Physics – Quantum Physics
Scientific paper
2003-12-15
Phys. Rev. A, Vol. 70, 012103 (2004)
Physics
Quantum Physics
Journal reference added. Material added
Scientific paper
10.1103/PhysRevA.70.012103
Interferometry of single particles with internal degrees of freedom is investigated. We discuss the interference patterns obtained when an internal state evolution device is inserted into one or both the paths of the interferometer. The interference pattern obtained is not uniquely determined by the completely positive maps (CPMs) that describe how the devices evolve the internal state of a particle. By using the concept of gluing of CPMs, we investigate the structure of all possible interference patterns obtainable for given trace preserving internal state CPMs. We discuss what can be inferred about the gluing, given a sufficiently rich set of interference experiments. It is shown that the standard interferometric setup is limited in its abilities to distinguish different gluings. A generalized interferometric setup is introduced with the capacity to distinguish all gluings. We also connect to another approach using the well known fact that channels can be realized using a joint unitary evolution of the system and an ancillary system. We deduce the set of all such unitary `representations' and relate the structure of this set to gluings and interference phenomena.
No associations
LandOfFree
Operations and single particle interferometry 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 Operations and single particle interferometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operations and single particle interferometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-102814