Physics – Quantum Physics
Scientific paper
2010-07-03
Phys. Rev. A 82, 012117 (2010)
Physics
Quantum Physics
Scientific paper
The positive operator valued measure (POVM) for a photon counting array detector is derived and found to equal photon flux density integrated over pixel area and measurement time. Since photon flux density equals number density multiplied by the speed of light, this justifies theoretically the observation that a photon counting array provides a coarse grained measurement of photon position. The POVM obtained here can be written as a set of projectors onto a basis of localized states, consistent with the description of photon position in a recent quantum imaging proposal [M. Tsang, Phys. Rev. Lett. \textbf{102}, 253601 (2009)]. The wave function that describes a photon counting experiment is the projection of the photon state vector onto this localized basis. Collapse is to the electromagnetic vacuum and not to a localized state, thus violating the text book rules of quantum mechanics but compatible with the theory of generalized observables and the nonlocalizability of an incoming photon.
No associations
LandOfFree
Photon position measure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photon position measure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photon position measure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-402326