Dephasing due to background charge fluctuations

Physical Review B - Condensed Matter and Materials Physics

Volumn 67, Issue 19, 2003, Pages 1953201-1953209

  Itakura, Toshifumi ^a   Tokura, Yasuhiro ^a  

^a NTT Basic Research Laboratories   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; DEGRADATION; ELECTRICITY; ELEMENTARY PARTICLE; MATHEMATICAL ANALYSIS; NOISE; QUANTUM MECHANICS;

EID: 0037826925     PISSN: 01631829     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevB.67.195320     Document Type: Article

References (30)

1. Y. Nakamura, Yu. A. Pashkin, and J. S. Tsai, Nature (London) 398, 786 (1999).
2. D. Loss and D. P. DiVincenzo, Phys. Rev. A 57, 120 (1998).
3. T. Tanamoto, Phys. Rev. A 61, 22 305 (2000).
4. A. Miranowicz, S. K. Özdemir, M. Koashi, N. Imoto, and Y. Hirayama, Phys. Rev. A 65, 062321 (2002).
5. T. H. Oosterkamp, T. Fujisawa, W. G. van der Wiel, K. Ishibashi, R. V. Hijman, S. Tarucha, and L. P. Kouwenhoven, Nature (London) 395, 873 (1998).
6. T. Fujisawa, T. H. Oosterkamp, W. G. van der Wiel, B. W. Broer, R. Aguado, S. Tarucha, and L. P. Kouwenhoven, Science (Washington, DC, U.S.) 282, 932 (1998).
7. A. Shnirman, G. Schön, and Z. Hermon, Phys. Rev. Lett. 79, 2371 (1997).
8. P. L. Lafarge, P. Joyez, H. Pothier, A. Cleland, T. Holst, D. Esteve, C. Urbina, and M. H. Devoret, C. R. Acad. Sci. Paris 314, 883 (1992).
9. G. Zimmerli, T. M. Eiles, R. L. Kautz, and J. M. Martinis, Appl. Phys. Lett. 61, 13 (1992).
10. C. Kurdak, C. J. Chen, D. C. Tsui, S. Parihar, S. Lyon, and G. W. Weimann, Phys. Rev. B 56, 9813 (1997).
11. A. B. Zorin, F.-J. Ahlers, J. Niemeyer, T. Weimann, H. Worf, V. A. Krupenin, and S. V. Lotkhov, Phys. Rev. B 53, 13 682 (1996).
12. T. Fujisawa and Y. Hirayama, Appl. Phys. Lett. 77, 543 (2000).
13. P. Dutta and P. H. Horn, Rev. Mod. Phys. 53, 497 (1981).
14. E. Paladino, L. Faoro, G. Falci, and R. Fazio, Phys. Rev. Lett. 88, 228304 (2002).
15. A. Shnirman, Y. Makhlin, and G. Schön, Phys. Scr. T 102, 147 (2002).
16. Y. Nakamura, Yu. A. Pashkin, T. Yamamoto, and J. S. Tsai, Phys. Rev. Lett. 88, 047901 (2002).
17. In the present study, dissipation means the relaxation of the population of bonding-antibonding states. On large time scales, the qubit state becomes mixed with equal populations of bonding and antibonding states; this relaxation is not an energy relaxation.
18. Y. M. Galperin and K. A. Chao, Phys. Rev. B 52, 12 126 (1995).
19. R. Bauernschmitt and Yuli V. Nazarov, Phys. Rev. B 47, 9997 (1992).
20. Y. Imry, Introduction to Mesoscopic Physics (Oxford University Press, Oxford, 1997).
21. A. I. Burshtein, Sov. Phys. JETP 22, 939 (1965).
22. A. I. Burshtein, Sov. Phys. JETP 21, 567 (1965).
23. A. J. Leggett, S. Chakravarty, A. T. Dorsey, M. P. A. Fisher, A. Garg, and W. Zwerger, Rev. Mod. Phys. 59, 1 (1987).
24. C. L. Slichter, Principles of Magnetic Resonance, 3th ed. (Springer-Verlag, Berlin, 1997).
25. T. Fujisawa, W. G. van der Wiel, and L. P. Kouwenhoven, Physica E (Amsterdam) 7, 413 (2000).
26. G. Burkard, D. Loss, and D. P. DiVincenzo, Phys. Rev. B 59, 2070 (1999).
27. In the present study, we assume the interaction between the coupled-dot system and charge state to be dipole-monopole coupling. When the electron reservoir screens the charge state effectively, the charge state and reservoir act on the system as a dipole. The interaction type is dipole-dipole, and the interaction strength decreases more rapidly as the distance between the charge state and system increases. A longer dephasing time is thus expected compared with that of a dipole-monopole interaction.
28. J. Preskill, Proc. R. Soc. London, Ser. A 454, 385 (1998).
29. T. Itakura and Y. Tokura (unpublished).
30. D. Vion, A. Aassime, A. Cottet, P. Joyez, H. Pothier, C. Urbina, D. Esteve, and M. H. Devoret, Science (Washington, DC, U.S.) 296, 886 (2002).