Phys. Rev. Lett. 86, 1–5 (2001)Unique Translation between Hamiltonian Operators and Functional IntegralsReceived 28 September 2000; published in the issue dated 1 January 2001 A careful treatment of the discretization errors in the path integral formulation of quantum mechanics leads to a unique prescription for the translation from the Hamiltonian to the action in the functional integral. An example is given by an interaction quadratic in the occupation number, characteristic for many body bosonic systems. As a result, the term linear in the occupation number (chemical potential) receives a correction as compared to the usual formulation based on coherent states. A perturbative calculation supports the relevance of this correction. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1
DOI:
10.1103/PhysRevLett.86.1
PACS:
05.30.Jp, 03.65.Db, 67.40.Kh
See AlsoComment: Michael Weyrauch and Andreas W. Schreiber, Comment on “Unique Translation between Hamiltonian Operators and Functional Integrals”, Phys. Rev. Lett. 88, 078901 (2002). |
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