Quantum phase transition of the sub-Ohmic rotor model

Details Quantum phase transition of the sub-Ohmic rotor model Quantum phase transition of the sub-Ohmic rotor model

2011-10-11

arxiv.org/abs/1110.2470v2

Phys. Rev. B 84, 195136 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, final version as published

Scientific paper

10.1103/PhysRevB.84.195136

We investigate the behavior of an $N$-component quantum rotor coupled to a bosonic dissipative bath having a sub-Ohmic spectral density $J(\omega) \propto \omega^s$ with $s<1$. With increasing dissipation strength, this system undergoes a quantum phase transition from a delocalized phase to a localized phase. We determine the exact critical behavior of this transition in the large-$N$ limit. For $1>s>1/2$, we find nontrivial critical behavior corresponding to an interacting renormalization group fixed point while we find mean-field behavior for $s<1/2$. The results agree with those of the corresponding long-range interacting classical model. The quantum-to-classical mapping is therefore valid for the sub-Ohmic rotor model.

Affiliated with

Also associated with

No associations

Rating

Quantum phase transition of the sub-Ohmic rotor 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 Quantum phase transition of the sub-Ohmic rotor model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum phase transition of the sub-Ohmic rotor model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-472541