Skip to main content
Top
Published in: Quantum Information Processing 8/2014

01-08-2014

Estimations of phonon-induced decoherence in silicon–germanium triple quantum dots

Authors: Alexander Yu. Vasiliev, Leonid Fedichkin

Published in: Quantum Information Processing | Issue 8/2014

Log in

Activate our intelligent search to find suitable subject content or patents.

search-config
loading …

Abstract

The decoherence and dephasing rate of charge qubits in systems based on double and triple SiGe quantum dots are studied. At the short time limit, electron–phonon interaction causes an incomplete decay of the off-diagonal density matrix elements. Long-time relaxation decay dominates over dephasing at large times. The triple quantum dot system with the same interdot distance demonstrates lower relaxation rate in the wide range of parameters.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 340 Zeitschriften

aus folgenden Fachgebieten:

  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Versicherung + Risiko




Jetzt Wissensvorsprung sichern!

Literature
1.
go back to reference Shi, Z., Simmons, C., Ward, D., Prance, J., Koh, T.S., Gamble, J.K., Wu, X., Savage, D., Lagally, M., Friesen, M.: ArXiv preprint (2012). arXiv:1208.0519 Shi, Z., Simmons, C., Ward, D., Prance, J., Koh, T.S., Gamble, J.K., Wu, X., Savage, D., Lagally, M., Friesen, M.: ArXiv preprint (2012). arXiv:​1208.​0519
2.
go back to reference Busl, M., Granger, G., Gaudreau, L., Sánchez, R., Kam, A., Pioro-Ladrière, M., Studenikin, S., Zawadzki, P., Wasilewski, Z., Sachrajda, A.: Bipolar spin blockade and coherent state superpositions in a triple quantum dot. Nat. Nanotechnol. 8, 261–265 (2013)CrossRefADS Busl, M., Granger, G., Gaudreau, L., Sánchez, R., Kam, A., Pioro-Ladrière, M., Studenikin, S., Zawadzki, P., Wasilewski, Z., Sachrajda, A.: Bipolar spin blockade and coherent state superpositions in a triple quantum dot. Nat. Nanotechnol. 8, 261–265 (2013)CrossRefADS
3.
go back to reference Mehl, S., DiVincenzo, D.P.: Noise analysis of qubits implemented in triple quantum dot systems in a Davies master equation approach. Phys. Rev. B 87, 195309 (2013)CrossRefADS Mehl, S., DiVincenzo, D.P.: Noise analysis of qubits implemented in triple quantum dot systems in a Davies master equation approach. Phys. Rev. B 87, 195309 (2013)CrossRefADS
4.
go back to reference Thalakulam, M., Simmons, C., Rosemeyer, B., Savage, D., Lagally, M., Friesen, M., Coppersmith, S., Eriksson, M.: Fast tunnel rates in Si/SiGe one-electron single and double quantum dots. Appl. Phys. Lett. 96, 183104–183104 (2010)CrossRefADS Thalakulam, M., Simmons, C., Rosemeyer, B., Savage, D., Lagally, M., Friesen, M., Coppersmith, S., Eriksson, M.: Fast tunnel rates in Si/SiGe one-electron single and double quantum dots. Appl. Phys. Lett. 96, 183104–183104 (2010)CrossRefADS
5.
go back to reference Fischetti, M., Laux, S.: Band structure, deformation potentials, and carrier mobility in strained Si, Ge, and SiGe alloys. J. Appl. Phys. 80, 2234–2252 (1996)CrossRefADS Fischetti, M., Laux, S.: Band structure, deformation potentials, and carrier mobility in strained Si, Ge, and SiGe alloys. J. Appl. Phys. 80, 2234–2252 (1996)CrossRefADS
6.
go back to reference Friesen, M., Chutia, S., Tahan, C., Coppersmith, S.: Valley splitting theory of Si Ge/ Si/ Si Ge quantum wells. Phys. Rev. B 75, 115318 (2007)CrossRefADS Friesen, M., Chutia, S., Tahan, C., Coppersmith, S.: Valley splitting theory of Si Ge/ Si/ Si Ge quantum wells. Phys. Rev. B 75, 115318 (2007)CrossRefADS
7.
go back to reference Palma, G.M., Suominen, K.A., Ekert, A.K.: Quantum computers and dissipation. Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 452, 567–584 (1996)MathSciNetCrossRefADSMATH Palma, G.M., Suominen, K.A., Ekert, A.K.: Quantum computers and dissipation. Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 452, 567–584 (1996)MathSciNetCrossRefADSMATH
8.
go back to reference Fedichkin, L., Fedorov, A.: Study of temperature dependence of electron–phonon relaxation and dephasing in semiconductor double-dot nanostructures. IEEE Trans. Nanotechnol. 4, 65–70 (2005)CrossRefADS Fedichkin, L., Fedorov, A.: Study of temperature dependence of electron–phonon relaxation and dephasing in semiconductor double-dot nanostructures. IEEE Trans. Nanotechnol. 4, 65–70 (2005)CrossRefADS
10.
go back to reference Leggett, A.J., Chakravarty, S., Dorsey, A., Fisher, M.P., Garg, A., Zwerger, W.: Dynamics of the dissipative two-state system. Rev. Mod. Phys. 59, 1 (1987)CrossRefADS Leggett, A.J., Chakravarty, S., Dorsey, A., Fisher, M.P., Garg, A., Zwerger, W.: Dynamics of the dissipative two-state system. Rev. Mod. Phys. 59, 1 (1987)CrossRefADS
11.
go back to reference Fedichkin, L., Fedorov, A., Privman, V.: Measures of Decoherence. In: Proc. SPIE 5105, Quantum Information and Computation, pp. 243–254 (2003) Fedichkin, L., Fedorov, A., Privman, V.: Measures of Decoherence. In: Proc. SPIE 5105, Quantum Information and Computation, pp. 243–254 (2003)
12.
Metadata
Title
Estimations of phonon-induced decoherence in silicon–germanium triple quantum dots
Authors
Alexander Yu. Vasiliev
Leonid Fedichkin
Publication date
01-08-2014
Publisher
Springer US
Published in
Quantum Information Processing / Issue 8/2014
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-014-0780-4

Other articles of this Issue 8/2014

Quantum Information Processing 8/2014 Go to the issue