Classical optical analogue of quantum discord

Quantum discord has been shown to be a resource for quantum advantage in addition to quantum entanglement. While many experiments have demonstrated classical analogies of entanglement, none have done so for discord. We present a proof-of-concept demonstration for creating a classical analogue of qua...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2023-12, Vol.232 (20-22), p.3345-3351
Main Authors: Leamer, Jacob M., Zhang, Wenlei, Savino, Nicholas J., Saripalli, Ravi K., Lohani, Sanjaya, Glasser, Ryan T., Bondar, Denys I.
Format: Article
Language:English
Subjects:
Atomic
Classical and Continuum Physics
Condensed Matter Physics
Foundations of Quantum Mechanics
Gaussian beams (optics)
Many Body Systems
Materials Science
Measurement Science and Instrumentation
Molecular
Non-Equilibrium Quantum Physics
Optical and Plasma Physics
Physics
Physics and Astronomy
Quantum entanglement
Quantum phenomena
Qubits (quantum computing)
Regular Article
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Summary:Quantum discord has been shown to be a resource for quantum advantage in addition to quantum entanglement. While many experiments have demonstrated classical analogies of entanglement, none have done so for discord. We present a proof-of-concept demonstration for creating a classical analogue of quantum discord using classical light that takes advantage of the analogy between the state of two qubits and the spatial modes of a Laguerre-Gauss beam. We demonstrate the validity of this approach by comparing the intensity profiles of theoretical simulations to experimental results for different values of discord. Such a classical analogue of quantum discord may provide further insight in understanding and development of quantum information technologies that make use of discord.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjs/s11734-023-00988-1