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Article overview
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Sub-shot noise sensitivities without entanglement | Fabio Benatti
; Daniel Braun
; | Date: |
1 Sep 2011 | Abstract: | It is commonly maintained that entanglement is necessary to beat the shot
noise limit in the sensitivity with which certain parameters can be measured in
interferometric experiments. Here we show that, with a fluctuating number of
two-mode bosons, the shot-noise limit can be beaten by non-entangled bosonic
states with all bosons in one mode. For a given finite maximum number of
bosons, we calculate the optimal one- and two-mode bosonic states, and show
that in the absence of losses, NOON states are the optimal two-mode bosonic
states. | Source: | arXiv, 1109.0206 | Services: | Forum | Review | PDF | Favorites |
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