Adaptive phase measurements for narrowband squeezed beams
| dc.creator | Berry, Dominic W. | |
| dc.creator | Wiseman, Howard M. | |
| dc.date | 2006-03-22 | |
| dc.date.accessioned | 2026-07-07T07:08:05Z | |
| dc.date.available | 2026-07-07T07:08:05Z | |
| dc.description | We have previously [Phys. Rev. A 65, 043803 (2002)] analyzed adaptive measurements for estimating the continuously varying phase of a coherent beam, and a broadband squeezed beam. A real squeezed beam must have finite photon flux N and hence can be significantly squeezed only over a limited frequency range. In this paper we analyze adaptive phase measurements of this type for a realistic model of a squeezed beam. We show that, provided it is possible to suitably choose the parameters of the beam, a mean-square phase uncertainty scaling as (N/kappa)^{-5/8} is possible, where kappa is the linewidth of the beam resulting from the fluctuating phase. This is an improvement over the (N/kappa)^{-1/2} scaling found previously for coherent beams. In the experimentally realistic case where there is a limit on the maximum squeezing possible, the variance will be reduced below that for coherent beams, though the scaling is unchanged. | |
| dc.description | 13 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0603189 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0603189 | |
| dc.identifier | Phys. Rev. A 73, 063824 (2006) | |
| dc.identifier | doi:10.1103/PhysRevA.73.063824 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/110626 | |
| dc.subject | Quantum Physics | |
| dc.title | Adaptive phase measurements for narrowband squeezed beams | |
| dc.type | text |