating nanosphere via time-continuous measurements |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1367-2630/17/7/073019 |
| Publisher version: | http://dx.doi.org/10.1088/1367-2630/17/7/073019 |
| Additional information: | © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| Keywords: | quantum feedback control, quantum optomechanics, quantum state engineering |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1473515 |
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