Demonstration of a programmable source of two-photon multiqubit entangled states

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.042322· OSTI ID:21408581

Cialdi, Simone ^[1]; Brivio, Davide ^[1]; Paris, Matteo G. A. ^[1]

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1. Dipartimento di Fisica dell'Universita degli Studi di Milano, I-20133 Milano (Italy)

We suggest and demonstrate a novel source of two-photon multipartite entangled states which exploits the transverse spatial structure of spontaneous parametric down-conversion together with a programmable spatial light modulator (SLM). The one-dimensional SLM is used to perform polarization entanglement purification and to realize arbitrary phase gates between polarization and momentum degrees of freedom of photons. We experimentally demonstrate our scheme by generating two-photon three-qubit linear cluster states with high fidelity using a diode laser pump with a limited coherence time and power on the crystal as low as {approx}2.5 mW.

• OSTI ID: 21408581
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BOSONS
CONVERSION
CRYSTALS
DEGREES OF FREEDOM
ELEMENTARY PARTICLES
LASERS
MASSLESS PARTICLES
MICROSCOPY
ONE-DIMENSIONAL CALCULATIONS
OPTICAL MICROSCOPY
PHOTONS
POLARIZATION
QUANTUM ENTANGLEMENT
SCANNING LIGHT MICROSCOPY