Partial-state fidelity and quantum phase transitions induced by continuous level crossing

Details Partial-state fidelity and quantum phase transitions induced by continuous level crossing Partial-state fidelity and quantum phase transitions induced by continuous level crossing

2008-05-26

arxiv.org/abs/0805.3885v2

Phys. Rev. A 78, 062302 (2008)

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.78.062302

The global-state fidelity cannot characterize those quantum phase transitions (QPTs) induced by continuous level crossing due to its collapse around each crossing point. In this paper, we take the isotropic Lipkin-Meshkov-Glick (LMG) model and the antiferromagnetic one-dimensional Heisenberg model as examples to show that the partial-state fidelity can signal such level-crossing QPTs. Extending to the thermodynamic limit we introduce the partial-state fidelity susceptibility and study its scaling behavior. The maximum of the partial-state fidelity susceptibility goes like $N$ for the LMG model and $N^3$ for the Heisenberg model.

Affiliated with

Also associated with

No associations

Rating

Partial-state fidelity and quantum phase transitions induced by continuous level crossing 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 Partial-state fidelity and quantum phase transitions induced by continuous level crossing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partial-state fidelity and quantum phase transitions induced by continuous level crossing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-320933