Publikation:

Measurement of the Entanglement of Two Superconducting Qubits via State Tomography

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Steffen_252936.pdf
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2006

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

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http://nbn-resolving.de/urn:nbn:de:bsz:352-252936
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https://doi.org/10.1126/science.1130886
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Science. 2006, 313(5792), pp. 1423-1425. ISSN 0036-8075. eISSN 1095-9203. Available under: doi: 10.1126/science.1130886

Zusammenfassung

Demonstration of quantum entanglement, a key resource in quantum computation arising from a nonclassical correlation of states, requires complete measurement of all states in varying bases. By using simultaneous measurement and state tomography, we demonstrated entanglement between two solid-state qubits. Single qubit operations and capacitive coupling between two super-conducting phase qubits were used to generate a Bell-type state. Full two-qubit tomography yielded a density matrix showing an entangled state with fidelity up to 87%. Our results demonstrate a high degree of unitary control of the system, indicating that larger implementations are within reach.

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ISO 690STEFFEN, Matthias, M. ANSMANN, Radoslaw C. BIALCZAK, Nadav KATZ, Erik LUCERO, R. MCDERMOTT, Matthew NEELEY, Eva M. WEIG, Andrew N. CLELAND, John M. MARTINIS, 2006. Measurement of the Entanglement of Two Superconducting Qubits via State Tomography. In: Science. 2006, 313(5792), pp. 1423-1425. ISSN 0036-8075. eISSN 1095-9203. Available under: doi: 10.1126/science.1130886
BibTex
@article{Steffen2006-09-08Measu-25293,
  year={2006},
  doi={10.1126/science.1130886},
  title={Measurement of the Entanglement of Two Superconducting Qubits via State Tomography},
  number={5792},
  volume={313},
  issn={0036-8075},
  journal={Science},
  pages={1423--1425},
  author={Steffen, Matthias and Ansmann, M. and Bialczak, Radoslaw C. and Katz, Nadav and Lucero, Erik and McDermott, R. and Neeley, Matthew and Weig, Eva M. and Cleland, Andrew N. and Martinis, John M.}
}
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