Optimal correlation functions for simple quantum fluids
β Scribed by L.J. Lantto
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 490 KB
- Volume
- 328
- Category
- Article
- ISSN
- 0375-9474
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π SIMILAR VOLUMES
Applying the time-dependent variational principle of Balian and Ve ne roni, we derive variational approximations for multi-time correlation functions in 8 4 field theory. We assume first that the initial state is given and characterized by a density operator equal to a Gaussian density matrix. Then,
A review of the basic strategies that we have developed for the simulation of dynamic correlation functions in quantum systems is provided. Three methods are considered: (a) the analytic continuation of imaginary (thermal) time correlation functions to real times; (b) direct evaluation of thermally