Quantum dot charge stability diagram from a generalized Hubbard model
ORAL
Abstract
We develop a theory for the charge stability diagram in solid state quantum dot spin qubits using a general form of the Hubbard model. We argue that the extended Hubbard model (with both on-site and inter-site Coulomb repulsion) is the minimal model to describe the system. The appropriate parameters of the Hubbard model can be read off by comparing our theoretically derived results with the experimental charge stability plots. We make predictions on how the charge stability diagram depends on various parameters of the Hubbard model, especially the spin-exchange and hopping energies.
*This work is supported by IARPA, LPS-CMTC, and CNAM.
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Authors
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
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
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
