title: Decoherence in nearly isolated quantum dots.
abstract: Decoherence in nearly isolated GaAs quantum dots is investigated using the change in the average Coulomb blockade peak height when time-reversal symmetry is broken. The normalized change in the average peak height approaches the predicted universal value of 1/4 at temperatures well below the single-particle level spacing, T < Delta, but is greatly suppressed for T > Delta, suggesting that inelastic scattering or other dephasing mechanisms dominate in this regime.
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Folk
authors.forename: C M
authors.initials: CM
authors.lastname: Marcus
authors.forename: J S
authors.initials: JS
authors.lastname: Harris