Spin-based quantum computing using electrons on liquid helium

Research output: Contribution to journalArticle

56 Scopus citations

Abstract

Numerous physical systems have been proposed for constructing quantum computers, but formidable obstacles stand in the way of making even modest systems with a few hundred quantum bits (qubits). Several approaches utilize the spin of an electron as the qubit. Here it is suggested that the spin of electrons floating on the surface of liquid helium will make excellent qubits. These electrons can be electrostatically held and manipulated much like electrons in semiconductor heterostructures, but being in a vacuum the spins on helium suffer much less decoherence. In particular, the spin-orbit interaction is reduced so that moving the qubits with voltages applied to gates has little effect on their coherence. Remaining sources of decoherence are considered, and it is found that coherence times for electron spins on helium can be expected to exceed 100 s. It is shown how to obtain a controlled-NOT operation between two qubits using the magnetic dipole-dipole interaction.

Original languageEnglish (US)
Article number052338
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number5
DOIs
StatePublished - Dec 11 2006

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Spin-based quantum computing using electrons on liquid helium'. Together they form a unique fingerprint.

  • Cite this