Dual Quantum Nondemolition Measurements via Successive Soliton Collisions

Stephen R. Friberg, Takaaki Mukai, and Susumu Machida
Phys. Rev. Lett. 84, 59 – Published 3 January 2000

Abstract

Quantum mechanics allows quantum nondemolition (QND) variables to be measured without being changed. This requires QND variables to be initially in an eigenstate and measurement backaction noise to be directed into conjugate variables. Experimental demonstrations thus require two measurements: the first to collapse variables toward an eigenstate and the second to show results identical to the first. Here, we report results from two successive soliton-collision QND measurements that optical correlation measurements show to be nearly identical.

  • Received 12 May 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.59

©2000 American Physical Society

Authors & Affiliations

Stephen R. Friberg1, Takaaki Mukai1, and Susumu Machida2

  • 1NTT Basic Research Laboratories, 3-1 Morinosato-Wakamiya Atsugi, Kanagawa, 243-0198, Japan
  • 2Yamamoto Quantum Fluctuation Project, JST 3-9-11 Midori-cho, Musashino-shi, Tokyo, 180-0012, Japan

Issue

Vol. 84, Iss. 1 — 3 January 2000

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