paper

Fidelity Susceptibility Study of Quantum Long-Range Antiferromagnetic Ising Chain

arXiv:1708.08212 · doi:10.1103/PhysRevA.96.043621

Abstract

We study the fidelity susceptibility of quantum antiferromagnetic Ising chain with a long-range power law interaction using the large-scale density matrix renormalization group method. We find that the critical adiabatic dimension and the critical exponent of the correlation length for arbitrary , indicating all quantum phase transitions are second-order Ising transitions. In addition, we numerically determine the complete phase diagram for from the data collapse of the fidelity susceptibility and show that the critical point changes monotonously with respect to . This work will shed light on the nature of phase transitions in the quantum long-range antiferromagnetic Ising chain from a quantum information perspective.

5 pages, 5 figures

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