Local discrimination of orbital angular momentum in entangled states
Simone Cialdi (1, 2), Edoardo Suerra (1, 2), Samuele Altilia (1, and 2), Stefano Olivares (1, 2), Bruno Paroli (1, 2), Marco A. C., Potenza (1, 2), Mirko Siano (1, 2), Matteo G. A. Paris (1, 2) ((1), Universit\`a degli Studi di Milano, (2) Istituto Nazionale di Fisica, Nucleare)
TL;DR
This paper presents a method using calcite crystal-based local detectors with spatial shifts to discriminate orbital angular momentum in entangled quantum states, advancing quantum communication capabilities.
Contribution
It introduces a novel local detection technique employing spatial shifts in calcite crystals for orbital angular momentum discrimination in entangled states.
Findings
Successful discrimination of orbital angular momentum using the proposed method
Potential application in long-distance quantum communication
Advancement in local detection techniques for quantum states
Abstract
We address the use of a calcite crystal-based local detector to the discrimination of orbital angular momentum of quantum radiation produced by parametric down conversion. We demonstrate that a discrimination can be obtained exploiting the introduction of a fine and controlled spatial shift between two replicas of the state in the crystals. We believe that this technology could be used for future development of long-distance quantum communication techniques, where information encoding is based on orbital angular momentum.
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Taxonomy
TopicsOrbital Angular Momentum in Optics · Quantum Information and Cryptography · Quantum optics and atomic interactions