Entanglement and four-wave mixing effects in the dissipation-free nonlinear interaction of two photons at a single atom

Journal Article · Wed Oct 01 04:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.043813· OSTI ID:20640402

Hofmann, Holger F; Takeuchi, Shigeki ^[1]; Kojima, Kunihiro; Sasaki, Keiji ^[2]

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1. PRESTO, Japan Science and Technology Corporation (JST), Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812 (Japan)
2. Research Institute for Electronic Science, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo 060-0812 (Japan)

We investigate the nonlinear interaction between two photons in a single-input pulse at an atomic two-level nonlinearity. A one-dimensional model for the propagation of light to and from the atom is used to describe the precise spatiotemporal coherence of the two-photon state. It is shown that the interaction generates spatiotemporal entanglement in the output state similar to the entanglement observed in parametric down-conversion. A method of generating photon pairs from coherent pump light using this quantum-mechanical four-wave mixing process is proposed.

• OSTI ID: 20640402
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BASIC INTERACTIONS
CONVERSION
CORRELATIONS
ENERGY LEVELS
FREQUENCY MIXING
MIXING
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
OPTICS
PHOTONS
PULSES
QUANTUM MECHANICS
VISIBLE RADIATION