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Title: A Numerically Exact Approach to Quantum Impurity Problems in Realistic Lattice Geometries

Abstract

We review a controlled numerical approach to quantum impurity problems in realistic geometries, consisting of exactly mapping the complete lattice Hamiltonian onto an equivalent one dimensional system through a unitary transformation. The resulting dimensional and entanglement reduction allows one to study the quantum many-body problem on arbitrary d-dimensional lattices using the density matrix renormalization group (DMRG) method. The real-space resolution allows one to position the impurities at the boundary or bulk of the sample and to study screening effects due to edge or surface modes. We describe how to generalize this approach to multi-impurity problems, discuss applications and possible extensions.

Authors:
;
Publication Date:
Research Org.:
Northeastern Univ., Boston, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1525896
Alternate Identifier(s):
OSTI ID: 1612174
Grant/Contract Number:  
SC0014407
Resource Type:
Published Article
Journal Name:
Frontiers in Physics
Additional Journal Information:
Journal Name: Frontiers in Physics Journal Volume: 7; Journal ID: ISSN 2296-424X
Publisher:
Frontiers Research Foundation
Country of Publication:
Switzerland
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; physics; Kondo interaction; quantum magnetism; computational methods; density matrix renormalization group, quantum impurities

Citation Formats

Allerdt, Andrew, and Feiguin, Adrian E. A Numerically Exact Approach to Quantum Impurity Problems in Realistic Lattice Geometries. Switzerland: N. p., 2019. Web. doi:10.3389/fphy.2019.00067.
Allerdt, Andrew, & Feiguin, Adrian E. A Numerically Exact Approach to Quantum Impurity Problems in Realistic Lattice Geometries. Switzerland. https://doi.org/10.3389/fphy.2019.00067
Allerdt, Andrew, and Feiguin, Adrian E. Wed . "A Numerically Exact Approach to Quantum Impurity Problems in Realistic Lattice Geometries". Switzerland. https://doi.org/10.3389/fphy.2019.00067.
@article{osti_1525896,
title = {A Numerically Exact Approach to Quantum Impurity Problems in Realistic Lattice Geometries},
author = {Allerdt, Andrew and Feiguin, Adrian E.},
abstractNote = {We review a controlled numerical approach to quantum impurity problems in realistic geometries, consisting of exactly mapping the complete lattice Hamiltonian onto an equivalent one dimensional system through a unitary transformation. The resulting dimensional and entanglement reduction allows one to study the quantum many-body problem on arbitrary d-dimensional lattices using the density matrix renormalization group (DMRG) method. The real-space resolution allows one to position the impurities at the boundary or bulk of the sample and to study screening effects due to edge or surface modes. We describe how to generalize this approach to multi-impurity problems, discuss applications and possible extensions.},
doi = {10.3389/fphy.2019.00067},
journal = {Frontiers in Physics},
number = ,
volume = 7,
place = {Switzerland},
year = {Wed Jun 12 00:00:00 EDT 2019},
month = {Wed Jun 12 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.3389/fphy.2019.00067

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Cited by: 7 works
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