Probing Quantum Frustrated Systems via Factorization of the Ground State

Details Probing Quantum Frustrated Systems via Factorization of the Ground State Probing Quantum Frustrated Systems via Factorization of the Ground State

2009-06-24

arxiv.org/abs/0906.4451v6

Phys. Rev. Lett. 104, 207202 (2010)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures. Replaced with published version

Scientific paper

10.1103/PhysRevLett.104.207202

The existence of definite orders in frustrated quantum systems is related rigorously to the occurrence of fully factorized ground states below a threshold value of the frustration. Ground-state separability thus provides a natural measure of frustration: strongly frustrated systems are those that cannot accommodate for classical-like solutions. The exact form of the factorized ground states and the critical frustration are determined for various classes of nonexactly solvable spin models with different spatial ranges of the interactions. For weak frustration, the existence of disentangling transitions determines the range of applicability of mean-field descriptions in biological and physical problems such as stochastic gene expression and the stability of long-period modulated structures.

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