Decoherence in a superconducting quantum bit circuit -: art. no. 134519

被引：496

作者：

Ithier, G ^{[1
]}

Collin, E

Joyez, P

Meeson, PJ

Vion, D

Esteve, D

Chiarello, F

Shnirman, A

Makhlin, Y

Schriefl, J

Schön, G

机构：

[1] CEA Saclay, DRECAM, DSM, Serv Phys Etat Condense,Quantron Grp, F-91191 Gif Sur Yvette, France

[2] Univ London, Royal Holloway, Dept Phys, Egham TW20 0EX, Surrey, England

[3] CNR, Ist Foton & Nanotecnol, I-00156 Rome, Italy

[4] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[5] LD Landau Theoret Phys Inst, Moscow 119334, Russia

[6] Ecole Normale Super Lyon, F-69364 Lyon, France

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.72.134519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Decoherence in quantum bit circuits is presently a major limitation to their use for quantum computing purposes. We present experiments, inspired from NMR, that characterize decoherence in a particular superconducting quantum bit circuit, the quantronium. We introduce a general framework for the analysis of decoherence, based on the spectral densities of the noise sources coupled to the qubit. Analysis of our measurements within this framework indicates a simple model for the noise sources acting on the qubit. We discuss various methods to fight decoherence.

引用

页数：22

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