Download Macroscopic Quantum Coherence and Quantum Computing by A. J. Leggett (auth.), Dmitri V. Averin, Berardo Ruggiero, PDF

By A. J. Leggett (auth.), Dmitri V. Averin, Berardo Ruggiero, Paolo Silvestrini (eds.)

This quantity is an outgrowth of the second one foreign Workshop on Macroscopic Quantum Coherence and Computing held in Napoli, Italy, in June 2000. This workshop accumulated a few specialists from the most important Universities and study associations of a number of nations. the alternative of the positioning, which acknowledges the function and the traditions of Naples during this box, assured the individuals a stimulating surroundings. the purpose of the workshop has been to document at the contemporary theoretical and experimental effects at the macroscopic quantum coherence of macroscopic platforms. specific realization used to be dedicated to Josephson units. The correlation with different atomic and molecular platforms, displaying a macroscopic quantum behaviour, was once additionally mentioned. The seminars supplied either old assessment and up to date theoretical flooring at the subject, in addition to info on new experimental effects relative to the quantum computing quarter. the 1st workshop in this subject, held in Napoli in 1998, has been ennobled through vital stories on observations of Macroscopic Quantum Coherence in mesoscopic structures. the present workshop proposed, between many stimulating effects, the 1st observations of Macroscopic Quantum Coherence among macroscopically certain fluxoid states in rf SQUIDs, twenty years after the Leggett's thought to experimentally try the quantum habit of macroscopic platforms. stories on observations of quantum behaviour in molecular and magnetic platforms, small Josephson units, quantum dots have additionally been fairly stimulating in view of the conclusion of numerous attainable q-bits.

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E to the charge fluctuations. The fact that the single-pulse experiment showed a longer decay time than the two-pulse experiment is consistent with this explanation. A technique similar to the spin-echo experiment in NMR will be able to remove the low-frequency contribution and increase the lifetime of the observed oscillations. 4. qe accnmulation during the delay time between the two pulses. 'ling is significant. Such a decoherence factor could pose a serious problem to the implementation of solid-state qubits related to the charge degree of freedom.

Rev. Lett. 79, 3046 (1997). BOSE-EINSTEIN CONDENSATION WITH ATTRACTIVE INTERACTION FATE OF A FALSE VACUUM Masahito Veda! and Hiroki Sait02 IDepartment of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan 2Institute of Physics, University of Tokyo, Tokyo 153-8902, Japan Abstract Among the species that have Bose-condensed, lithium 7 and rubidium 85 form unique condensates in that atoms interact attractively and that the energy barrier that stabilizes the gaseous Bose-Einstein condensates originates from the zero-point motion of atoms.

22] Y. Nakamura, Yu. A. T. S. Tsai, Nature 398, 786 (1999). [23] C. H. J. E. Mooij, J. Supercond. 12,807 (1999). J. , Rev. Mod. Phys. 59, 1 (1987). [25] N. Prokof'ev, P. Stamp, Rep. Prog. Phys. 63, 669 (2000). [26] L. , to be published; cond-mat/9910062. [27] P. , Phys. Rev. Lett. 79, 3046 (1997). BOSE-EINSTEIN CONDENSATION WITH ATTRACTIVE INTERACTION FATE OF A FALSE VACUUM Masahito Veda! and Hiroki Sait02 IDepartment of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan 2Institute of Physics, University of Tokyo, Tokyo 153-8902, Japan Abstract Among the species that have Bose-condensed, lithium 7 and rubidium 85 form unique condensates in that atoms interact attractively and that the energy barrier that stabilizes the gaseous Bose-Einstein condensates originates from the zero-point motion of atoms.

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