Quantum limits and symphotonic states in free-mass gravitational-wave antennae

Details Quantum limits and symphotonic states in free-mass gravitational-wave antennae Quantum limits and symphotonic states in free-mass gravitational-wave antennae

1998-06-24

arxiv.org/abs/quant-ph/9806081v2

Phys.Lett. A246 (1998) 485-497

Physics

Quantum Physics

21 pages, 2 figures

Scientific paper

10.1016/S0375-9601(98)00537-4

Quantum mechanics sets severe limits on the sensitivity and required circulating energy in traditional free-mass gravitational-wave antennas. One possible way to avoid these restrictions is the use of intracavity QND measurements. We analyze a new QND observable, which possesses a number of features that make it a promising candidate for such measurements and propose a practical scheme for the realization of this measurement. In combination with an advanced coordinate meter, this scheme makes it possible to lower substantially the requirements on the circulating power.

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