Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock

Details Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock

2010-04-10

arxiv.org/abs/1004.1725v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

We study experimentally the lifetime of a special class of entangled states in an atomic clock, squeezed spin states. In the presence of anisotropic noise, their lifetime is strongly dependent on squeezing orientation. We measure the Allan deviation spectrum of a clock operated with a phase-squeezed input state. For integration times up to 50 s the squeezed clock achieves a given precision 2.8(3) times faster than a clock operating at the standard quantum limit.

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