Macroscopic mechanical correlations using single-photon spatial compass state and operational Wigner distribution

Yong Meng Sua*, Kim Fook Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a measurement scheme for observing quantum correlations and entanglement in the spatial properties of two macroscopic mirrors. Two spatial versions of compass states are generated by using a single Gaussian mode of single photons in a simple interferometer. The chessboard pattern of spatial compass states reflects the spatial properties of a mirror composed of N quantum mirrors. The displacement and tilt correlations of the two mirrors are manifested by single photons and projection measurements through a measuring device which measures the propensities of the compass states. The technique can extract mechanical correlations of the two mirrors and lock them into the Einstein-Podolsky-Rosen (EPR) correlation. The criteria for EPR entanglement of these mirrors are then verified by sub-Planck structures in the propensity. We formulate the discrete-like property of the propensity, a demonstration of quantum jumps of EPR correlations in phase space, which, hence, enables discrete phase-space quantum computing and information processing.

Original languageEnglish (US)
Article number062113
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number6
DOIs
StatePublished - Jun 19 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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