Superconducting quantum computing

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This promising implementation of quantum information involves nanofabricated superconducting electrodes coupled through Josephson junctions. As in a superconducting electrode, the phase and the charge are conjugate variables, there exists three families of superconducting qubits, depending if the charge, the phase or neither of the two are good quantum numbers. This refers respectively to charge Qubits, flux Qubits, and hybrid qubits.

[edit] Journal articles on Superconducting qubits

• V. Bouchiat, D. Vion, P. Joyez, D. Esteve and M.H. Devoret, Quantum coherence with a single Cooper pair, Physica Scripta T76 165 (1998).
• Y. Nakamura, Yu. A. Pashkin, and J. S. Tsai. Coherent control of macroscopic quantum states in a single-Cooper-pair box. Nature 398, 786 (1999).
• D. Vion et al.. Manipulating the quantum state of an electrical circuit. Science 296, 886 (2002).
• J. M. Martinis, S. Nam, J. Aumentado, and C. Urbina. Rabi oscillations in a large Josephson-junction qubit. Phys. Rev. Lett. 89, 117901 (2002).
• I. Chiorescu, Y. Nakamura, C. J. P. M. Harmans, and J. E. Mooij. Coherent quantum dynamics of a superconducting flux qubit. Science 299, 1869 (2003).
• T. Duty, D. Gunnarsson, K. Bladh, and P. Delsing, Phys. Rev. B 69, 140503(R) (2004).
• A. Wallraff, D. I. Schuster, A. Blais, L. Frunzio, R.-S. Huang, J. Majer, S. Kumar, S. M. Girvin and R. J. Schoelkopf. Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics. Nature 431, 162 (2004).
• V.T. Petrashov, K.G. Chua, K.M.Marshall, R. Sh. Shaikhaidarov and J. T. Nicholls. Andreev Probe of Persistent Current States In Superconducting Quantum Circuits. Phys. Rev. Lett 95, 147001 (2005).

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