Counting individual trapped electrons on liquid helium

G. Papageorgiou, P. Glasson, K. Harrabi, V. Antonov, E. Collin, P. Fozooni, P. G. Frayne, M. J. Lea, D. G. Rees, Y. Mukharsky

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We show that small numbers of electrons, including a single isolated electron, can be held in an electrostatic trap above the surface of superfluid helium. A potential well is created using microfabricated electrodes in a 5 μm 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 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 an array of electron traps is presented.

Original languageEnglish
Article number153106
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number15
Publication statusPublished - 2005
Externally publishedYes


Dive into the research topics of 'Counting individual trapped electrons on liquid helium'. Together they form a unique fingerprint.

Cite this