Counting Individual Electrons on Liquid Helium

Details Counting Individual Electrons on Liquid Helium Counting Individual Electrons on Liquid Helium

2004-05-05

arxiv.org/abs/cond-mat/0405084v1

Physics

Condensed Matter

Other Condensed Matter

15 pages, 5 figures

Scientific paper

10.1063/1.1900301

We show that small numbers of electrons, including a single electron, can be held in a novel electrostatic trap above the surface of superfluid helium. A potential well is created using microfabricated electrodes in a 5 micron diameter pool of helium. Electrons are injected into the trap from an electron reservoir on a helium microchannel. They are individually detected using a superconducting single-electron transistor (SET) as an electrometer. A Coulomb staircase is observed as electrons leave the trap one-by-one until the trap is empty. A design for a scalable quantum information processor using arrays of electron traps is presented

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