Proposal to produce two and four qubits with spatial modes of two photons

Enrique J. Galvez

doi:10.1117/12.909439

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10 February 2012 Proposal to produce two and four qubits with spatial modes of two photons

Enrique J. Galvez

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Proceedings Volume 8274, Complex Light and Optical Forces VI; 82740G (2012) https://doi.org/10.1117/12.909439
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

This article presents a proposal for preparing photon pairs in states that are entangled in their spatial modes. The method allows the encoding of any pair of spatial modes that is desired, without restrictions; a procedure that up to now has been elusive. This method consists of three steps: preparing photon pairs in polarization-entangled states, filtering the spatial mode, and use of polarization interferometers with diffractive mode-encoding elements to effect entanglement swapping between polarization and spatial modes. An extension of the method consists of entangling polarization and spatial mode, allowing the preparation of a 4-qubit cluster state of two photons.

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Enrique J. Galvez "Proposal to produce two and four qubits with spatial modes of two photons", Proc. SPIE 8274, Complex Light and Optical Forces VI, 82740G (10 February 2012); https://doi.org/10.1117/12.909439

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