Reliability of the beamsplitter based Bell-state measurement

Yoon Ho Kim, Warren P. Grice

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A linear 50/50 beamsplitter, together with a coincidence measurement, has been widely used in quantum optical experiments, such as teleportation, dense coding, etc., for interferometrically distinguishing, measuring, or projecting onto one of the four two-photon polarization Bell-states |ψ (-)〉. In this paper, we demonstrate that the coincidence measurement at the output of a beamsplitter cannot be used as an absolute identifier of the input state |ψ(-)〉 nor as an indication that the input photons have projected to the |(-)〉 state.

Original languageEnglish
Title of host publication2005 Quantum Electronics and Laser Science Conference (QELS)
Pages1132-1134
Number of pages3
StatePublished - 2005
Event2005 Quantum Electronics and Laser Science Conference (QELS) - Baltimore, MD, United States
Duration: May 22 2005May 27 2005

Publication series

NameQuantum Electronics and Laser Science Conference (QELS)
Volume2

Conference

Conference2005 Quantum Electronics and Laser Science Conference (QELS)
Country/TerritoryUnited States
CityBaltimore, MD
Period05/22/0505/27/05

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