Mode structure and photon number correlations in squeezed quantum pulses

Details Mode structure and photon number correlations in squeezed quantum pulses Mode structure and photon number correlations in squeezed quantum pulses

2002-04-22

arxiv.org/abs/quant-ph/0204131v2

Phys. Rev. A 66, 053813 (2002)

Physics

Quantum Physics

14 pages, 4 figures; minor revisions of the text, new references; to appear in the Phys. Rev. A

Scientific paper

10.1103/PhysRevA.66.053813

The question of efficient multimode description of optical pulses is studied. We show that a relatively very small number of nonmonochromatic modes can be sufficient for a complete quantum description of pulses with Gaussian quadrature statistics. For example, a three-mode description was enough to reproduce the experimental data of photon number correlations in optical solitons [S. Spalter et al., Phys. Rev. Lett. 81, 786 (1998)]. This approach is very useful for a detailed understanding of squeezing properties of soliton pulses with the main potential for quantum communication with continuous variables. We show how homodyne detection and/or measurements of photon number correlations can be used to determine the quantum state of the multi-mode field. We also discuss a possible way of physical separation of the nonmonochromatic modes.

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