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Quantum tails in the momentum distribution functions of non‐ideal Fermi systems
Author(s) -
Larkin A.S.,
Filinov V.S.
Publication year - 2018
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201700105
Subject(s) - physics , momentum (technical analysis) , statistical physics , distribution function , coulomb , distribution (mathematics) , quantum mechanics , quantum electrodynamics , electron , mathematics , mathematical analysis , finance , economics
In classical statistics, the momentum distribution functions are Maxwellian in the state of thermodynamic equilibrium. However, quantum effects can change it to non‐Maxwellian through two mechanisms. The first mechanism is an exchange interaction between identical particles, leading to the Fermi distribution. The second mechanism is the Heisenberg's principle: an interaction of a particle with others reduces the volume available to it, which leads to uncertainty in the momentum and results in an increased probability of having a higher momentum. In this paper, the momentum distribution functions of a two‐component Coulomb system are computed using the Monte Carlo method. It is shown that the momentum distribution functions have high‐momentum “tails” in the regime of strong coupling.