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Spin Coupled Quantum Dots
Path integral calculation of exchange coupling of spins in neighboring quantum dots.
Launch Tool
Archive Version 1.0
Published on 05 Aug 2008
Latest version: 1.0w. All versions
doi:10.4231/D3GF0MW02 cite this
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Abstract
This tool illustrates the calculation of spin coupling in neighboring quantum dots. The theory behind this calculation is described in “Path integral study of the role of correlation in exchange coupling
in quantum dots and optical lattices,” by Lei Zhang, M. J. Gilbert, and J. Shumway (submitted, 2008). The model is a double parabolic quantum dot, and the user may adjust several parameters, including:
- The dot separation distance.
- The electron effective mass.
- The dielectric constant.
- The interacting charge density in cm-2.
- The spin coupling J in meV.
- The correlation hole when one electron is passing between the dots.
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“pi”: our group’s open-source path integral Monte Carlo program.
The full path integral simulation tool available as app-pimc on nanoHUB.
Credits
Developed by John Shumway in the Department of Physics at Arizona State University.
Sponsored by
Work supported by NSF Grant No. DMR 0239819 and NRI-SWAN.
References
- “Path integral study of the role of correlation in exchange coupling in quantum dots and optical lattices,” by Lei Zhang, M. J. Gilbert, and J. Shumway (submitted, 2008).
- Double dot model is from: J. Pedersen, C. Flindt, N. A. Mortensen, and A.-P. Jauho, Phys. Rev. B 76, 125323 (2007).
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