Resilience of hybrid optical angular momentum qubits to turbulence

Year: 2015

Authors: Farias OJ., D’Ambrosio V., Taballione C., Bisesto F., Slussarenko S., Aolita L., Marrucci L., Walborn SP., Sciarrino F.

Autors Affiliation: Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil;‎ Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy;‎ Univ Naples Federico II, Dipartimento Fis, I-80126 Naples, Italy;‎ Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, Berlin, Germany;‎ CNR SPIN, I-80126 Naples, Italy;‎ CNR, Ist Nazl Ott, I-50125 Florence, Italy

Abstract: Recent schemes to encode quantum information into the total angular momentum of light, defining rotation-invariant hybrid qubits composed of the polarization and orbital angular momentum degrees of freedom, present interesting applications for quantum information technology. However, there remains the question as to how detrimental effects such as random spatial perturbations affect these encodings. Here, we demonstrate that alignment-free quantum communication through a turbulent channel based on hybrid qubits can be achieved with unit transmission fidelity. In our experiment, alignment-free qubits are produced with q-plates and sent through a homemade turbulence chamber. The decoding procedure, also realized with q-plates, relies on both degrees of freedom and renders an intrinsic error-filtering mechanism that maps errors into losses.


Volume: 5      Pages from: 8424-1  to: 8424-5

DOI: 10.1038/srep08424

Citations: 21
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