From conformal to volume law for the entanglement entropy in exponentially deformed critical spin 1/2 chains Articles uri icon

authors

  • RAMIREZ, GIOVANNI
  • RODRIGUEZ LAGUNA, JAVIER
  • SIERRA, GERMAN

publication date

  • October 2014

issue

  • 10

volume

  • 2014

International Standard Serial Number (ISSN)

  • 1742-5468

abstract

  • An exponential deformation of 1D critical Hamiltonians gives rise to ground states whose entanglement entropy satisfies a volume law. This effect is exemplified in the XX and Heisenberg models. In the XX case we characterize the crossover between the critical and the maximally entangled ground state in terms of the entanglement entropy and the entanglement spectrum.

keywords

  • conformal field theory (theory); entanglement in extended quantum systems (theory); ladders and planes (theory); spin chains