Solution to sign problems in models of interacting fermions and quantum spins
Abstract
We show that solutions to fermion sign problems that are found in the formulation where the path integral is expanded in powers of the interaction in continuous time can be extended to systems involving fermions interacting with dynamical quantum spins. While these sign problems seem unsolvable in the auxiliary field approach, solutions emerge in the world-line representation of quantum spins. Combining this idea with meron-cluster methods, we are able to further extend the class of models that are solvable. We demonstrate these solutions to sign problems by considering several examples of strongly correlated systems that contain the physics of semimetals, insulators, superfluidity, and antiferromagnetism.
- Authors:
-
- Duke Univ., Durham, NC (United States). Dept. of Physics
- Duke Univ., Durham, NC (United States). Dept. of Physics; Indian Inst. of Science, Bangalore (India). Center for High Energy Physics
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1536400
- Alternate Identifier(s):
- OSTI ID: 1329344
- Grant/Contract Number:
- FG02-05ER41368
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 4; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Huffman, Emilie, and Chandrasekharan, Shailesh. Solution to sign problems in models of interacting fermions and quantum spins. United States: N. p., 2016.
Web. doi:10.1103/physreve.94.043311.
Huffman, Emilie, & Chandrasekharan, Shailesh. Solution to sign problems in models of interacting fermions and quantum spins. United States. https://doi.org/10.1103/physreve.94.043311
Huffman, Emilie, and Chandrasekharan, Shailesh. Wed .
"Solution to sign problems in models of interacting fermions and quantum spins". United States. https://doi.org/10.1103/physreve.94.043311. https://www.osti.gov/servlets/purl/1536400.
@article{osti_1536400,
title = {Solution to sign problems in models of interacting fermions and quantum spins},
author = {Huffman, Emilie and Chandrasekharan, Shailesh},
abstractNote = {We show that solutions to fermion sign problems that are found in the formulation where the path integral is expanded in powers of the interaction in continuous time can be extended to systems involving fermions interacting with dynamical quantum spins. While these sign problems seem unsolvable in the auxiliary field approach, solutions emerge in the world-line representation of quantum spins. Combining this idea with meron-cluster methods, we are able to further extend the class of models that are solvable. We demonstrate these solutions to sign problems by considering several examples of strongly correlated systems that contain the physics of semimetals, insulators, superfluidity, and antiferromagnetism.},
doi = {10.1103/physreve.94.043311},
journal = {Physical Review E},
number = 4,
volume = 94,
place = {United States},
year = {Wed Oct 19 00:00:00 EDT 2016},
month = {Wed Oct 19 00:00:00 EDT 2016}
}
Web of Science
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