Quantum field theory of photons with orbital angular momentum

G. F. Calvo, A. Picón, E. Bagan

Research output: Contribution to journalArticleResearchpeer-review

76 Citations (Scopus)


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 Poincaré sphere of unitarily related families of paraxial spatial modes. © 2006 The American Physical Society.
Original languageEnglish
Article number013805
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Publication statusPublished - 1 Jan 2006


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