Research output per year
Research output per year
Dominic W. Berry^{*}, Howard M. Wiseman
Research output: Contribution to journal › Article › peer-review
We have previously 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 κ)-5 8 is possible, where κ is the linewidth of the beam resulting from the fluctuating phase. This is an improvement over the (N κ)-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.
Original language | English |
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Article number | 063824 |
Pages (from-to) | 1-13 |
Number of pages | 13 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 73 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2006 |
Externally published | Yes |
Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review