Uniform cross phase modulation for nonclassical radiation pulses

Details Uniform cross phase modulation for nonclassical radiation pulses Uniform cross phase modulation for nonclassical radiation pulses

2010-01-12

arxiv.org/abs/1001.1893v1

JOSA B, Vol. 27, Issue 6, pp. A36-A45 (2010)

Physics

Quantum Physics

11 pages, 4 figures. To appear in J. Opt. Soc. Am. B

Scientific paper

10.1364/JOSAB.27.000A36

We propose a scheme to achieve a uniform cross phase modulation (XPM) for two nonclassical light pulses and study its application for quantum non-demolition measurements of the photon number in a pulse and for controlled phase gates in quantum information. We analyze the scheme by quantizing a common phenomenological model for classical XPM. Our analysis first treats the ideal case of equal cross-phase modulation and pure unitary dynamics. This establishes the groundwork for more complicated studies of non-unitary dynamics and difference in phase shifts between the two pulses where decohering effects severely affect the performance of the scheme.

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