Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2006-07-18
Phys. Rev. Lett. 98, 210402 (2007)
Physics
Condensed Matter
Statistical Mechanics
4 pages, 6 figures; final version, as published
Scientific paper
10.1103/PhysRevLett.98.210402
Employing the non-perturbative numerical renormalization group method, we study the dynamics of the spin-boson model, which describes a two-level system coupled to a bosonic bath with spectral density J(omega) propto omega^s. We show that, in contrast to the case of ohmic damping, the delocalized phase of the sub-ohmic model cannot be characterized by a single energy scale only, due to the presence of a non-trivial quantum phase transition. In the strongly sub-ohmic regime, s<<1, weakly damped coherent oscillations on short time scales are possible even in the localized phase - this is of crucial relevance, e.g., for qubits subject to electromagnetic noise.
Anders Frithjof B.
Bulla Ralf
Vojta Matthias
No associations
LandOfFree
Equilibrium and non-equilibrium dynamics of the sub-ohmic spin-boson model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Equilibrium and non-equilibrium dynamics of the sub-ohmic spin-boson model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equilibrium and non-equilibrium dynamics of the sub-ohmic spin-boson model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-122097