Phys. Rev. Lett. 98, 257203 (2007) [4 pages]Critical Behavior of CP1 at θ=π, Haldane’s Conjecture, and the Relevant Universality ClassReceived 18 July 2006; published 20 June 2007 Using an approach to analyze the θ dependence of systems with a θ term we recently proposed, the critical behavior of CP1 at θ=π is studied. We find a region outside the strong coupling regime where Haldane’s conjecture is verified. The critical line, however, does not belong to the universality class of the Wess-Zumino-Novikov-Witten model at topological coupling k=1 since it shows continuously varying critical exponents. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.257203
DOI:
10.1103/PhysRevLett.98.257203
PACS:
75.10.Jm, 11.15.Ha
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.