Decoherence in Nearly-Isolated Quantum Dots

Details Decoherence in Nearly-Isolated Quantum Dots Decoherence in Nearly-Isolated Quantum Dots

2000-08-03

arxiv.org/abs/cond-mat/0008052v2

Phys. Rev. Lett. 87, 206802 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Significant revisions to include comparison to theory. Related papers available at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.87.206802

Decoherence in nearly-isolated GaAs quantum dots is investigated using the change in average Coulomb blockade peak height upon breaking time-reversal symmetry. The normalized change in average peak height approaches the predicted universal value of 1/4 at temperatures well below the single-particle level spacing, but is greatly suppressed for temperature greater than the level spacing, suggesting that inelastic scattering or other dephasing mechanisms dominate in this regime.

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