Physics – Mathematical Physics
Scientific paper
2010-12-20
J. Math. Phys. 52, 053516 (2011)
Physics
Mathematical Physics
v4: 13 pages, REVTeX4-1, title changed, close to published version. Copyright (2011) American Institute of Physics. This artic
Scientific paper
10.1063/1.3589958
The Dirac's chord method may be suitable in different areas of physics for the representation of certain six-dimensional integrals for a convex body using the probability density of the chord length distribution. For a homogeneous model with a nonconvex body inside a medium with identical properties an analogue of the Dirac's chord method may be obtained, if to use so-called generalized chord distribution. The function is defined as normalized second derivative of the autocorrelation function. For nonconvex bodies this second derivative may have negative values and could not be directly related with a probability density. An interpretation of such a function using alternating sums of probability densities is considered. Such quasi-probability distributions may be used for Monte Carlo calculations of some integrals for a single body of arbitrary shape and for systems with two or more objects and such applications are also discussed in this work.
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