Motional Squashed States

Details Motional Squashed States Motional Squashed States

1999-11-15

arxiv.org/abs/quant-ph/9911069v1

J. Opt. B: Quantum Semiclass. Opt. 2, 190 (2000)

Physics

Quantum Physics

8 pages, 2 figures, to appear in the special Issue "Quantum Correlations and Fluctuations" of J. Opt. B

Scientific paper

10.1088/1464-4266/2/2/322

We show that by using a feedback loop it is possible to reduce the fluctuations in one quadrature of the vibrational degree of freedom of a trapped ion below the quantum limit. The stationary state is not a proper squeezed state, but rather a ``squashed'' state, since the uncertainty in the orthogonal quadrature, which is larger than the standard quantum limit, is unaffected by the feedback action.

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