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

被引：35
作者：
Hofmann, HF
Kojima, K
Takeuchi, S
Sasaki, K
机构：
[1] Hokkaido Univ, PRESTO, Japan Sci & Technol Corp, Kita Ku, Sapporo, Hokkaido 0600812, Japan
[2] Hokkaido Univ, Res Inst Elect Sci, Kita Ku, Sapporo, Hokkaido 0600812, Japan
来源：
PHYSICAL REVIEW A | 2003年 / 68卷 / 04期
关键词：
D O I：
10.1103/PhysRevA.68.043813
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
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页数：7
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