Print Email Facebook Twitter Direct Microwave Measurement of Andreev-Bound-State Dynamics in a Semiconductor-Nanowire Josephson Junction Title Direct Microwave Measurement of Andreev-Bound-State Dynamics in a Semiconductor-Nanowire Josephson Junction Author Hays, M. (Yale University) de Lange, G. (TU Delft QRD/Kouwenhoven Lab; Yale University) Serniak, K. (Yale University) van Woerkom, D.J. (TU Delft QRD/Kouwenhoven Lab) Bouman, D. (TU Delft QRD/Kouwenhoven Lab) Krogstrup, P. (University of Copenhagen) Nygård, J. (University of Copenhagen) Geresdi, A. (TU Delft QRD/Geresdi Lab) Devoret, M. H. (Yale University) Date 2018 Abstract The modern understanding of the Josephson effect in mesosopic devices derives from the physics of Andreev bound states, fermionic modes that are localized in a superconducting weak link. Recently, Josephson junctions constructed using semiconducting nanowires have led to the realization of superconducting qubits with gate-tunable Josephson energies. We have used a microwave circuit QED architecture to detect Andreev bound states in such a gate-tunable junction based on an aluminum-proximitized indium arsenide nanowire. We demonstrate coherent manipulation of these bound states, and track the bound-state fermion parity in real time. Individual parity-switching events due to nonequilibrium quasiparticles are observed with a characteristic timescale Tparity=160±10 μs. The Tparity of a topological nanowire junction sets a lower bound on the bandwidth required for control of Majorana bound states. To reference this document use: http://resolver.tudelft.nl/uuid:01242055-c8bb-47a2-a5d4-dbe0877b3537 DOI https://doi.org/10.1103/PhysRevLett.121.047001 ISSN 0031-9007 Source Physical Review Letters, 121 (4) Part of collection Institutional Repository Document type journal article Rights © 2018 M. Hays, G. de Lange, K. Serniak, D.J. van Woerkom, D. Bouman, P. Krogstrup, J. Nygård, A. Geresdi, M. H. Devoret Files PDF PhysRevLett.121.047001.pdf 1.37 MB Close viewer /islandora/object/uuid:01242055-c8bb-47a2-a5d4-dbe0877b3537/datastream/OBJ/view