Landau-Zener transitions in qubits controlled by electromagnetic fields

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dc.creatorWubs, Martijn
dc.creatorSaito, Keiji
dc.creatorKohler, Sigmund
dc.creatorKayanuma, Yosuke
dc.creatorHanggi, Peter
dc.date2005-08-05
dc.date.accessioned2026-07-07T06:22:13Z
dc.date.available2026-07-07T06:22:13Z
dc.descriptionWe investigate the influence of a dipole interaction with a classical radiation field on a qubit during a continuous change of a control parameter. In particular, we explore the non-adiabatic transitions that occur when the qubit is swept with linear speed through resonances with the time-dependent interaction. Two classical problems come together in this model: the Landau-Zener and the Rabi problem. The probability of Landau-Zener transitions now depends sensitively on the amplitude, the frequency and the phase of the Rabi interaction. The influence of the static phase turns out to be particularly strong, since this parameter controls the time-reversal symmetry of the Hamiltonian. In the limits of large and small frequencies, analytical results obtained within a rotating-wave approximation compare favourably with a numerically exact solution. Some physical realizations of the model are discussed, both in microwave optics and in magnetic systems.
dc.description12 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0508156
dc.identifierhttp://arxiv.org/abs/cond-mat/0508156
dc.identifierNew Journal of Physics 7 (2005) 218. Online at www.njp.org
dc.identifierdoi:10.1088/1367-2630/7/1/218
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95841
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleLandau-Zener transitions in qubits controlled by electromagnetic fields
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