title: Phase diagram and critical exponents of a dissipative Ising spin chain in a transverse magnetic field.
abstract: We consider a one-dimensional Ising model in a transverse magnetic field coupled to a dissipative heat bath. The phase diagram and the critical exponents are determined from extensive Monte Carlo simulations. It is shown that the character of the quantum phase transition is radically altered from the corresponding nondissipative model and the double well coupled to a dissipative heat bath with linear friction. Spatial couplings and the dissipative dynamics combine to form a new quantum criticality which is independent of dissipation strength.
authors.affiliation: Institut für theoretische Physik, ETH Hönggerberg, CH-8093 Zürich, Switzerland.
authors.forename: Philipp
authors.initials: P
authors.lastname: Werner
authors.forename: Klaus
authors.initials: K
authors.lastname: Völker
authors.forename: Matthias
authors.initials: M
authors.lastname: Troyer
authors.forename: Sudip
authors.initials: S
authors.lastname: Chakravarty