https://doi.org/10.1140/epjb/e2004-00091-3
Experimental test of a superconducting digital interface for vortex qubits
1
Superconductor Technologies Inc., 969 West Maude
Avenue, Sunnyvale, CA 94086, USA
2
Physikalisches Institut III,
Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058
Erlangen, Germany
Corresponding author: a ustinov@physik.uni-erlangen.de
Received:
16
January
2004
Published online:
20
April
2004
We have developed and tested a classical superconducting logic interface to a qubit prototype based on two macroscopically distinct quantum states of a vortex in a long Josephson junction. The initial state preparation as well as the readout of a qubit is demonstrated by using a relatively simple Rapid Single Flux Quantum (RSFQ) circuit. RSFQ logic appears as a very feasible choice for constructing an interface between superconducting qubits and room-temperature electronics.
PACS: 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.) / 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 74.78.-w – Superconducting films and low-dimensional structures
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
