Interconvertibility of single-rail optical qubits


Autoria(s): Berry, Dominic W.; Lvovsky, A. I.; Sanders, Barry C.
Contribuinte(s)

Anthony J. Campillo

Data(s)

01/01/2006

Resumo

We show how to convert between partially coherent superpositions of a single photon with the vacuum by using linear optics and postselection based on homodyne measurements. We introduce a generalized quantum efficiency for such states and show that any conversion that decreases this quantity is possible. We also prove that our scheme is optimal by showing that no linear optical scheme with generalized conditional measurements, and with one single-rail qubit input, can improve the generalized efficiency. (c) 2006 Optical Society of America.

Identificador

http://espace.library.uq.edu.au/view/UQ:80229

Idioma(s)

eng

Publicador

Optical Society of America

Palavras-Chave #Photon #State #C1 #240499 Optical Physics not elsewhere classified #780102 Physical sciences
Tipo

Journal Article