Volume 107, Number 5, September 2014
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||05 September 2014|
Transmission of quantum entanglement through a random medium
1 Univ. Grenoble Alpes, LPMMC - F-38000 Grenoble, France
2 CNRS, LPMMC - F-38000 Grenoble, France
3 Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot and CNRS F-75205 Paris, France
Received: 27 June 2014
Accepted: 20 August 2014
We study the high-dimensional entanglement of a photon pair transmitted through a random medium. We show that multiple scattering in combination with the subsequent selection of only a fraction of outgoing modes reduces the average entanglement of an initially maximally entangled two-photon state. Entanglement corresponding to a random pure state is obtained when the number of modes accessible in transmission is much lower than the number of modes in the incident light. An amount of entanglement approaching that of the incident light can be recovered by accessing a larger number of transmitted modes. In contrast, a pair of photons in a separable state does not gain any entanglement when transmitted through a random medium.
PACS: 42.25.Dd – Wave propagation in random media / 42.50.-p – Quantum optics / 03.67.Bg – Entanglement production and manipulation
© EPLA, 2014
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