Cited by 33Quantum many-body systemsTheoretical and Computational PhysicsQuantum Information and Cryptography

Scaling of the fidelity susceptibility in a disordered quantum spin chain

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Jacobson, N. Tobias, Garnerone, Silvano, Haas, Stephan, Zanardi, Paolo·2009·Physical Review B

Abstract

The phase diagram of a quantum $XY$ spin chain with Gaussian-distributed random anisotropies and transverse fields is investigated, with focus on the fidelity susceptibility, a recently introduced quantum information theoretical measure. Monitoring the finite-size scaling of the probability distribution of this quantity as well as its average and typical values, we detect a disorder-induced disappearance of criticality and the emergence of Griffiths phases in this model. It is found that the fidelity susceptibility is not self-averaging near the disorder-free quantum-critical lines. At the Ising critical point the fidelity susceptibility scales as a disorder-strength independent stretched exponential of the system size, in contrast with the quadratic scaling at the corresponding point in the disorder-free $XY$ chain. Along the line where the average anisotropy vanishes the fidelity susceptibility appears to scale extensively, whereas in the disorder-free case this point is quantum critical with quadratic finite-size scaling.

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  • In higher-dimensional lattices, states obeying the Area law may still be amenable to classical simulation using tensor networks, density functional theories, or quantum Monte Carlo.

    “In higher-dimensional lattices, states which obey the socalled 'Area law' [97], where quantum correlations are smaller than in generic states, may still be amenable to a classical simulation using state-of-the-art techniques such as tensor networks [77, 81, 82, 198, 199], Density Functional Theories [86], or Quantum Monte Carlo [75].”

    From Can one trust quantum simulators? (2012) · cites this paper as [198]

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Authors
Jacobson, N. T., Garnerone, S., Haas, S., & Zanardi, P.
Affiliations
University of Southern California (US)
Venue
Physical Review B
Published
2009-05-26
Volume
79
Issue
18
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
OpenAlex
W1995733193
Cited by
33
References
24
Citations by year
2025: 3 · 2024: 2 · 2023: 2 · 2022: 1 · 2019: 2 · 2018: 1 · 2016: 2 · 2015: 1 · 2014: 6 · 2012: 4
FWCI
2.41
Type
journal article
Language
en
Open access
Locations
  • Physical Review B (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Theoretical and Computational Physics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
Keywords
fidelity susceptibility, quantum spin chains, disordered quantum systems, quantum XY model, Griffiths phase, finite-size scaling, quantum criticality, self-averaging, transverse field, quantum information measures

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