A method for calculating quantum averages and static correlation functions of configurational observables is introduced, by extending a variational method, which permits the reduction of the problem to the computation of classical-like averages. This approach opens the possibility of obtaining novel results in many fields, and strongly shortens the computer time needed for numerical calculations. As an example, the well-known sine-Gordon model is considered, and its relevant quantum correlation functions are calculated on the whole temperature range.
EFFECTIVE POTENTIAL FOR QUANTUM CORRELATION-FUNCTIONS / A. CUCCOLI; V. TOGNETTI; R. VAIA. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 44:(1991), pp. 2734-2737. [10.1103/PhysRevA.44.2734]
EFFECTIVE POTENTIAL FOR QUANTUM CORRELATION-FUNCTIONS
CUCCOLI, ALESSANDRO;TOGNETTI, VALERIO;
1991
Abstract
A method for calculating quantum averages and static correlation functions of configurational observables is introduced, by extending a variational method, which permits the reduction of the problem to the computation of classical-like averages. This approach opens the possibility of obtaining novel results in many fields, and strongly shortens the computer time needed for numerical calculations. As an example, the well-known sine-Gordon model is considered, and its relevant quantum correlation functions are calculated on the whole temperature range.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.