Pauli Virtanen, Patrik Recher
We consider microwave spectroscopy of Josephon junctions composed of hybridized Majorana states in topological 1-D superconductors. We point out how spectroscopic features of the junction appear in the current phase relation under microwave irradiation. Moreover, we discuss a way to directly probe the nonequilibrium state associated with the 4{\pi} periodic Josephson effect. In particular, we show how the microwave driving can be used to switch from a 4{\pi} to a 2{\pi} Shapiro step in the current voltage relation.
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http://arxiv.org/abs/1303.2353
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