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Article Dans Une Revue EPL - Europhysics Letters Année : 2013

Limit of spin squeezing in trapped Bose-Einstein condensates

Alice Sinatra
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Yvan Castin

Résumé

The evolution of an interacting two-component Bose-Einstein condensate from an initial phase state leads to a spin squeezed state that may be used in atomic clocks to increase the signal-to-noise ratio, opening the way to quantum metrology. The efficiency of spin squeezing is limited by the finite temperature of the gas, as was shown theoretically in a spatially homogeneous system. Here we determine the limit of spin squeezing in the realistic trapped case, with classical field simulations, and with a completely analytical treatment that includes the quantum case.
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Dates et versions

hal-00796178 , version 1 (01-03-2013)
hal-00796178 , version 2 (10-06-2013)

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Alice Sinatra, Yvan Castin, Emilia Witkowska. Limit of spin squeezing in trapped Bose-Einstein condensates. EPL - Europhysics Letters, 2013, 102, pp.40001. ⟨10.1209/0295-5075/102/40001⟩. ⟨hal-00796178v2⟩
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