Decoherence in a superconducting quantum bit circuit

Ithier, Grégoire, Collin, E , Joyez, P , Meeson, P J , Vion, D , Esteve, D , Chiarello, F , Shnirman, A , Makhlin, Y , Schriefl, J and Schon, G

(2005)

Ithier, Grégoire, Collin, E , Joyez, P , Meeson, P J , Vion, D , Esteve, D , Chiarello, F , Shnirman, A , Makhlin, Y , Schriefl, J and Schon, G (2005) Decoherence in a superconducting quantum bit circuit. Physical Review B, 72 (13).

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Abstract

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.

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This is a Submitted version
This version's date is: 10/2005
This item is not peer reviewed

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https://repository.royalholloway.ac.uk/items/280df435-a08b-41ac-1eed-e0c086bbf982/2/

Item TypeJournal Article
TitleDecoherence in a superconducting quantum bit circuit
AuthorsIthier, Grégoire
Collin, E
Joyez, P
Meeson, P J
Vion, D
Esteve, D
Chiarello, F
Shnirman, A
Makhlin, Y
Schriefl, J
Schon, G
Uncontrolled KeywordsLOW-FREQUENCY NOISE, SINGLE-COOPER-PAIR, FLICKER 1/F NOISE, QUBITS, STATES
DepartmentsFaculty of Science\Physics
Research Groups and Centres\Physics\Low Temperature Physics

Identifiers
doihttp://dx.doi.org/10.1103/PhysRevB.72.134519

Deposited by Research Information System (atira) on 07-Jun-2012 in Royal Holloway Research Online.Last modified on 07-Jun-2012

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