Call for Papers - Educational Administration: Theory and Practice, E-ISSN: 21...
ECE462 yashashree
1. Quantum Computer Aided Design Simulation and
Optimization of Semiconductor Quantum Dots
Presented
by
Yashashree Wase
Graduate Student in Electrical and Computer Engineering
Contact: ywase@uidaho.edu
5/19/2016 2:58 AM 1
2. Outline
• Glossary of Terms
• Introduction to QCAD
• QCAD simulator code structure
• Three core physical solvers
• Application examples
• Summary
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3. Glossary
• Qubit: Unit of quantum information in quantum
computing. Superposition of 0s and 1s at the same time
• Quantum dots (QD): Physical(energy) confinement to get
atomic-like structure. Artificial atom. QDs are much more
flexible than atoms.
• Double quantum dots (DQD): Two lateral quantum dots
coupled in series to avoid the effect of background spins
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4. Quantum Computer Aided Design (QCAD)
• Challenges in modeling QDs
• QCAD simulator targets modeling multi-dimensional
quantum devices developed for qubit application.
• It is integrated open-source finite-element-based tool
• Simulate experimental QDs to provide feedback and
guidance for experiment.
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5. QCAD Code Structure
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Source: Gao, X. and Nielsen, E. and Muller, R. P. and Young, R. W. and Salinger, A. G. and Bishop, N. C. and Lilly, M. P. and Carroll, M. S., Quantum
computer aided design simulation and optimization of semiconductor quantum dots, Journal of Applied Physics, 114, 164302 (2013)
•Easy scripting ability
•Solves set of equations
•Extended problem space
•High simulation throughput
•Parallel computing
8. QD Capacitance
• QCADs ability to
compute the
capacitance between
a quantum dot and a
control gate
• Constraint one
electron in a dot
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9. DQD Optimization
• QCADs ability to
asses and improve
upon the design of
nano-scale devices
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10. Summary
• QCAD software tool developed enables design comparison
and guidance for semiconductor quantum dot devices
• High throughput of simulations through scripting,
automated meshing and web portal allows fast feedback
to experimentalist
• Self-consistent quantum models in QCAD allows for
analysis of quantum effects on device behavior (cap.etc)
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