Quantum State Discrimination Using the Minimum Average Number of Copies

Sergei Slussarenko, Morgan M. Weston, Jun-Gang Li, Nicholas Campbell, Howard M. Wiseman, and Geoff J. Pryde
Phys. Rev. Lett. 118, 030502 – Published 20 January 2017; Erratum Phys. Rev. Lett. 118, 259901 (2017)
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Abstract

In the task of discriminating between nonorthogonal quantum states from multiple copies, the key parameters are the error probability and the resources (number of copies) used. Previous studies have considered the task of minimizing the average error probability for fixed resources. Here we introduce a new state discrimination task: minimizing the average resources for a fixed admissible error probability. We show that this new task is not performed optimally by previously known strategies, and derive and experimentally test a detection scheme that performs better.

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  • Received 25 May 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.030502

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Erratum

Erratum: Quantum State Discrimination Using the Minimum Average Number of Copies [Phys. Rev. Lett. 118, 030502 (2017)]

Sergei Slussarenko, Morgan M. Weston, Jun-Gang Li, Nicholas Campbell, Howard M. Wiseman, and Geoff J. Pryde
Phys. Rev. Lett. 118, 259901 (2017)

Authors & Affiliations

Sergei Slussarenko1, Morgan M. Weston1, Jun-Gang Li1,2, Nicholas Campbell1, Howard M. Wiseman1,*, and Geoff J. Pryde1,†

  • 1Centre for Quantum Dynamics and Centre for Quantum Computation and Communication Technology, Griffith University, Brisbane, Queensland 4111, Australia
  • 2School of Physics, Beijing Institute of Technology, Beijing 100081, China

  • *h.wiseman@griffith.edu.au
  • g.pryde@griffith.edu.au

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Issue

Vol. 118, Iss. 3 — 20 January 2017

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