Polarization state of a biphoton: Quantum ternary logic

Burlakov, AV; Chekhova, MV; Karabutova, OA; Klyshko, DN; Kulik, SP

doi:10.1103/PhysRevA.60.R4209

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Polarization state of a biphoton: Quantum ternary logic

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Burlakov, A., Chekhova, M., Karabutova, O., Klyshko, D., & Kulik, S. (1999). Polarization state of a biphoton: Quantum ternary logic. PHYSICAL REVIEW A, 60(6), R4209-R4212. doi:10.1103/PhysRevA.60.R4209.

Cite as: https://hdl.handle.net/21.11116/0000-0001-DF9F-2

Abstract

The polarization state of biphoton light generated via colinear frequency-degenerate spontaneous parametric down-conversion is considered. A biphoton is described by a three-component polarization vector, its arbitrary transformations relating to the SU(3) group. A subset of such transformations, available with retardation plates, is realized experimentally. In particular, two biphoton beams, formed by colinearly polarized photons (type I) are transformed into a single biphoton beam formed by orthogonally polarized photons (type II). Polarized biphotons are suggested as ternary analogs of two-state quantum systems (qubits). [S1050-2947(99)51312-7].