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Environment-induced entanglement with a single photon

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 نشر من قبل Malena Hor-Meyll
 تاريخ النشر 2009
  مجال البحث فيزياء
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 تأليف Malena Hor-Meyll




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We propose an all-optical setup, which couples different degrees of freedom of a single photon, to investigate entanglement generation by a common environment. The two qubits are represented by the photon polarization and Hermite-Gauss transverse modes, while the environment corresponds to the photon path. For an initially two-qubit separable state, the increase of entanglement is analyzed, as the probability of an environment-induced transition ranges from zero to one. An entanglement witness that is invariant throughout the evolution of the system yields a direct measurement of the concurrence of the two-qubit state.



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