Scientific Results

Resilience of orbital-angular-momentum photonic qubits and effects on hybrid entanglement

Year: 2011

Authors: Giovannini D., Nagali E., Marrucci L., Sciarrino F.

Autors Affiliation: Dipartimento di Fisica, Sapienza Università di Roma, Roma I-00185, Italy;
Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, Italy;
CNR-SPIN, Complesso Universitario di Monte S. Angelo, I-80126 Napoli, Italy;
Istituto Nazionale di Ottica (INO-CNR), Largo E. Fermi 6, Florence I-50125, Italy

Abstract: The orbital angular momentum of light (OAM) provides a promising approach for the implementation of multidimensional states (qudits) for quantum-information purposes. In order to characterize the degradation undergone by the information content of qubits encoded in a bidimensional subspace of the orbital angular momentum degree of freedom of photons, we study how the state fidelity is affected by a transverse obstruction placed along the propagation direction of the light beam. Emphasis is placed on the effects of planar and radial hard-edged aperture functions on the state fidelity of Laguerre-Gaussian transverse modes and the entanglement properties of polarization-OAM hybrid-entangled photon pairs.


Volume: 83 (4)      Pages from: 042338  to: 042338

More Information: This work was supported by Project HYTEQ-FIRB, Finanziamento Ateneo 2009 of Sapienza Universita di Roma, and European Project PHORBITECH of the FET Program (Grant No. 255914).
DOI: 10.1103/PhysRevA.83.042338

Citations: 20
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