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APS » Journals » Phys. Rev. Lett. » Volume 100 » Issue 21
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Phys. Rev. Lett. 100, 215701 (2008) [4 pages]

Subarea Law of Entanglement in Nodal Fermionic Systems

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Letian Ding1, Noah Bray-Ali1, Rong Yu1,2, and Stephan Haas1
1Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA
2Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA

Received 4 January 2008; revised 22 April 2008; published 30 May 2008

We investigate the subarea-law scaling behavior of the block entropy in bipartite fermionic systems which do not have a finite Fermi surface. It is found that in gapped regimes the leading subarea term is a negative constant, whereas in critical regimes with point nodes the leading subarea law is a logarithmic additive term. At the phase boundary that separates the critical and noncritical regimes, the subarea scaling shows power-law behavior.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.215701
DOI:
10.1103/PhysRevLett.100.215701
PACS:
64.70.Tg, 03.67.Mn, 05.30.Fk, 73.43.Nq
 
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