Electric Field Control of Magnetic Coupling in a Double Quantum Dot System and Related Parasitic Electric Dipole Effect

• Authors: Z. Bak
• Languages of publication: EN

Abstracts

EN

We prove that tunable magnetic interaction in a two-qubit spintronic device can arise due to the mutual competition of the Ruderman-Kittel-Kasuya-Yosida and double-exchange interactions. The values of induced electric dipoles (which arise when magnetic coupling is manipulated by the electric field) are calculated. We show that the dissipation of the energy during logic operations due to these parasitic dipoles can destroy quantum coherence in any quantum dot system.

Keywords

EN

73.21.La; 73.90.+f; 75.75.Lf

Discipline

• 75.75.Lf: Electronic structure of magnetic nanoparticles
• 73.90.+f: Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures (Restricted to new topics in section 73)
• 73.21.La: Quantum dots

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 957-958

Dates

published

2010-11

Contributors

author

Z. Bak

• Institute of Physics, Jan Długosz University of Częstochowa, al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.118.957