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Lux, Jonathan and Rosch, Achim ORCID: 0000-0002-6586-5721 (2015). Quench dynamics and statistics of measurements for a line of quantum spins in two dimensions. Phys. Rev. A, 91 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1094-1622

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Abstract

Motivated by recent experiments, we investigate the dynamics of a line of spin-down spins embedded in the ferromagnetic spin-up ground state of a two-dimensional XXZ model close to the Ising limit. In a situation where the couplings in the x and y directions are different, the quench dynamics of this system is governed by the interplay of one-dimensional excitations (kinks and holes) moving along the line and single-spin excitations evaporating into the two-dimensional background. A semiclassical approximation can be used to calculate the dynamics of this complex quantum system. Recently, it became possible to perform projective quantum measurements on such spin systems, allowing us to determine, e.g., the z component of each individual spin. We predict the statistical properties of such measurements which contain much more information than correlation functions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lux, Jonathan UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosch, Achim UNSPECIFIED orcid.org/0000-0002-6586-5721 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-412297
DOI:	10.1103/PhysRevA.91.023617
Journal or Publication Title:	Phys. Rev. A
Volume:	91
Number:	2
Date:	2015
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1094-1622
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ATOMIC MOTT INSULATOR; FIELD; GAS Multiple languages Optics; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41229