Transverse spatial entanglement in parametric down-conversion

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.062305· OSTI ID:21140620

Walborn, S P; Monken, C H ^[1]

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1. Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, RJ 21945-970 (Brazil)

It is known that the entanglement present in the transverse spatial properties of photon pairs generated by spontaneous parametric down-conversion depends explicitly on the characteristics of the pump laser beam. Here we show that, for pump beams described by a Hermite-Gaussian mode, the entanglement depends on the beam width as well as the order of the beam. The amount of entanglement generally increases with the order of the beam and is less dependent on the beam width for higher orders. We propose a method to measure the spatial entanglement directly, independent of the dimension of the subsystems.

• OSTI ID: 21140620
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM PROFILES
LASER RADIATION
PHOTON BEAMS
PHOTONS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS