SET Backaction on the Single Electron Box

Details SET Backaction on the Single Electron Box SET Backaction on the Single Electron Box

2005-01-20

arxiv.org/abs/cond-mat/0501504v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 Pages, 4 figures submitted to Physical Review B

Scientific paper

We report an experimental observation of the backaction of a Single Electron Transistor (SET) measuring the Coulomb staircase of a single electron box. As current flows through the SET, the charge state of the SET island fluctuates. These fluctuations capacitively couple to the box and cause changes in the position, width, and asymmetry of the Coulomb staircase. A sequential tunnelling model accurately recreates these effects, confirming this mechanism of the backaction of an SET. This is a first step towards understanding the effects of quantum measurement on solid state qubits.

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