Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection

Shigenari Suzuki, Masahiro Takeoka, Masahide Sasaki, Ulrik L. Andersen, Fumihiko Kannari

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We present a simple protocol to purify a coherent-state superposition that has undergone a linear lossy channel. The scheme constitutes only a single beam splitter and a homodyne detector, and thus is experimentally feasible. In practice, a superposition of coherent states is transformed into a classical mixture of coherent states by linear loss, which is usually the dominant decoherence mechanism in optical systems. We also address the possibility of producing a larger amplitude superposition state from decohered states, and show that in most cases the decoherence of the states are amplified along with the amplitude.

Original languageEnglish
Article number042304
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume73
Issue number4
DOIs
Publication statusPublished - 2006

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purification
beam splitters
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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy(all)

Cite this

Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection. / Suzuki, Shigenari; Takeoka, Masahiro; Sasaki, Masahide; Andersen, Ulrik L.; Kannari, Fumihiko.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 73, No. 4, 042304, 2006.

Research output: Contribution to journalArticle

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