Molecular engineering of antiferromagnetic rings for quantum computation.
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.
Troiani
F
F
INFM-S3 National Research Center on nanoStructures and bioSystems at Surfaces and Dipartimento di Fisica, Università di Modena e Reggio Emilia, via G. Campi 213/A, I-41100 Modena, Italy. troiani.filippo@unimore.it
Ghirri
A
A
Affronte
M
M
Carretta
S
S
Santini
P
P
Amoretti
G
G
Piligkos
S
S
Timco
G
G
Winpenny
R E P
RE