Publikation:

State Tomography of Capacitively Shunted Phase Qubits with High Fidelity

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Steffen_252872.pdf
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2006

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Steffen, Matthias
Ansmann, M.
McDermott, R.
Katz, Nadav
Bialczak, Radoslaw C.
Lucero, Erik
Neeley, Matthew
Cleland, Andrew N.
Martinis, John M.

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Physical Review Letters. 2006, 97(5). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.97.050502

Zusammenfassung

We introduce a new design concept for superconducting phase quantum bits (qubits) in which we explicitly separate the capacitive element from the Josephson tunnel junction for improved qubit performance. The number of two-level systems that couple to the qubit is thereby reduced by an order of magnitude and the measurement fidelity improves to 90%. This improved design enables the first demonstration of quantum state tomography with superconducting qubits using single-shot measurements.

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ISO 690STEFFEN, Matthias, M. ANSMANN, R. MCDERMOTT, Nadav KATZ, Radoslaw C. BIALCZAK, Erik LUCERO, Matthew NEELEY, Eva M. WEIG, Andrew N. CLELAND, John M. MARTINIS, 2006. State Tomography of Capacitively Shunted Phase Qubits with High Fidelity. In: Physical Review Letters. 2006, 97(5). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.97.050502
BibTex
@article{Steffen2006State-25287,
  year={2006},
  doi={10.1103/PhysRevLett.97.050502},
  title={State Tomography of Capacitively Shunted Phase Qubits with High Fidelity},
  number={5},
  volume={97},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Steffen, Matthias and Ansmann, M. and McDermott, R. and Katz, Nadav and Bialczak, Radoslaw C. and Lucero, Erik and Neeley, Matthew and Weig, Eva M. and Cleland, Andrew N. and Martinis, John M.}
}
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