Decoherence in Nearly-Isolated Quantum Dots

J.  Folk; C. M. Marcus; J.  Harris jr

doi:10.1103/PhysRevLett.87.206802

Decoherence in Nearly-Isolated Quantum Dots

J. Folk, C. M. Marcus, J. Harris jr

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Abstract

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.

Original language	Undefined/Unknown
Journal	Physical Review Letters
Volume	87
Issue number	20
Pages (from-to)	2066802
Number of pages	4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.87.206802
Publication status	Published - 3 Aug 2000

Keywords

cond-mat.mes-hall
cond-mat.stat-mech

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10.1103/PhysRevLett.87.206802

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Cite this

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title = "Decoherence in Nearly-Isolated Quantum Dots",

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AB - 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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