Landau-Zener interferometry for qubits

A. Shytov (), D. Ivanov and M. Feigel’man

The European Physical Journal B: Condensed Matter and Complex Systems, 2003, vol. 36, issue 2, 263-269

Abstract: One may probe coherence of a qubit by periodically sweeping its control parameter. The qubit is then excited by the Landau-Zener (LZ) mechanism. The interference between multiple LZ transitions leads to an oscillatory dependence of the energy absorption rate on the sweeping amplitude and on the period. This interference pattern allows to determine the decoherence time of the qubit. We introduce a simple phenomenological model describing this “interferometer”, and find the form of the interference pattern. Copyright Springer-Verlag Berlin/Heidelberg 2003

Date: 2003
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DOI: 10.1140/epjb/e2003-00343-8

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