Phonon-Induced Pure Dephasing of Two-Electron Spin States in Vertical Quantum Dot Molecules

• Authors: K. Roszak , P. Machnikowski
• Languages of publication: EN

Abstracts

EN

Phonon-induced dephasing of two-electron spin states in two vertically stacked self-assembled GaAs/InGaAs quantum dots is studied. A pure dephasing process due to elastic phonon scattering is found to dominate at low temperatures. This process is independent of the spin-orbit coupling and does not require the presence of a magnetic field. It relies on interdot tunneling and the Pauli principle, which make the double quantum dot gate for spin based quantum computing possible, and therefore cannot be avoided.

Keywords

EN

73.21.La; 03.65.Yz; 72.10.Di; 03.67.Lx

Discipline

• 03.65.Yz: Decoherence; open systems; quantum statistical methods(see also 03.67.Pp in quantum information; for decoherence in Bose-Einstein condensates, see 03.75.Gg)
• 03.67.Lx: Quantum computation architectures and implementations
• 73.21.La: Quantum dots
• 72.10.Di: Scattering by phonons, magnons, and other nonlocalized excitations(see also 71.45.-d Collective effects in electronic structure of bulk materials)

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 5
• Pages: 877-878

Dates

published

2009-11

Contributors

author

K. Roszak

• Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, 12116 Prague, Czech Republic
• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

P. Machnikowski

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.116.877