Optical continuous-variable qubit

Jonas S. Neergaard-Nielsen, Makoto Takeuchi, Kentaro Wakui, Hiroki Takahashi, Kazuhiro Hayasaka, Masahiro Takeoka, Masahide Sasaki

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

In a new branch of quantum computing, information is encoded into coherent states, the primary carriers of optical communication. To exploit it, quantum bits of these coherent states are needed, but it is notoriously hard to make superpositions of such continuous-variable states. We have realized the complete engineering and characterization of a qubit of two optical continuous-variable states. Using squeezed vacuum as a resource and a special photon-subtraction technique, we could with high precision prepare an arbitrary superposition of squeezed vacuum and a squeezed single photon. This could lead the way to demonstrations of coherent state quantum computing.

Original languageEnglish
Article number053602
JournalPhysical review letters
Volume105
Issue number5
DOIs
Publication statusPublished - 2010 Jul 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Optical continuous-variable qubit'. Together they form a unique fingerprint.

Cite this