Experimental test of a superconducting digital interface for vortex qubits |
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Authors: | V?K?Kaplunenko Email author" target="_blank">A?V?UstinovEmail author |
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Institution: | (1) Superconductor Technologies Inc., 969 West Maude Avenue, CA 94086 Sunnyvale, USA;(2) Physikalisches Institut III, Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen, Germany |
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Abstract: | 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.Received: 16 January 2004, Published online: 20 April 2004PACS:
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 |
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