Density Profiles in Random Quantum Spin Chains

Details Density Profiles in Random Quantum Spin Chains Density Profiles in Random Quantum Spin Chains

1996-09-27

arxiv.org/abs/cond-mat/9609263v1

Phys. Rev. Lett. 78 (1997) 2473

Physics

Condensed Matter

4 pages RevTeX, 4 eps-figures included

Scientific paper

10.1103/PhysRevLett.78.2473

We consider random transverse-field Ising spin chains and study the magnetization and the energy-density profiles by numerically exact calculations in rather large finite systems ($L\le 128$). Using different boundary conditions (free, fixed and mixed) the numerical data collapse to scaling functions, which are very accurately described by simple analytic expressions. The average magnetization profiles satisfy the Fisher-de Gennes scaling conjecture and the corresponding scaling functions are indistinguishable from those predicted by conformal invariance.

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