-
We derive the master equation of a double quantum dot charge qubit by taking into account the dissipative effects of the phonon-bath environment, and study the current noise spectrum of the double quantum dot charge qubit in terms of full counting statistics. It is found that the current is asymmetric about the current peak. The Fano factor displays an asymmetric double-peak structure, the asymmetry is due to the dissipations induced by the phonon bath. With increasing temperature T of the phonon bath, the current resonance broadens, the Fano factor peaks become smaller, and the super-Poissonian behavior vanishes.
[1] ［1］DiVincenzo D P 2005 Science 309 2173
[2] ［2］Loss D, DiVincenzo D P 1998 Phys. Rev. A 57 120
[3] ［3］Weinstein Y S, Hellberg C S 2007 Phys. Rev. Lett. 98 110501
[4] ［4］Wu Z J, Zhu K D, Yuan X Z, Jiang Y W, Zheng H 2005 Phys. Rev. B 71 205323
[5] ［5］Hentschel M, Valente Diego C B, Mucciolo Eduardo R, Baranger Harold U 2007 Phys. Rev. B 76 235309
[6] ［6］Buttiker M 2000 Phys. Rep. 1 336
[7] ［7］Dong Z C, Xing D Y, Dong J M 2001 Acta. Phys. Sin. 50 556 (in Chinese) ［董正超、邢定钰、董锦明 2001 50 556］
[8] ［8］An X T, Li Y X, Liu J J 2007 Acta. Phys. Sin. 56 4105 (in Chinese) ［安兴涛、李玉现、刘建军 2007 56 4105］
[9] ［9］Barthold P, Hohls F, Maire N, Pierz K, Haug R J 2006 Phys. Rev. Lett. 96 246804
[10] ］Kielich G, Schll E, Brandes T, Hohls F, Haug R J 2007 Phys. Rev. Lett. 99 206602
[11] ］Brandes T 2005 Phys. Rep. 408 315
[12] ］Wu Z J, Zhu K D, Yuan X Z, Zheng H 2005 Acta. Phys. Sin. 54 3346 (in Chinese) ［吴卓杰、朱卡的、袁晓忠、郑杭 2005 54 3346］
[13] ］Gurvitz S A, Prager Ya S 1996 Phys. Rev. B 53 15932
[14] ］Makhlin Y, Schn G, Shnirman A 2001 Rev. Mod. Phys. 73 357
[15] ］Li X Q, Luo J Y, Yang Y G, Cui P, Yan Y J 2005 Phys. Rev. B 71 205304
[16] ］Li X Q, Cui P, Yan Y J 2005 Phys. Rev. Lett. 94 066803
[17] ］Dong B, Cui H L, Lei X L 2005 Phys. Rev. Lett. 94 066601
[18] ］Ouyang S H, Lam C H, You J Q 2008 Eur. Phys. J. B 64 67
[19] ］Sánchez R, Platero G, Brandes T 2007 Phys. Rev. Lett. 98 146805
[20] ］Belzig W 2005 Phys. Rev. B 71 161301
[21] ］Chen L Y, Ting C S 1992 Phys. Rev. B 46 4714
-
[1] ［1］DiVincenzo D P 2005 Science 309 2173
[2] ［2］Loss D, DiVincenzo D P 1998 Phys. Rev. A 57 120
[3] ［3］Weinstein Y S, Hellberg C S 2007 Phys. Rev. Lett. 98 110501
[4] ［4］Wu Z J, Zhu K D, Yuan X Z, Jiang Y W, Zheng H 2005 Phys. Rev. B 71 205323
[5] ［5］Hentschel M, Valente Diego C B, Mucciolo Eduardo R, Baranger Harold U 2007 Phys. Rev. B 76 235309
[6] ［6］Buttiker M 2000 Phys. Rep. 1 336
[7] ［7］Dong Z C, Xing D Y, Dong J M 2001 Acta. Phys. Sin. 50 556 (in Chinese) ［董正超、邢定钰、董锦明 2001 50 556］
[8] ［8］An X T, Li Y X, Liu J J 2007 Acta. Phys. Sin. 56 4105 (in Chinese) ［安兴涛、李玉现、刘建军 2007 56 4105］
[9] ［9］Barthold P, Hohls F, Maire N, Pierz K, Haug R J 2006 Phys. Rev. Lett. 96 246804
[10] ］Kielich G, Schll E, Brandes T, Hohls F, Haug R J 2007 Phys. Rev. Lett. 99 206602
[11] ］Brandes T 2005 Phys. Rep. 408 315
[12] ］Wu Z J, Zhu K D, Yuan X Z, Zheng H 2005 Acta. Phys. Sin. 54 3346 (in Chinese) ［吴卓杰、朱卡的、袁晓忠、郑杭 2005 54 3346］
[13] ］Gurvitz S A, Prager Ya S 1996 Phys. Rev. B 53 15932
[14] ］Makhlin Y, Schn G, Shnirman A 2001 Rev. Mod. Phys. 73 357
[15] ］Li X Q, Luo J Y, Yang Y G, Cui P, Yan Y J 2005 Phys. Rev. B 71 205304
[16] ］Li X Q, Cui P, Yan Y J 2005 Phys. Rev. Lett. 94 066803
[17] ］Dong B, Cui H L, Lei X L 2005 Phys. Rev. Lett. 94 066601
[18] ］Ouyang S H, Lam C H, You J Q 2008 Eur. Phys. J. B 64 67
[19] ］Sánchez R, Platero G, Brandes T 2007 Phys. Rev. Lett. 98 146805
[20] ］Belzig W 2005 Phys. Rev. B 71 161301
[21] ］Chen L Y, Ting C S 1992 Phys. Rev. B 46 4714
计量
- 文章访问数: 9323
- PDF下载量: 767
- 被引次数: 0
下载:
