Fidelity susceptibility for SU(2)-invariant states

Details Fidelity susceptibility for SU(2)-invariant states Fidelity susceptibility for SU(2)-invariant states

2008-09-29

arxiv.org/abs/0809.4898v1

Physics

Quantum Physics

Four pages and one figure

Scientific paper

We study the fidelity susceptibility of two SU(2)-invariant reduced density matrices. Due to the commuting property of these matrices, analytical results for reduced fidelity susceptibility are obtained and can be applied to study quantum phase transitions in SU(2)-invariant systems. As an example, we analyze the quantum criticality of the spin-one bilinear-biquadratic model via the fidelity approach.

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