Molecular engineering of antiferromagnetic rings for quantum computation

Details Molecular engineering of antiferromagnetic rings for quantum computation Molecular engineering of antiferromagnetic rings for quantum computation

2004-05-21

arxiv.org/abs/cond-mat/0405507v3

Phys. Rev. Lett. 94, 207208 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.94.207208

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.

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