PL EN


Preferences help
enabled [disable] Abstract
Number of results
2012 | 121 | 5-6 | 1219-1221
Article title

Electron Mediated Mn-Mn Interaction in Quantum Dots

Authors
Content
Title variants
Languages of publication
EN
Abstracts
EN
We present a theoretical study of magnetic interaction in quantum dots with magnetic Mn^{2+} in dot impurities. We show that gate voltage applied to the quantum dot shifts the centers of electron clouds. Exact formulae for the perturbed spin density allow us to derive expression for the change of the strength of the sp-d coupling. Estimations show that sp-d exchange integral is very sensitive to the gate voltage variations. Exact formulae for the change of the effective exchange integrals are derived. As the spin coded qubits are elements of the RAM memory, a part of the energy stored in magnetic coupling will be dissipated when information is written or erased. We estimate this energy and find it sufficiently large to destroy quantum coherence during quantum computing. Finally, we discuss the interdot spin coupling and show the effect of gate voltage operations on the spin intra- and interdot Ruderman-Kittel-Kasuya-Yosida coupling.
Keywords
EN
Year
Volume
121
Issue
5-6
Pages
1219-1221
Physical description
Dates
published
2012-05
References
  • 1. D. Stepanenko, N.E. Bonsteel, D.P. DiVincenzo, G. Burkard, D. Loss, Phys. Rev. B 68, 115306 (2003)
  • 2. A.M. Yakunin, A.Yu. Silov, P.M. Koenrad, J.H. Wolter, W. Van Roy, J. De Boeck, J.-M. Tang, M.E. Flatte, Phys. Rev. Lett. 92, 216806 (2004)
  • 3. W. Xie, Q. Xie, Physica E 404, 1625 (2009)
  • 4. Z. Bak, Acta Phys. Pol. A 118, 957 (2010)
  • 5. F. Qu, P. Hawrylak, Phys. Rev. Lett. 96, 157201 (2006)
  • 6. F. Qu, C. de Almeida, P.C. Morais, J. Magn. Magn. Mater. 320, e412 (2008)
  • 7. E.J. Peter, Phys. Lett. A 355, 59 (2006)
  • 8. S. Kashiwada, T. Matsuda, K. Yoh, J. Cryst. Growth 301-302, 785 (2007)
  • 9. Z. Bak, Phys. Rev. B 68, 064511 (2003)
  • 10. Z. Bak, R. Jaroszewicz, W. Gruhn, Acta Phys. Pol. A 115, 342 (2009)
  • 11. F. Qu, P. Vasilopoulos, Phys. Rev. B 74, 245306 (2006)
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv121n5-6p70kz
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.