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19 April 2024

» arxiv » cond-mat/0405507

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Molecular engineering of antiferromagnetic rings for quantum computation
F. Troiani ; A. Ghirri ; M. Affronte ; S. Carretta ; P. Santini ; G. Amoretti ; S. Piligkos ; G. Timco ; R.E.P. Winpenny ;
Date:	21 May 2004
Journal:	Phys. Rev. Lett. 94, 207208 (2005)
Subject:	Mesoscopic Systems and Quantum Hall Effect \| cond-mat.mes-hall
Abstract:	The substitution of one metal ion in a Cr-based molecular ring with dominant antiferromagnetic couplings allows to engineer its level structure and ground-state degeneracy. Here we characterize a Cr7Ni molecular ring by means of low-temperature specific-heat and torque-magnetometry measurements, thus determining the microscopic parameters of the corresponding spin Hamiltonian. The energy spectrum and the suppression of the leakage-inducing S-mixing render the Cr7Ni molecule a suitable candidate for the qubit implementation, as further substantiated by our quantum-gate simulations.
Source:	arXiv, cond-mat/0405507
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