Phys. Rev. A 82, 032102 (2010) [7 pages]Optical homodyne detection in view of the joint probability distributionReceived 9 July 2010; published 3 September 2010 Optical homodyne detection is examined in view of the joint probability distribution. The usual view is that the relative phase between independent laser fields is localized by photon-number measurements in interference experiments such as homodyne detection. This is why operationally coherent states for laser fields are used in the description of homodyne detection and optical quantum-state tomography. Here, we elucidate these situations by considering the joint probability distribution and the invariance of homodyne detection under the phase transformation of optical fields. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.82.032102
DOI:
10.1103/PhysRevA.82.032102
PACS:
03.65.Wj, 42.55.Ah, 03.65.Ta
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