Universität zu Köln

Janssen, Lukas ORCID: 0000-0003-4919-796X, Wang, Wei, Scherer, Michael M., Meng, Zi Yang and Xu, Xiao Yan ORCID: 0000-0002-8615-7396 (2020). Confinement transition in the QED(3)-Gross-Neveu-XY universality class. Phys. Rev. B, 101 (23). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

The coupling between fermionic matter and gauge fields plays a fundamental role in our understanding of nature, while at the same time posing a challenging problem for theoretical modeling. In this situation, controlled information can be gained by combining different complementary approaches. Here, we study a confinement transition in a system of N-f flavors of interacting Dirac fermions charged under a U(1) gauge field in 2 + 1 dimensions. Using quantum Monte Carlo simulations, we investigate a lattice model that exhibits a continuous transition at zero temperature between a gapless deconfined phase, described by three-dimensional quantum electrodynamics, and a gapped confined phase, in which the system develops valence-bond-solid order. We argue that the quantum critical point is in the universality class of the QED(3)-Gross-Neveu-XY model. We study this field theory within a 1/N-f expansion in fixed dimension as well as a renormalization group analysis in 4 - epsilon space-time dimensions. The consistency between numerical and analytical results is revealed from large to intermediate flavor number.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Janssen, Lukas UNSPECIFIED orcid.org/0000-0003-4919-796X UNSPECIFIED Wang, Wei UNSPECIFIED UNSPECIFIED UNSPECIFIED Scherer, Michael M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meng, Zi Yang UNSPECIFIED UNSPECIFIED UNSPECIFIED Xu, Xiao Yan UNSPECIFIED orcid.org/0000-0002-8615-7396 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-330627
DOI:	10.1103/PhysRevB.101.235118
Journal or Publication Title:	Phys. Rev. B
Volume:	101
Number:	23
Date:	2020
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33062