No spin-localization phase transition in the spin-boson model without local field

Details No spin-localization phase transition in the spin-boson model without local field No spin-localization phase transition in the spin-boson model without local field

2012-03-18

arxiv.org/abs/1203.3948v2

Physics

Quantum Physics

5 pages, 1 figure. Comments are welcome

Scientific paper

We explore the spin-boson model in a special case, i.e., with zero local field. In contrast to previous studies, we find no possibility for quantum phase transition (QPT) happening between the localized and delocalized phases, and the behavior of the model can be fully characterized by the even or odd parity as well as the parity breaking, instead of the QPT, owned by the ground state of the system. Our analytical treatment about the eigensolution of the ground state of the model presents for the first time a rigorous proof of no-degeneracy for the ground state of the model, which is independent of the bath type, the degrees of freedom of the bath and the calculation precision. We argue that the QPT mentioned previously appears due to unreasonable treatment of the ground state of the model or of the infrared divergence existing in the spectral functions for Ohmic and sub-Ohmic dissipations.

Affiliated with

Also associated with

No associations

Rating

No spin-localization phase transition in the spin-boson model without local field 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 No spin-localization phase transition in the spin-boson model without local field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No spin-localization phase transition in the spin-boson model without local field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-617395