Manipulation and readout of deep-submicron Nb-trilayer-based persistent-current qubits

ORAL

Abstract

Lithographically patterned persistent-current (PC) qubits are promising candidates for realizing a large-scale quantum computer. While challenging to fabricate in a trilayer technology, deep-submicron Josephson junctions (JJs) are required to realize large qubit tunnel-couplings and allow improved immunity to dielectric-induced decoherence. Here, we present recent results on the measurement and characterization of PC qubits designed with deep-submicron JJs and fabricated with Nb-Al/AlOx-Nb trilayers.

*This work is supported in part by the AFOSR grant F49620-01-1-0457 under the DoD University Research Initiative on Nanotechnology (DURINT) Program and the AFOSR/NM grant FA 9550-04-1-0221.

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Authors

  • David M. Berns

  • Sergio O. Valenzuela

    • MIT
    • Physics Department, Harvard University, Cambridge MA 02138, USA

  • William Oliver

    • MIT Lincoln Laboratory
    • MIT Lincoln Laboratories

  • Terry Orlando

    • MIT
    • MIT EECS Department