Conclusions
Recently a.c. measurements were performed15 using the set-up of Ref. [6]. It was observed that an a.c. field renormalizes the tunneling amplitude but it does not affect decoherence. This indicates that decoherence in the set-up of Ref. [6] is mainly due to other sources. On the other hand the a.c. tuneable renormalization of the tunneling amplitude may be used for dynamical fine tuning of the couplings and of time evolution. This is important for procedures where a precise switch off of the couplings is needed. It is finally worth mentioning that the formalism described above can be extended to the case of coupling with a spin-bath7 which models background charges.
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References
Leggett, A.J., 1986. In Directions in Condensed Matter Physics, (G. Grinstein and G. Mazenko Eds.), World Scientific, Singapore, p. 187.
Ekert, A., and Jozsa, R., 1996, Rev. Mod. Phys 68: 733; Bennett, C. H., October 1995, Physics Today, p. 24; Di Vincenzo, D., 1995, Science 270: 25; Steane, A., 1998, Kept. Prog. Phys. 61: 117.
Shor, P.W., 1997, SIAM Joum. Comput. 26: 1487; Grover, L.K., 1997, Phys. Rev. Lett. 79: 325.
Makhlin, Y., Schön, G., and Shnirman, A., 1999, Nature 398. 305.
Averin, D.V., 1998, Sol. State Comm. 105: 659; Mooij, J.E. et al., 1999, Science 285: 1036.
Nakamura, Y., Pashkin, Yu. A., Tsai, J.S., 1999, Nature 398: 786.
Weiss, U., 1999, Quantum Dissipative Systems, World Scientific, Singapore.
Schön, G., Zaikin, A., 1990, Phys. Rep. 198: 237; Mooij, J. E., Schön, G., 1992, in Single Charge Tunneling, NATO ASI Series, Vol. B 294, (H. Grabert and M.H. Devoret, eds.), Plenum Press, New York; 1991, Z. Phys. B — Condensed Matter 85.
Barone, A. and Paternö, G., 1982, Physics and applications of the Josephson effect, J. Wiley & Sons; see also the contribution of A. Barone to this volume.
Bouchiat, V., et al., 1999, Physica Scripta T76: 165.
Fazio, R., Palma, G.M., and Siewert, J., Dec. 20th, 1999, Phys. Rev. Lett.
Leggett, A. J., et al., 1987, Rev. Mod. Phys. 59: 1.
Grifoni M, and Hânggi, P. 1998, Phys. Rep. 304: 229; Hänggi, P., Talkner, P., and Borkovec, M., 1990, Rev. Mod. Phys. 62: 251.
Grifoni, M., Paladino E., and Weiss, U., 1999, Eur. Phys. J. B 10: 719.
Y. Nakamura, private communication.
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Falci, G., Fazio, R., Paladino, E., Weiss, U. (2002). Josephson Qubits For Quantum Computation. In: Martellucci, S., Chester, A.N., Aspect, A., Inguscio, M. (eds) Bose-Einstein Condensates and Atom Lasers. Springer, Boston, MA. https://doi.org/10.1007/0-306-47103-5_18
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DOI: https://doi.org/10.1007/0-306-47103-5_18
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