Helmes, Johannes and Wessel, Stefan (2014). Entanglement entropy scaling in the bilayer Heisenberg spin system. Phys. Rev. B, 89 (24). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1550-235X

Full text not available from this repository.

Abstract

We examine the entanglement properties of the spin-half Heisenberg model on the two-dimensional square-lattice bilayer based on quantum Monte Carlo calculations of the second Renyi entanglement entropy. In particular, we extract the dominant area-law contribution to the bipartite entanglement entropy that shows a nonmonotonous behavior upon increasing the interlayer exchange interaction: a local maximum in the area-law coefficient is located at the quantum critical point separating the antiferromagnetically ordered region from the disordered dimer-singlet regime. Furthermore, we consider subleading logarithmic corrections to the Renyi entanglement entropy scaling. Employing different subregion shapes, we isolate the logarithmic corner term from the logarithmic contribution due to Goldstone modes that is found to be enhanced in the limit of decoupled layers. At the quantum critical point, we estimate a contribution of 0.016(1) due to each 90 degrees corner. This corner term at the SU(2) quantum critical point deviates from the Gaussian theory value, while it compares well with recent numerical linked cluster calculations on the bilayer model.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Helmes, JohannesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wessel, StefanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-435801
DOI: 10.1103/PhysRevB.89.245120
Journal or Publication Title: Phys. Rev. B
Volume: 89
Number: 24
Date: 2014
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1550-235X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
TOPOLOGICAL ORDER; AREAMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/43580

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item