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Path Integral Monte Carlo
Keola Wierschem
Physics Department, FSU
Path Integral Monte Carlo – p. 1/
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View Full Document What is Path Integral Monte Carlo?
A computational technique for simulating quantum
systems at nonzero temperature.
PIMC allows us to use particle interactions at some
"high" temperature (where behavior is classical) to
study a system at much lower temperature, where
quantum Fuctuations are important.
PIMC is an exact method. In principle, no
approximations are needed. In practice, particle
interactions are not exact, and other approximations are
made for convienence.
Path Integral Monte Carlo – p. 2/
7
What is PIMC used for?
In 1953, Feynman suggested the use of Path Integrals
to explain super±uidity in He
4
.
Super±iudity can be understood as global permutation
chains between helium atoms (indistinguishable
bosons).
In the early 1980’s, the computer resources were ²nally
available to implement a full PIMC study of liquid helium
In general, PIMC is used to study low temperature
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This note was uploaded on 11/10/2011 for the course PHY 5157 taught by Professor Berg during the Fall '08 term at University of Florida.
 Fall '08
 Berg
 Physics

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