Conformal data from finite entanglement scaling

Vid Stojevic, Jutho Haegeman, I. P. McCulloch, Luca Tagliacozzo, Frank Verstraete

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

In this paper, we apply the formalism of translation invariant (continuous) matrix product states in the thermodynamic limit to (1+1)-dimensional critical models. Finite bond dimension bounds the entanglement entropy and introduces an effective finite correlation length, so that the state is perturbed away from criticality. The assumption that the scaling hypothesis holds for this kind of perturbation is known in the literature as finite entanglement scaling. We provide further evidence for the validity of finite entanglement scaling and based on this formulate a scaling algorithm to estimate the central charge and critical exponents of the conformally invariant field theories describing the critical models under investigation. The algorithm is applied to three exemplary models; the cMPS version to the nonrelativistic Lieb-Liniger model and the relativistic massless boson, and MPS version to the one-dimensional quantum Ising model at the critical point. Another new aspect to our approach is that we directly use the (c)MPS induced correlation length rather than the bond dimension as scaling parameter. This choice is motivated by several theoretical arguments as well as by the remarkable accuracy of our results.

LanguageEnglish
Article number035120
Number of pages16
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number3
DOIs
Publication statusPublished - 20 Jan 2015

Fingerprint

scaling
Ising model
Bosons
Entropy
Thermodynamics
critical point
bosons
exponents
entropy
formalism
perturbation
thermodynamics
estimates
products

Keywords

  • entanglement
  • finite entanglement scaling
  • scaling algorithm

Cite this

Stojevic, Vid ; Haegeman, Jutho ; McCulloch, I. P. ; Tagliacozzo, Luca ; Verstraete, Frank. / Conformal data from finite entanglement scaling. In: Physical Review B - Condensed Matter and Materials Physics. 2015 ; Vol. 91, No. 3.
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Conformal data from finite entanglement scaling. / Stojevic, Vid; Haegeman, Jutho; McCulloch, I. P.; Tagliacozzo, Luca; Verstraete, Frank.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 3, 035120, 20.01.2015.

Research output: Contribution to journalArticle

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