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Adiabatic switching in coupled quantum dot systems facilitated by the coexistence of “molecular” and “atomic” states

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3 Author(s)
Akis, R. ; Department of Electrical Engineering and Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287-5706 ; Vasileska, D. ; Ferry, D.K.

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We model a double quantum dot system defined by a split metal gate over a GaAs/AlGaAs heterostructure, with the dots being coupled via a quantum point contact. Hybridization effects analogous to that of molecules are apparent. However, contrary to some previous studies, we find that there can be a coexistence of “atomic” and “molecular” regimes. The resulting behavior may be utilized to create a device that switches adiabatically, providing a possible route to dissipation-free computing. © 2002 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:80 ,  Issue: 23 )

Date of Publication:

Jun 2002

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