Sub-flux quantum generator

Details Sub-flux quantum generator Sub-flux quantum generator

2005-04-26

2005-04-26

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

With particular solid state devices

C257S031000

Reexamination Certificate

active

06885325

ABSTRACT:
A sub-flux quantum generator includes an N-turn ring having a plurality of connected turns about a common aperture. The width of each respective turn in the N-turn ring exceeds the London penetration depth of a superconducting material used to make the respective turn. The generator includes a switching device configured to introduce a reversible localized break in the superconductivity of at least one turn in the N-turn ring. The generator includes a magnetism device configured to generate a magnetic field within the aperture of the N-turn ring. A method for biasing a superconducting structure that encompasses all or a portion of an N-turn ring. While a supercurrent is flowing through the N-turn ring, a quantized magnetic flux is introduced into the aperture of the N-turn ring using a reversible localized break in a turn in the ring. The quantized magnetic flux is trapped in the ring by removal of the localized break. The trapped flux biases the superconducting structure.

REFERENCES:
patent: 4028714 (1977-06-01), Henkels
patent: 5162731 (1992-11-01), Fujimaki
patent: 5329165 (1994-07-01), Kao et al.
patent: 6495854 (2002-12-01), Newns et al.
patent: 6504172 (2003-01-01), Zagoskin et al.
patent: 6563310 (2003-05-01), Zagoskin
patent: 6728131 (2004-04-01), Ustinov
patent: 20020117656 (2002-08-01), Amin et al.
patent: 20020188578 (2002-12-01), Amin et al.
patent: 20030071258 (2003-04-01), Zagoskin et al.
patent: 20030193097 (2003-10-01), Il'ichev et al.
patent: 20040000666 (2004-01-01), Lidar et al.
patent: 20040071019 (2004-04-01), Magnus et al.
Barone, A., T. Hakioglu, and I.O. Kulik, 2002, “Quantum Computation with Aharonov-Bohm Qubits” ArXiv.org preprint server: cond-mat/ 0203038, last accessed on Jul. 27, 2004.
Bocko, M.F., A.M. Herr, and M.J. Feldman, 1997, “Prospects for quantum coherent computation using superconducting electronics,” IEEE Trans. Appl. Supercond. 7, pp. 3638-3641.
Cottet, A., D. Vion, A. Aassime, P. Joyez, D. Esteve, and M.H. Devoret, 2002, “Implementation of a combined charge-phase quantum bit in a superconducting circuit,” Physica C 367, pp. 197-203.
DiVincenzo, D.P., 2000, “The Physical Implementation of Quantum Computational,” ArXiv.org preprint server: quant-ph/0002077, last accessed on Jul. 27, 2004. 1 page.
Ketchen, M.B., 1987, “Integrated Thin Film dc-SQUID senors,” IEEE Transactions on Magnetics 23, pp. 1650-1657.
Hu, X., R. de Sousa, and S. Das Sarma, “Decoherence and dephasing in spin-based solid state quantum computers,” arXiv.org:cond-mat/0108339 (2001), website last accessed on Jul. 27, 2004, 1 page.
Majer, J.B., J.R. Butcher, and J.E. Mooij, 2002, “Simple phase bias for superconducting circuits,” Applied Physics Letters 80 pp. 3638-3640.
Olariu, S., and I.I. Popescu, 1985, “The quantum effects of electromagnetic fluxes,” Rev. Mod. Phys. 57, pp. 339-436 and 13 pages of figures.
Nakamura, Y., Yu.A. Pashkin, and J.S. Tsai, 1999, “Coherent control of macroscopic quantum states in a single-Cooper-pair box,” Nature 398, pp. 786-788.
Lidar, D.A., and L.-A. Wu, 2002, “Reducing Constraints on Quantum Computer Design by Encoded Selective Recoupling,” Phys. Rev. Lett. 88, 017905, pp. 1-4.
Lidar, D.A., L.-A. Wu, and A. Blais, 2002, “Quantum Codes for Simplifying Design and Suppressing Decoherence in Superconducting Phase-Qubits,” Quant. Inf. Proc. 1, pp. 155-182.
Makhlin, Y., G. Schön, and A. Shnirman, 2001, “Quantum-state engineering with Josephson-junction devices,” Rev. Mod. Phys. 73, pp. 357-400.
Mooij, J.E., T.P. Orlando, L. Levitov, L. Tian, C.H. van der Wal, and S. Lloyd, 1999, “Josephson persistant-current qubit,” Science 285, pp. 1036-1039.
Orlando, T.P, 1990,Foundations of Applied Superconductivity, (Addison Wesley, Reading Massachusetts) pp. 90-93, 474-483.
Orlando, T.P, J.E. Mooij, L. Tian, C.H. van der Wal, L.S. Levitov, S. Lloyd, and J.J. Mazo, 1999, “Superconducting persistent-current qubit,” Phys. Rev. B 60, 15398.
W.H. Zurek, 1991, “Decoherence and the transition from quantum to classical,” Physics Today, 44, 10, pp. 36-44.

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