| Numéro |
J. Phys. I France
Volume 4, Numéro 4, April 1994
|
|
|---|---|---|
| Page(s) | 493 - 497 | |
| DOI | https://doi.org/10.1051/jp1:1994154 | |
DOI: 10.1051/jp1:1994154
J. Phys. I France 4 (1994) 493-497
Physikalisches Institut der Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
© Les Editions de Physique 1994
J. Phys. I France 4 (1994) 493-497
Short Communication
Extension of the Popov-Fedotov method to arbitrary spin
O. Veits, R. Oppermann, M. Binderberger and J. SteinPhysikalisches Institut der Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
(Received 28 January 1994, accepted 21 February 1994)
Abstract
The partition function and thermodynamic expectation values of a
spin system with arbitrary spin quantum number are expressed by
an exact fermionic representation on Fock space. Extending a
suggestion of Popov and Fedotov, this is achieved by introducing
a set of imaginary chemical potentials. Spin operators are
replaced by usual bilinear combinations of Fermi operators
satisfying the spin commutation relations.
© Les Editions de Physique 1994