Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-08-05
New Journal of Physics 7 (2005) 218. Online at www.njp.org
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 5 figures
Scientific paper
10.1088/1367-2630/7/1/218
We 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.
Hänggi Peter
Kayanuma Yosuke
Kohler Sigmund
Saito Keiji
Wubs Martijn
No associations
LandOfFree
Landau-Zener transitions in qubits controlled by electromagnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Landau-Zener transitions in qubits controlled by electromagnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Landau-Zener transitions in qubits controlled by electromagnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-248803