Ukrainian Journal of Physical Optics 

Volume 21, Issue 3, 2020
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Single-photon entanglement at acousto-optic (acousto-gyration) diffraction

Skab I., Kostyrko M. and Vlokh R.

O. G. Vlokh Institute of Physical Optics, 23 Dragomanov Street, 79005 Lviv, Ukraine

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Abstract. We show that a single-photon entanglement can be realized at the collinear acousto-gyration diffraction in optical active and optically uniaxial (or isotropic) media. The entanglement between two degrees of freedom, spin angular momentum and orbital angular momentum, can occur when a standing longitudinal acoustic wave is excited in the above media. This makes it possible to realize four maximum entangled Bell states.

Keywords: quantum entanglement, photons, optical activity, acousto-optics, acousto-gyration

UDC: 535.56+535.14+534.16+535.42
Ukr. J. Phys. Opt. 21 152-158
doi: 10.3116/16091833/21/3/152/2020
Received: 16.07.2020

Анотація.  Показано, що однофотонне заплутування можна реалізувати за умови колінеарної акустогіраційної дифракції в оптично активних і оптично одновісних (або ізотропних) середовищах. Заплутування між двома ступенями вільності (спіновим моментом імпульсу і орбітальним моментом імпульсу) відбувається в тому разі, коли в зазначених середовищах збуджено стоячу поздовжню акустичну хвилю. Це дає змогу реалізувати чотири максимально заплутаних стани Белла..
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