Optimized perturbation method for the propagation in the anharmonic oscillator potential

Details Optimized perturbation method for the propagation in the anharmonic oscillator potential Optimized perturbation method for the propagation in the anharmonic oscillator potential

1998-07-17

arxiv.org/abs/quant-ph/9807044v1

Phys.Lett. A249 (1998) 259-264

Physics

Quantum Physics

13 pages, plain LATEX, 3 compressed and uuencoded Postscript figures, submitted to Phys.Lett.A

Scientific paper

10.1016/S0375-9601(98)00750-6

The application of the optimized expansion for the quantum-mechanical
propagation in the anharmonic potential $\lambda x^4$ is discussed for real and
imaginary time. The first order results in the imaginary time formalism provide
approximations to the free energy and particle density which agree well with
the exact results in the whole range of temperatures.

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