Quantum simulations and experiments on Rabi oscillations of spin qubits: Intrinsic vs extrinsic damping

De Raedt, H.; Barbara, B.; Gambarelli, S.; Bertaina, S.; Miyashita, S.; Michielsen, K.

doi:10.1103/PhysRevB.85.014408

Journal Article

PreJuSER-20025

Quantum simulations and experiments on Rabi oscillations of spin qubits: Intrinsic vs extrinsic damping

De Raedt, H. ; Barbara, B. ; Miyashita, S. ; Michielsen, K.FZJ* ; Bertaina, S. ; Gambarelli, S.

2012
APS College Park, Md.

Physical review / B 85(1), 014408 (2012) [10.1103/PhysRevB.85.014408]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/10873 doi:10.1103/PhysRevB.85.014408

Abstract: Electron paramagnetic resonance experiments show that the decay of Rabi oscillations of ensembles of spin qubits depends noticeably on the microwave power, and more precisely on the Rabi frequency, an effect recently called "driven decoherence." By direct numerical solution of the time-dependent Schrodinger equation of the associated many-body system, we scrutinize the different mechanisms that may lead to this type of decoherence. Assuming the effects of dissipation to be negligible (T-1 = infinity), it is shown that a system of dipolar-coupled spins with (even weak) random inhomogeneities is sufficient to explain the salient features of the experimental observations. Some experimental examples are given to illustrate the potential of the numerical simulation approach.

Keyword(s): J

Classification:

Physics, Condensed Matter

Note: This work was supported by NCF, The Netherlands (HDR), the Mitsubishi Foundation (SM), and the city of Marseille, Aix-Marseille University (S.B., BQR grant). We thank the multidisciplinary EPR facility of Marseille (PFM Saint Charles) for technical support. Part of the calculations has been performed on JUGENE at JSC under VSR project 4331.

Contributing Institute(s):