Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni).
We characterize supramolecular magnetic structures, consisting of two weakly coupled antiferromagnetic rings, by low-temperature specific heat, susceptibility, magnetization and electron paramagnetic resonance measurements. Intra- and inter-ring interactions are modeled through a microscopic spin-Hamiltonian approach that reproduces all the experimental data quantitatively and legitimates the use of an effective two-qubit picture. Spin entanglement between the rings is experimentally demonstrated through magnetic susceptibility below 50 mK and theoretically quantified by the concurrence.
Candini
A
A
National Research Center on nanoStructures and bioSystems at Surfaces (S3), CNR-INFM, 41100 Modena, Italy.
Lorusso
G
G
Troiani
F
F
Ghirri
A
A
Carretta
S
S
Santini
P
P
Amoretti
G
G
Muryn
C
C
Tuna
F
F
Timco
G
G
McInnes
E J L
EJ
Winpenny
R E P
RE
Wernsdorfer
W
W
Affronte
M
M