A Quantum Field Theory Twist to Photon Angular Momentum

Details A Quantum Field Theory Twist to Photon Angular Momentum A Quantum Field Theory Twist to Photon Angular Momentum

2005-09-06

arxiv.org/abs/quant-ph/0509040v1

Physics

Quantum Physics

10 pages, 1 figure

Scientific paper

A quantum field theory approach is put forward to generalize the concept of classical spatial light beams carrying orbital angular momentum to the single-photon level. This quantization framework is carried out both in the paraxial and nonparaxial regimes. Upon extension to the optical phase space, closed-form expressions are found for a photon Wigner representation describing transformations on the orbital Poincare sphere of unitarily related families of paraxial spatial modes.

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