Reversing the weak quantum measurement for a photonic qubit

Yong Su Kim, Young Wook Cho, Young Sik Ra, Yoon Ho Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate the conditional reversal of a weak quantum measurement on a photonic qubit. The state recovery fidelity, determined by quantum process tomography, is shown to be over 94% for partial-collapse strength up to 0.9. We also experimentally study information gain due to the weak measurement and discuss the role of the reversing operation as an information erasure.

Original languageEnglish
Title of host publicationQuantum Electronics and Laser Science Conference, QELS 2010
Publication statusPublished - 2010
EventQuantum Electronics and Laser Science Conference, QELS 2010 - San Jose, CA, United States
Duration: 2010 May 162010 May 21

Publication series

NameOptics InfoBase Conference Papers
ISSN (Electronic)2162-2701

Other

OtherQuantum Electronics and Laser Science Conference, QELS 2010
CountryUnited States
CitySan Jose, CA
Period10/5/1610/5/21

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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