Variational matrix product state approach to quantum impurity models

Details Variational matrix product state approach to quantum impurity models Variational matrix product state approach to quantum impurity models

2005-04-12

arxiv.org/abs/cond-mat/0504305v2

Phys. Rev. B 80, 165117 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

revised version with application to Kondo model at large magnetic field (5 pages, 2 figures)

Scientific paper

10.1103/PhysRevB.80.165117

We present a unified framework for renormalization group methods, including Wilson's numerical renormalization group (NRG) and White's density-matrix renormalization group (DMRG), within the language of matrix product states. This allows improvements over Wilson's NRG for quantum impurity models, as we illustrate for the one-channel Kondo model. Moreover, we use a variational method for evaluating Green's functions. The proposed method is more flexible in its description of spectral properties at finite frequencies, opening the way to time-dependent, out-of-equilibrium impurity problems. It also substantially improves computational efficiency for one-channel impurity problems, suggesting potentially \emph{linear} scaling of complexity for $n$-channel problems.

Affiliated with

Also associated with

No associations

Rating

Variational matrix product state approach to quantum impurity models 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 Variational matrix product state approach to quantum impurity models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variational matrix product state approach to quantum impurity models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-350198