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Title: Rotating entangled states of an exchange-coupled dimer of single-molecule magnets

An antiferromagnetically exchange-coupled dimer of single molecule magnets which possesses a large spin tunneling has been investigated. For this system, the ground and first excited states are entangled states, and the Hamiltonian is effectively similar to that of a two-state system at 2sth order in perturbation theory; thus this system can be mapped to an entangled pseudospin 1/2 particles. We study the effects of interaction and rotation of this system about its staggered easy-axis direction. The corresponding Hamiltonian of a rotated two-state entangled spin system is derived with its exact low-energy eigenstates and eigenvalues. We briefly discuss the effect of a dissipative environment on this rotated two-state system.
Authors:
 [1]
  1. Département de Physique, Groupe de Physique des Particules, Université de Montréal, C.P. 6128, succ. Centre-ville, Montréal, Québec H3C 3J7 (Canada)
Publication Date:
OSTI Identifier:
22273568
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIMERS; EIGENSTATES; EIGENVALUES; EXCITED STATES; HAMILTONIANS; MAGNETS; MOLECULES; PERTURBATION THEORY; QUANTUM ENTANGLEMENT; ROTATION; SPIN; TUNNEL EFFECT