منابع مشابه
On Entanglement of Mesoscopic Systems
The entanglement of clouds of N=1011 atoms recently experimentally verified is expressed in terms of the fluctuation algebra introduced by Verbeure et al. A mean field hamiltonian describing the coupling to a laser beam leads to different time evolutions if considered on microscopic or mesoscopic operators. Only the latter creates non trivial correlations that finally after a measurement lead t...
متن کاملExperimental entanglement distillation of mesoscopic quantum states
Ruifang Dong, Mikael Lassen, 2 Joel Heersink, Christoph Marquardt, Radim Filip, 3 Gerd Leuchs, and Ulrik L. Andersen 2 Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky-Str. 1, 91058, Erlangen, Germany Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby, Denmark Department of Optics, Palacký...
متن کاملMesoscopic entanglement of noninteracting qubits using collective spontaneous emission
We describe anexperimentally straightforward method for preparing an entangled W state of at least 100 qubits. Our repeat-until-success protocol relies on detection of single photons from collective spontaneous emission in free space. Our method allows entanglement preparation in a wide range of qubit implementations that lack entangling qubit–qubit interactions. We give detailed numerical exam...
متن کاملPhoton-induced Entanglement of Distant Mesoscopic Squid Rings
An experiment that involves two distant mesoscopic SQUID rings is studied. The superconducting rings are irradiated with correlated photons, which are produced by a single microwave source. Classically correlated (separable) and quantum mechanically correlated (entangled) microwaves are considered, and their effect on the Josephson currents is quantified. It is shown that the currents tunnellin...
متن کاملLong-lived mesoscopic entanglement outside the Lamb-Dicke regime.
We create entangled states of the spin and motion of a single 40Ca+ ion in a linear ion trap. We theoretically study and experimentally observe the behavior outside the Lamb-Dicke regime, where the trajectory in phase space is modified and the motional coherent states become squeezed. We directly observe the modification of the return time of the trajectory, and infer the squeezing. The mesosco...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2002
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.66.052304