Phonon decoherence of a double quantum dot charge qubit

Journal Article

We study decoherence of a quantum dot charge qubit due to coupling to piezoelectric acoustic phonons in the Born-Markov approximation. After including appropriate form factors, we find that phonon decoherence rates are one to two orders of magnitude weaker than was previously predicted. We calculate the dependence of the Q factor on lattice temperature, quantum dot size, and interdot coupling. Our results suggest that mechanisms other than phonon decoherence play a more significant role in current experimental setups. © 2005 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Vorojtsov, S; Mucciolo, ER; Baranger, HU

Published Date

  • January 1, 2005

Published In

Volume / Issue

  • 71 / 20

Electronic International Standard Serial Number (EISSN)

  • 1550-235X

International Standard Serial Number (ISSN)

  • 1098-0121

Digital Object Identifier (DOI)

  • 10.1103/PhysRevB.71.205322

Citation Source

  • Scopus