Criteria for generalized macroscopic and mesoscopic quantum coherence
| dc.creator | Cavalcanti, E. G. | |
| dc.creator | Reid, M. D. | |
| dc.date | 2008-06-03 | |
| dc.date.accessioned | 2026-07-07T10:36:25Z | |
| dc.date.available | 2026-07-07T10:36:25Z | |
| dc.description | We consider macroscopic, mesoscopic and "S-scopic" quantum superpositions of eigenstates of an observable, and develop some signatures for their existence. We define the extent, or size $S$ of a superposition, with respect to an observable \hat{x}, as being the range of outcomes of \hat{x} predicted by that superposition. Such superpositions are referred to as generalized $S$-scopic superpositions to distinguish them from the extreme superpositions that superpose only the two states that have a difference $S$ in their prediction for the observable. We also consider generalized $S$-scopic superpositions of coherent states. We explore the constraints that are placed on the statistics if we suppose a system to be described by mixtures of superpositions that are restricted in size. In this way we arrive at experimental criteria that are sufficient to deduce the existence of a generalized $S$-scopic superposition. The signatures developed are useful where one is able to demonstrate a degree of squeezing. We also discuss how the signatures enable a new type of Einstein-Podolsky-Rosen gedanken experiment. | |
| dc.description | 15 pages, accepted for publication in Phys. Rev. A | |
| dc.identifier | https://arxiv.org/abs/0806.0457 | |
| dc.identifier | http://arxiv.org/abs/0806.0457 | |
| dc.identifier | Phys. Rev. A 77, 062108 (2008) | |
| dc.identifier | doi:10.1103/PhysRevA.77.062108 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/180047 | |
| dc.subject | Quantum Physics | |
| dc.title | Criteria for generalized macroscopic and mesoscopic quantum coherence | |
| dc.type | text |