Reading out charge qubits with a radio-frequency single-electron-transistor

K. Bladh; D. Gunnarsson; G. Johansson; A. Käck; G. Wendin; A. Aassime; M. Taslakov; P. Delsing

Reading out charge qubits with a radio-frequency single-electron-transistor

K. Bladh^*, D. Gunnarsson, G. Johansson, A. Käck, G. Wendin, A. Aassime, M. Taslakov, P. Delsing

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

Abstract

We describe fabrication and measurements of Single Electron Transistors operated in the Radio Frequency mode (RF-SET). We demonstrate very high sensitivity for RF-SETs and we evaluate the back-action from an RF-SET, when used as a read-out device for charge qubits. We conclude that single-shot read-out is possible with a signal to noise ratio greater than one, and that niobium qubits would substantially improve the signal to noise ratio. Furthermore we describe how the RF-SET could be used to read out a differential qubit in a gradiometer coupling.

Original language	English
Pages (from-to)	167-172
Number of pages	6
Journal	Physica Scripta
Volume	102
State	Published - 2002
Externally published	Yes
Event	Proceedings of the Nobel Jubilee Symposium: Condensation and Coherence in Condensed Matter - Goteborg, Sweden Duration: 4 Dec 2001 → 7 Dec 2001

Cite this

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title = "Reading out charge qubits with a radio-frequency single-electron-transistor",

abstract = "We describe fabrication and measurements of Single Electron Transistors operated in the Radio Frequency mode (RF-SET). We demonstrate very high sensitivity for RF-SETs and we evaluate the back-action from an RF-SET, when used as a read-out device for charge qubits. We conclude that single-shot read-out is possible with a signal to noise ratio greater than one, and that niobium qubits would substantially improve the signal to noise ratio. Furthermore we describe how the RF-SET could be used to read out a differential qubit in a gradiometer coupling.",

author = "K. Bladh and D. Gunnarsson and G. Johansson and A. K{\"a}ck and G. Wendin and A. Aassime and M. Taslakov and P. Delsing",

year = "2002",

language = "אנגלית",

volume = "102",

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T1 - Reading out charge qubits with a radio-frequency single-electron-transistor

AU - Bladh, K.

AU - Gunnarsson, D.

AU - Johansson, G.

AU - Käck, A.

AU - Wendin, G.

AU - Aassime, A.

AU - Taslakov, M.

AU - Delsing, P.

PY - 2002

Y1 - 2002

N2 - We describe fabrication and measurements of Single Electron Transistors operated in the Radio Frequency mode (RF-SET). We demonstrate very high sensitivity for RF-SETs and we evaluate the back-action from an RF-SET, when used as a read-out device for charge qubits. We conclude that single-shot read-out is possible with a signal to noise ratio greater than one, and that niobium qubits would substantially improve the signal to noise ratio. Furthermore we describe how the RF-SET could be used to read out a differential qubit in a gradiometer coupling.

AB - We describe fabrication and measurements of Single Electron Transistors operated in the Radio Frequency mode (RF-SET). We demonstrate very high sensitivity for RF-SETs and we evaluate the back-action from an RF-SET, when used as a read-out device for charge qubits. We conclude that single-shot read-out is possible with a signal to noise ratio greater than one, and that niobium qubits would substantially improve the signal to noise ratio. Furthermore we describe how the RF-SET could be used to read out a differential qubit in a gradiometer coupling.

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SN - 0281-1847

VL - 102

SP - 167

EP - 172

JO - Physica Scripta

JF - Physica Scripta

T2 - Proceedings of the Nobel Jubilee Symposium: Condensation and Coherence in Condensed Matter

Y2 - 4 December 2001 through 7 December 2001

ER -

Reading out charge qubits with a radio-frequency single-electron-transistor

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