Physical Review Letters
نویسنده
چکیده
I discuss a simple numerical algorithm for direct evaluation of multiple Grassmann integrals. The approach is exact, suffers no fermion sign problems, and allows arbitrarily complicated interactions. Memory requirements grow exponentially with the interaction range and the transverse size of the system. Low dimensional systems with 1000 Grassmann variables can be evaluated on a workstation. The technique is illustrated with a spinless fermion hopping along a one dimensional chain. [S0031-9007(98)07450-X]
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A systematic review on reminder systems in physical therapy
Background: The main goal of physical therapy is to help the patient gain a better health status. Several studies have investigated the use of reminders to prevent such failures on the patients’ side. This article presents a systematic review of the literature concerning reminders in physical therapy. Methods: Databases were searched until May 2017 and literatures were found from April 1...
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The Comments and Addenda section is for short communications which are not of such urgency as to justify publication in Physical Review Letters and are not appropriate for regular Articles. It includes only the following types of communications: (I) comments on papers previously published in The Physical Review or Physical Review Letters; (2) addenda to papers previously puMished in The Physica...
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