Multiphoton coherent manipulation in large-spin qubits

Sylvain Bertaina (1) , Lin Chen (1) , N. Groll (1) , J. van Tol (1) , N. S. Dalal (1, 2) , I. Chiorescu (1)

1 NHMFL - National High Magnetic Field Laboratory
2 Department of Chemistry and Biochemistry

Large spin Mn2+ ions (S=5/2) diluted in a non-magnetic MgO matrix of high crystalline symmetry are used to realize a six level system that can be operated by means of multi-photon coherent Rabi oscillations. This spin system has a very small anisotropy which can be tuned in-situ to reversibly transform the system between harmonic and non-harmonic level configurations. Decoherence effects are strongly suppressed as a result of the quasi-isotropic electron interaction with the crystal field and with the 55Mn nuclear spins. These results suggest new ways of manipulating, reading and resetting spin quantum states which can be applied to encode a qubit across several quantum levels.

Domaines: Autre [cond-mat.other]

Sylvain Bertaina, Lin Chen, N. Groll, J. van Tol, N. S. Dalal, et al.. Multiphoton coherent manipulation in large-spin qubits. Physical Review Letters, 2009, 102, pp.050501. ⟨10.1103/PhysRevLett.102.050501⟩. ⟨hal-00421128⟩