Quantum state diffusion with a moving basis: computing quantum-optical spectra

Physics – Atomic Physics

Scientific paper

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8 pages in RevTeX, 1 uuencoded postscript figure, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.53.2694

Quantum state diffusion (QSD) as a tool to solve quantum-optical master equations by stochastic simulation can be made several orders of magnitude more efficient if states in Hilbert space are represented in a moving basis of excited coherent states. The large savings in computer memory and time are due to the localization property of the QSD equation. We show how the method can be used to compute spectra and give an application to second harmonic generation.

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