Phys. Rev. A 68, 050302(R) (2003) [4 pages]Continuous-variable quantum teleportation with a conventional laser
We give a description of balanced homodyne detection (BHD) using a conventional laser as a local oscillator (LO), where the laser field outside the cavity is a mixed state whose phase is completely unknown. We apply our description to continuous-variable quantum teleportation (CVQT) with a laser, and show that CVQT with a laser is valid only if the unknown phase of the laser field is shared among sender’s LOs, the EPR state, and receiver’s LO. We also propose a method to generate a strongly phase-correlated quantum state necessary for CVQT without an additional optical path. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.050302
DOI:
10.1103/PhysRevA.68.050302
PACS:
03.67.Hk, 03.65.Ud, 42.50.Dv
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