Quantum phase transition in a disordered long-range transverse Ising antiferromagnet

Details Quantum phase transition in a disordered long-range transverse Ising antiferromagnet Quantum phase transition in a disordered long-range transverse Ising antiferromagnet

2010-01-21

arxiv.org/abs/1001.3747v2

Physical Review E 81, 021101 (2010)

Physics

Condensed Matter

Statistical Mechanics

16 pages, 12 figures. accepted in PRE

Scientific paper

We consider a long-range Ising antiferromagnet put in a transverse field (LRTIAF) with disorder. We have obtained the phase diagrams for both the classical and quantum case. For the pure case applying quantum Monte Carlo method, we study the variation of order parameter (spin correlation in the Trotter direction), susceptibility and average energy of the system for various values of the transverse field at different temperatures. The antiferromagnetic order is seen to get immediately broken as soon as the thermal or quantum fluctuations are added. We discuss generally the phase diagram for the same LRTIAF model with perturbative Sherrington-Kirkpatrick (SK) type disorder. We find that while the antiferromagnetic order is immediately broken as one adds an infinitesimal transverse field or thermal fluctuation to the pure LRTIAF system, an infinitesimal SK spin glass disorder is enough to induce a stable glass order in the LRTIAF. This glass order eventually gets destroyed as the thermal or quantum fluctuations are increased beyond their threshold values and the transition to para phase occurs. Analytical studies for the phase transitions are discussed in detail in each case. These transitions have been confirmed by applying classical and quantum Monte Carlo methods. We show here that the disordered LRTIAF has a surrogate incubation property of the SK spin glass phase.

Affiliated with

Also associated with

No associations

Rating

Quantum phase transition in a disordered long-range transverse Ising antiferromagnet 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 in a disordered long-range transverse Ising antiferromagnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum phase transition in a disordered long-range transverse Ising antiferromagnet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-248947