Generation of three-qubit entangled states using superconducting phase qubits

Nature

Volumn 467, Issue 7315, 2010, Pages 570-573

  Neeley, Matthew ^a   Bialczak, Radoslaw C ^a   Lenander, M ^a   Lucero, E ^a   Mariantoni, Matteo ^a   Oconnell, A D ^a   Sank, D ^a   Wang, H ^a   Weides, M ^a   Wenner, J ^a   Yin, Y ^a   Yamamoto, T ^a,b   Cleland, A N ^a   Martinis, John M ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b NEC CORPORATION   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

ALGORITHM; QUANTUM MECHANICS; SUPERCONDUCTIVITY;

ALGORITHM; ARTICLE; MEASUREMENT; PRIORITY JOURNAL; QUANTUM MECHANICS; SUPERCONDUCTOR; TOMOGRAPHY;

EID: 77957345968     PISSN: 00280836     EISSN: 14764687     Source Type: Journal    
DOI: 10.1038/nature09418     Document Type: Article

References (24)

1. Nielsen, M. A. and Chuang, I. L. Quantum Computation and Quantum Information (Cambridge Univ. Press, 2000).
2. Ladd, T. D. et al. Quantum computers. Nature 464, 45-53 (2010).
3. Clarke, J.&Wilhelm, F. K.Superconductingquantumbits.Nature 453, 1031-1042 (2008).
4. Ansmann, M. et al. Violation of Bells inequality in Josephson phase qubits. Nature 461, 504-506 (2009).
5. DiCarlo, L. et al. Demonstration of two-qubit algorithms with a superconducting quantum processor. Nature 460, 240-244 (2009).
6. Dü r, W., Vidal, G. and Cirac, J. I. Three qubits can be entangled in two inequivalent ways. Phys. Rev. A 62, 062314 (2000).
7. McDermott, R. et al. Simultaneous state measurement of coupled Josephson phase qubits. Science 307, 1299-1302 (2005).
8. Steffen, M. et al.Measurement of the entanglement of two superconducting qubits via state tomography. Science 313, 1423-1425 (2006).
9. Aćn, A., Bruss, D., Lewenstein, M. and Sanpera, A. Classification of mixed three-qubit states. Phys. Rev. Lett. 87, 040401 (2001).
10. Barenco, A. et al. Elementary gates for quantum computation. Phys. Rev. A 52, 3457-3467 (1995).
11. Shi, Y. Both Toffoli and controlled-NOT need little help to do universal quantum computation. Quantum Inf. Comput. 3, 84-92 (2003).
12. Lanyon, B. P. et al. Simplifying quantum logic using higher-dimensional Hilbert spaces. Nature Phys. 5, 134-140 (2008).
13. Monz, T. et al. Realization of the quantum Toffoli gate with trapped ions. Phys. Rev. Lett. 102, 040501 (2009).
14. Cory, D. G. et al. Experimental quantum error correction. Phys. Rev. Lett. 81, 2152-2155 (1998).
15. Galiautdinov, A. and Martinis, J. M. Maximally entangling tripartite protocols for Josephson phase qubits. Phys. Rev. A 78, 010305 (2008).
16. DiCarlo, L. et al. Preparation and measurement of three-qubit entanglement in a superconducting circuit. Nature doi:10.1038/nature09416 (this issue).
17. Wei, L. F., Liu, Y. X. and Nori, F. Generation and control of Greenberger-Horne- Zeilinger entanglement in superconducting circuits. Phys. Rev. Lett. 96, 246803 (2006).
18. Matsuo, S. et al. Generation of macroscopic entangled states in coupled superconducting phase qubits. J. Phys. Soc. Jpn 76, 054802 (2007).
19. Schuch, N. and Siewert, J. Natural two-qubit gate for quantum computation using the XY interaction. Phys. Rev. A 67, 032301 (2003).
20. Lucero, E. et al. High-fidelity gates in a single Josephson qubit. Phys. Rev. Lett. 100, 247001 (2008).
21. Neeley, M. et al. Emulation of a quantumspin with a superconducting phase qudit. Science 325, 722-725 (2009).
22. Hofheinz, M. et al. Synthesizing arbitrary quantum states in a superconducting resonator. Nature 459, 546-549 (2009).
23. Mermin, N. D. Extreme quantum entanglement in a superposition of macroscopically distinct states. Phys. Rev. Lett. 65, 1838-1840 (1990).
24. Pan, J.-W., Bouwmeester, D., Daniell, M., Weinfurter, H. and Zeilinger, A. Experimental test of quantum nonlocality in three-photon Greenberger-Horne- Zeilinger entanglement. Nature 403, 515-519 (2000).