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4,389,144
Lanczos method and the density of states of manyfermion systems
 Europhys. Lett
, 1989
"... Lanczos method and the density of states of manyfermion systems ..."
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Cited by 2 (2 self)
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Lanczos method and the density of states of manyfermion systems
EXACT RENORMALIZATION GROUP AND MANYFERMION SYSTEMS
, 2004
"... The exact renormalization group method is applied to manyfermion systems with shortrange attractive forces. The strength of the attractive fermionfermion interaction is determined from the vacuum scattering length. A set of approximate flow equations is derived including fermionic bosonic fluctat ..."
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The exact renormalization group method is applied to manyfermion systems with shortrange attractive forces. The strength of the attractive fermionfermion interaction is determined from the vacuum scattering length. A set of approximate flow equations is derived including fermionic bosonic
An Intrinsic 1/N Expansion for Many Fermion Systems
, 1992
"... The 1=N expansion is a popular tool for investigating nonperturbative long range phenomena. In many body models, discretization of the Fermi surface naturally introduces a many component picture. If, for example, number symmetry is broken, N ß (e 1 ) (d1) where ? 0 is the bare coupling cons ..."
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Cited by 16 (15 self)
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The 1=N expansion is a popular tool for investigating nonperturbative long range phenomena. In many body models, discretization of the Fermi surface naturally introduces a many component picture. If, for example, number symmetry is broken, N ß (e 1 ) (d1) where ? 0 is the bare coupling
RayleighSchrödingerGoldstone variational perturbation theory for many fermion systems
, 2004
"... Abstract. We present a RayleighSchrödingerGoldstone perturbation formalism for many fermion systems. Based on this formalism, variational perturbation scheme which goes beyond the Gaussian approximation is developed. In order to go beyond the Gaussian approximation, we identify a parent Hamiltonia ..."
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Abstract. We present a RayleighSchrödingerGoldstone perturbation formalism for many fermion systems. Based on this formalism, variational perturbation scheme which goes beyond the Gaussian approximation is developed. In order to go beyond the Gaussian approximation, we identify a parent
PauliPotential and Green Function MonteCarlo Method for ManyFermion Systems
, 1995
"... The time evolution of a manyfermion system can be described by a Green’s function corresponding to an effective potential, which takes antisymmetrization of the wave function into account, called the Paulipotential. We show that this idea can be combined with the Green’s Function Monte Carlo meth ..."
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The time evolution of a manyfermion system can be described by a Green’s function corresponding to an effective potential, which takes antisymmetrization of the wave function into account, called the Paulipotential. We show that this idea can be combined with the Green’s Function Monte Carlo
Simple Derivation of Cluster Expansions for ManyFermion Systems*l
, 1965
"... A simple alternative derivation of conventional cluster expansion formulas of Iwamoto and Yamada and others for the expectation value <II> of the energy of a manyFermion system is offered. The assumed trial function is of the general form F(JJJ>j(F{j)P ' F([Jp) 112, where (/) P is a ..."
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A simple alternative derivation of conventional cluster expansion formulas of Iwamoto and Yamada and others for the expectation value <II> of the energy of a manyFermion system is offered. The assumed trial function is of the general form F(JJJ>j(F{j)P ' F([Jp) 112, where (/) P is a
Determinant Bounds and the Matsubara UV Problem of Many–Fermion Systems
 Comm. Math. Phys
, 2008
"... Dedicated to Jürg Fröhlich in celebration of his 61 st birthday It is known that perturbation theory converges in fermionic field theory at weak coupling if the interaction and the covariance are summable and if certain determinants arising in the expansion can be bounded efficiently, e.g. if the co ..."
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Cited by 4 (1 self)
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.g. if the covariance admits a Gram representation with a finite Gram constant. The covariances of the standard many–fermion systems do not fall into this class due to the slow decay of the covariance at large Matsubara frequency, giving rise to a UV problem in the integration over degrees of freedom with Matsubara
Fermionic Squeezed State for Simple Algebraic Models in ManyFermion Systems
, 2004
"... It is shown that a variational approach with fermionic squeezed states to manyfermion systems such as pairing model is one of useful methods beyond the usual HartreeFockBogoliubov approximation. A pairingtype quasispin squeezed state is constructed and adopted as a trial state in the variational ..."
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It is shown that a variational approach with fermionic squeezed states to manyfermion systems such as pairing model is one of useful methods beyond the usual HartreeFockBogoliubov approximation. A pairingtype quasispin squeezed state is constructed and adopted as a trial state
Single scale analysis of many Fermion systems, Part 1: insulators
, 2003
"... For a twodimensional, weakly coupled system of fermions at temperature zero, one principal ingredient used to control the composition of the associated renormalization group maps is the careful counting of the number of quartets of sectors that are consistent with conservation of momentum. A simila ..."
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Cited by 4 (3 self)
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For a twodimensional, weakly coupled system of fermions at temperature zero, one principal ingredient used to control the composition of the associated renormalization group maps is the careful counting of the number of quartets of sectors that are consistent with conservation of momentum. A
Ward Identities and a Perturbative Analysis of a U(1) Goldstone Boson in a Many Fermion System
"... . We derive Ward identities, to all orders of perturbation theory, in many Fermion systems with short range interactions and broken U(1) number symmetry. They imply that the system is superrenormalizable in the Goldstone boson regime. Research supported in part by the Natural Sciences and Engineer ..."
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. We derive Ward identities, to all orders of perturbation theory, in many Fermion systems with short range interactions and broken U(1) number symmetry. They imply that the system is superrenormalizable in the Goldstone boson regime. Research supported in part by the Natural Sciences
Results 1  10
of
4,389,144