title: de Almeida-Thouless line in vector spin glasses.
abstract: We consider the infinite-range spin glass in which the spins have m>1 components (a vector spin glass). Applying a magnetic field which is random in direction, there is a de Almeida-Thouless (AT) line below which the "replica symmetric" solution is unstable, just as for the Ising (m=1) case. We calculate the location of this AT line for Gaussian random fields for arbitrary m and verify our results by numerical simulations for m=3 .
authors.affiliation: Department of Physics, University of California, Santa Cruz, California 95064, USA.
authors.forename: Auditya
authors.initials: A
authors.lastname: Sharma
authors.forename: A P
authors.initials: AP
authors.lastname: Young