Effects of Boson Dispersion in Fermion-Boson Coupled Systems

Details Effects of Boson Dispersion in Fermion-Boson Coupled Systems Effects of Boson Dispersion in Fermion-Boson Coupled Systems

2000-05-24

arxiv.org/abs/cond-mat/0005395v1

Phys. Rev. B 62, 12800 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages RevTeX including 12 PS figures

Scientific paper

10.1103/PhysRevB.62.12800

We study the nonlinear feedback in a fermion-boson system using an extension of dynamical mean-field theory and the quantum Monte Carlo method. In the perturbative regimes (weak-coupling and atomic limits) the effective interaction among fermions increases as the width of the boson dispersion increases. In the strong coupling regime away from the anti-adiabatic limit, the effective interaction decreases as we increase the width of the boson dispersion. This behavior is closely related with complete softening of the boson field. We elucidate the parameters that control this nonperturbative region where fluctuations of the dispersive bosons enhance the delocalization of fermions.

Affiliated with

Also associated with

No associations

Rating

Effects of Boson Dispersion in Fermion-Boson Coupled Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Effects of Boson Dispersion in Fermion-Boson Coupled Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of Boson Dispersion in Fermion-Boson Coupled Systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-98686