22,490 research outputs found
Scheme for preparation of mulipartite entanglement of atomic ensembles
We describe an experimental scheme of preparing multipartite W class of
maximally entangled states between many atomic ensembles. The scheme is based
on laser manipulation of atomic ensembles and single-photon detection, and well
fits the status of the current experimental technology. In addition, we show
one of the applications of the kind of W class states, teleporting an entangled
state of atomic ensembles with unknown coefficients to more than one distant
parties, either one of which equally likely receives the transmitted state.Comment: 4 pages, 3 figure
Non-spectator Contributions To The Lifetime of
In this work, we evaluate the contributions of non-spectator effects to the
lifetimes of and B-mesons. Based on the well-established models and
within a reasonable range of the concerned parameters, the contributions can
reduce the lifetime of by compared to that of B-mesons
which are not significantly affected. This might partly explain the measured
ratio \cite{Data}, which has been a
long-standing discrepancy between theory and experimental data
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