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Entanglement protection of high-dimensional states by adaptive optics

: Sorelli, G.; Leonhard, N.; Shatokhin, V.N.; Reinlein, C.; Buchleitner, A.

Fulltext ()

New journal of physics. Online journal 21 (2019), No.2, Art. 023003, 14 pp.
ISSN: 1367-2630
Deutsche Forschungsgemeinschaft DFG
DFG BU1337/17-1
Journal Article, Electronic Publication
Fraunhofer IOF ()

We theoretically study the potential of adaptive optics (AO) to protect entanglement of high-dimensional photonic orbital-angular-momentum (OAM) states against turbulence-induced phase distortions. We demonstrate that AO is able to reduce crosstalk among the OAM modes and, consequently, the entanglement decay as well as photon losses. A test of the AO-stabilized output state against high-dimensional Bell inequalities shows that the transmitted entanglement allows for secure communication, even in the strong scintillation regime.