The substitution of one metal ion in a Cr-based molecular ring with dominant antiferromagnetic couplings allows the engineering of 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.
Molecular Engineering of Antiferromagnetic Rings for Quantum Computation / F., Troiani; A., Ghirri; M., Affronte; Carretta, Stefano; Santini, Paolo; Amoretti, Giuseppe; S., Piligkos; G., Timco; R. E. P., Winpenny. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 94:(2005), pp. 207208-1-207208-4. [10.1103/PhysRevLett.94.207208]
Molecular Engineering of Antiferromagnetic Rings for Quantum Computation
CARRETTA, Stefano;SANTINI, Paolo;AMORETTI, Giuseppe;
2005-01-01
Abstract
The substitution of one metal ion in a Cr-based molecular ring with dominant antiferromagnetic couplings allows the engineering of 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.File | Dimensione | Formato | |
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