Nonlinear interaction of two photons with a one-dimensional atom : Spatiotemporal quantum coherence in the emitted field
PhysRevA_68_013803.pdf 477 KB
The nonlinear photon-photon interaction mediated by a single two-level atom is studied theoretically based on a one-dimensional model of the field-atom interaction. This model allows us to determine the effects of an atomic nonlinearity on the spatiotemporal coherence of a two-photon state. Specifically, the complete twophoton output wave function can be obtained for any two-photon input wave function. It is shown that the quantum interference between the components of the output state associated with different interaction processes causes bunching and antibunching in the two-photon statistics. This theory may be useful for various applications in photon manipulation, e.g., quantum information processing using photonic qubits, quantum nondemolition measurements, and the generation of entangled photons.
Physical Review A. Atomic, Molecular, and Optical Physics
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American Physical Society
Copyright (c) 2003 American Physical Society.
Graduate School of Advanced Sciences of Matter