Leggett-Garg tests of macrorealism for bosonic systems including double-well Bose-Einstein condensates and atom interferometers

L. Rosales-Zárate, B. Opanchuk, Q. Y. He, and M. D. Reid
Phys. Rev. A 97, 042114 – Published 19 April 2018

Abstract

We construct quantifiable generalizations of Leggett-Garg tests for macro- and mesoscopic realism and noninvasive measurability that apply when not all outcomes of measurement can be identified as arising from one of two macroscopically distinguishable states. We show how quantum mechanics predicts a negation of the Leggett-Garg premises for strategies involving ideal negative-result, weak, and minimally invasive (“nonclumsy”) projective measurements on dynamical entangled systems, as might be realized with Bose-Einstein condensates in a double-well potential, path-entangled NOON states, and atom interferometers. Potential loopholes associated with each strategy are discussed.

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  • Received 15 December 2016
  • Revised 16 December 2017

DOI:https://doi.org/10.1103/PhysRevA.97.042114

©2018 American Physical Society

Physics Subject Headings (PhySH)

General Physics

Authors & Affiliations

L. Rosales-Zárate1,2, B. Opanchuk1, Q. Y. He3, and M. D. Reid1

  • 1Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne 3122, Australia
  • 2Centro de Investigaciones en Óptica A.C., León, Guanajuato 37150, Mexico
  • 3State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

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Issue

Vol. 97, Iss. 4 — April 2018

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