35 citations · 90 across the 5 of their papers we have counts for
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cond-mat.stat-mech2012★ 30 cited
Quantum criticality in spin chains with non-ohmic dissipation
Iver Bakken Sperstad, Einar B. Stiansen, Asle Sudbø
We investigate the critical behavior of a spin chain coupled to bosonic baths characterized by a spectral density proportional to , with . Varying changes the effecti…
cond-mat.stat-mech2011★ 5 cited
Criticality of compact and noncompact quantum dissipative models in dimensions
Einar B. Stiansen, Iver Bakken Sperstad, Asle Sudbø
Using large-scale Monte Carlo computations, we study two versions of a -symmetric model with Ohmic bond dissipation. In one of these versions, the variables are restr…
cond-mat.stat-mech2010★ 14 cited
Monte Carlo simulations of dissipative quantum Ising models
Iver B. Sperstad, Einar B. Stiansen, Asle Sudbo
The dynamical critical exponent is a fundamental quantity in characterizing quantum criticality, and it is well known that the presence of dissipation in a quantum model has si…