Quantum-limited estimation of continuous spontaneous localization

S. McMillen, M. Brunelli, M. Carlesso, A. Bassi, H. Ulbricht, M. G. A. Paris, and M. Paternostro
Phys. Rev. A 95, 012132 – Published 25 January 2017

Abstract

We apply the formalism of quantum estimation theory to extract information about potential collapse mechanisms of the continuous spontaneous localization (CSL) form. In order to estimate the strength with which the field responsible for the CSL mechanism couples to massive systems, we consider the optomechanical interaction between a mechanical resonator and a cavity field. Our estimation strategy passes through the probing of either the state of the oscillator or that of the electromagnetic field that drives its motion. In particular, we concentrate on all-optical measurements, such as homodyne and heterodyne measurements. We also compare the performances of such strategies with those of a spin-assisted optomechanical system, where the estimation of the CSL parameter is performed through time-gated spinlike measurements.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 15 July 2016
  • Revised 10 October 2016

DOI:https://doi.org/10.1103/PhysRevA.95.012132

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

S. McMillen1, M. Brunelli1, M. Carlesso2,3, A. Bassi2,3, H. Ulbricht4, M. G. A. Paris5,6, and M. Paternostro1

  • 1Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom
  • 2Department of Physics, University of Trieste, Strada Costiera 11, 34151 Trieste, Italy
  • 3Istituto nazionale di Fisica nucleare, Trieste Section, Via Valerio 2, 34127 Trieste, Italy
  • 4Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
  • 5Quantum Technology Lab, Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milano, Italy
  • 6InFn, Sezione di Milano, I-20133 Milano, Italy

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 95, Iss. 1 — January 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×