Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

NATO ASI series. Series B : Physics

Revising the 1/N Expansion for the Slave-Boson Approach within the Functional Integral

Enrico Arrigoni, Claudio Castellani, Roberto Raimondi, Giancarlo Calvanese Strinati

Published Jan 1, 1995• 0 citations
Publisher
DOI
10.1007/978-1-4899-1042-4_22

Related papers

Density correlations within the time-continuum slave-boson functional integral formulation: Comparison with an alternative approach

Lew Gehlhoff

Solid State Communications•Apr 1, 1996•0 citations

Functional-integral formulation of the slave-boson approach: Beyond the mean-field treatment with the correct continuum limit

Enrico Arrigoni, Claudio Castellani, M. Grilli +2 more

Physics Reports•Jun 1, 1994•30 citations

Consistent 1/N-expansion for the four-slave-boson approach with an appropriate operator-ordering prescription

Enrico Aarrigoni, Giancarlo Calvanese Strinati

Journal of Low Temperature Physics•May 1, 1995•1 citation

Superconducting and Antiferromagnetic Instabilities in the Slave Boson Approach to the Hubbard Model: Functional Integral Formulation

P. Wróbel

Springer eBooks•Jan 1, 1990•0 citations

Slave bosons in radial gauge: the correct functional integral representation and inclusion of non-local interactions

Raymond Frésard, Thilo Kopp

arXiv:cond-mat/0011296•Nuclear Physics B•Feb 1, 2001•25 citations

Correct formulation of the 1/Nexpansion for the slave-boson approach within the functional integral

Enrico Arrigoni, Claudio Castellani, Roberto Raimondi +1 more

We consider the slave-boson method within the coherent-state functional integral representation of the partition function, and show how to deal with the continuum imaginary-time limit required by the very definition of the functional integral. We find that a correct treatment of the continuum limit modifies the free energy when fluctuation (1/N) corrections beyond the mean-field solution are considered. Numerical results are presented for a two-level single-site model system (with an infinite Hubbard repulsion), for which the additional terms in the free energy introduced by the correct continuum limit act to validate the 1/N expansion. Our analysis calls for a revision of several outcomes of the slave-boson method with the inclusion of fluctuation corrections.

Physical review. B, Condensed matter•Jul 15, 1994•39 citations
We consider the slave-boson method within the coherent-state functional integral representation of the partition function, and show how to deal with the continuum imaginary-time limit required by the very definition of the functional integral. We find that a correct treatment of the continuum limit modifies the free energy when fluctuation (1/N) corrections beyond the mean-field solution are considered. Numerical results are presented for a two-level single-site model system (with an infinite Hubbard repulsion), for which the additional terms in the free energy introduced by the correct continuum limit act to validate the 1/N expansion. Our analysis calls for a revision of several outcomes of the slave-boson method with the inclusion of fluctuation corrections.