A new correlator in quantum spin-chains

JP Keating, F Mezzadri, M Novaes

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)

Abstract

We propose a new correlator in one-dimensional quantum spin chains, the s-emptiness formation probability (s-EFP). This is a generalization of the emptiness formation probability (EFP), which is the probability that the first n spins of the chain are all aligned downwards. In the s-EFP we let the spins in question be separated by s sites. The usual EFP corresponds to the special case when s = 1. Taking s > 1 allows us to quantify non-local correlations. We express the s-EFP for the anisotropic XY model in a transverse magnetic field, a system with both critical and non-critical regimes, in terms of a Toeplitz determinant. For the isotropic XY model we find that the magnetic field induces an interesting length scale.
Translated title of the contributionA new correlator in quantum spin-chains
Original languageEnglish
Pages (from-to)L389 - L394
JournalJournal of Physics A: Mathematical and General
Volume39 (4)
Publication statusPublished - 16 Jun 2006

Bibliographical note

Publisher: IOP Publishing Ltd
Other identifier: IDS Number 056VU

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