Microscopic theory for the charge stability diagram of coupled quantum dot systems
ORAL
Abstract
We present a quantitative microscopic theory for the charge stability diagram of coupled quantum dot systems. Using the configuration interaction method we obtain a generalized Hubbard model, from which the charge stability diagram is calculated and compared with experiments. We establish an exact connection between experimental measurements and the microscopic theory, and predict some experimentally observable quantum effects. We also map the classical capacitance model to the extended Hubbard model, and argue that the effect of spin-exchange and various hopping terms cannot be expressed in the capacitance model.
*This work is supported by LPS-CMTC, IARPA, and CNAM.
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Authors
Shuo Yang
Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD 20742
Condensed Matter Theory Center, Department of Physics, University of Maryland
Xin Wang
Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD 20742
Condensed Matter Theory Center, Department of Physics, University of Maryland
University of Maryland
Sankar Das Sarma
Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD 20742
Condensed Matter Theory Center, Department of Physics, University of Maryland
Univ of Maryland-College Park
Condensed Matter Theory Center, Dept. of Physics, University of Maryland, College Park, MD
CMTC, Dept of Physics, University of Maryland, College Park
Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA
Condensed Matter Theory Center, University of Maryland, College Park
Dep. of Physics, Condensed Matter Theory Center, University of Maryland, College Park, Maryland
University of Maryland
JQI and CMTC, University of Maryland
Joint Quantum Institute and Condensed Matter Theory Center, University of Maryland
