Optical Implementation of Quantum Orienteering

Evan R. Jeffrey, Joseph B. Altepeter, Madalina Colci, and Paul G. Kwiat
Phys. Rev. Lett. 96, 150503 – Published 20 April 2006; Erratum Phys. Rev. Lett. 99, 089902 (2007)

Abstract

We present results from an optical implementation of quantum orienteering, a protocol for communicating directions in space using quantum bits. We show how different types of measurements and encodings can be used to increase the communication efficiency. In particular, if Alice and Bob use two spin-1/2 particles for communication and employ joint measurements, they do better than is possible with local operations and classical communication. Furthermore, by using oppositely oriented spins, the achievable communication efficiency is further increased. Finally, we discuss the limitations of an optical approach: our results highlight the usually overlooked nonequivalence of different physical encodings of quantum bits.

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  • Received 29 August 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.150503

©2006 American Physical Society

Erratum

Erratum: Optical Implementation of Quantum Orienteering [Phys. Rev. Lett. 96, 150503 (2006)]

Evan R. Jeffrey, Joseph B. Altepeter, Madalina Colci, and Paul G. Kwiat
Phys. Rev. Lett. 99, 089902 (2007)

Authors & Affiliations

Evan R. Jeffrey, Joseph B. Altepeter, Madalina Colci, and Paul G. Kwiat

  • Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080, USA

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Issue

Vol. 96, Iss. 15 — 21 April 2006

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