Authors

A. F. Abouraddy; G. Di Giuseppe; T. M. Yarnall; M. C. Teich;B. E. A. Saleh

Comments

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Abbreviated Journal Title

Phys. Rev. A

Keywords

BELL INEQUALITY; INTERFERENCE; MOMENTUM; ENTANGLEMENT; VIOLATION; Optics; Physics, Atomic, Molecular & Chemical

Abstract

Increasing the information-carrying capacity of a single photon may be achieved by utilizing multiple degrees of freedom. We describe here an approach that utilizes two degrees of freedom to encode three qubits per photon: one in polarization and two in the spatial-parity symmetry of the transverse field. In this conception, a polarization-sensitive spatial light modulator corresponds to a three-qubit controlled-unitary gate with one control qubit (polarization) and two target (spatial-parity-symmetry) qubits. We describe the construction of controlled-NOT (CNOT), n root CNOT, controlled-PHASE, and Fredkin gates, and the preparation of one-photon, three-qubit Greenberger-Horne-Zeilinger (GHZ) and W states. This approach enables simple optical implementations of few-qubit tasks in quantum information processing.

Journal Title

Physical Review A

Volume

86

Issue/Number

5

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000310847700001

ISSN

1050-2947

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