Manipulation with Andreev levels in Josephson contacts for
quantum information processing
Wednesday, 29 August 2007, 15:15
Quantum superconducting circuits are presently the most successful solid
state devices for quantum information processing. Recently, a new
generation of Josephson elements has been developed based on
semiconducting nanowires and carbon nanotubes. A novel type of
superconducting qubit will be discussed in the talk, based on Andreev
quantization in mesoscopic Josephson contacts. Such contacts present a
sort of artificial atoms with sets of discrete levels, strong coupling of
which to the Josephson current provides access to the levels both for the
manipulation and measurement. We discuss the ways of manipulating and
measuring the Andreev states in quantum point contacts with non-magnetic,
and magnetic scatterers.
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