Manipulative Properties of Asymmetric Double Quantum Dots via Laser and Gate Voltage
ZHAO Shun-Cai, LIU Zheng-Dong
School of Materials Science and Engineering, Nanchang University, Nanchang 330031Engineering Research Center for Nanotechnology, Nanchang University,Nanchang 330047Institute of Modern Physics, Nanchang University, Nanchang 330031
Manipulative Properties of Asymmetric Double Quantum Dots via Laser and Gate Voltage
ZHAO Shun-Cai, LIU Zheng-Dong
School of Materials Science and Engineering, Nanchang University, Nanchang 330031Engineering Research Center for Nanotechnology, Nanchang University,Nanchang 330047Institute of Modern Physics, Nanchang University, Nanchang 330031
摘要We present a density matrix approach for the theoretical description of an asymmetric double quantum dot (QD) system. The results show that the properties of gain, absorption and dispersion of the double QD system, the population of the state with one hole in one dot and an electron in another dot transferred by tunneling can be manipulated by a laser pulse or gate voltage. Our scheme may demonstrate the possibility of electro-optical manipulation of quantum systems.
Abstract：We present a density matrix approach for the theoretical description of an asymmetric double quantum dot (QD) system. The results show that the properties of gain, absorption and dispersion of the double QD system, the population of the state with one hole in one dot and an electron in another dot transferred by tunneling can be manipulated by a laser pulse or gate voltage. Our scheme may demonstrate the possibility of electro-optical manipulation of quantum systems.
[1] Empedocles S A, DNorris J and Bawendi M G 1996 Phys.Rev. Lett. 77 3873 [2]Hu Y Z, Koch S W, Lindberg M, Peyghambaruan N, Pollock Rand Abraham F F 1990 Phys. Rev. Lett. 64 1805 [3]Ohno Y, Asaoka K, Kishimoto S, Maezawa K and Mizutani T2000 J. Appl. Phys. 87 4333 [4]Shchekin O B, Park G, Huffaker D L and Deppe D G 2000 Appl. Phys. Lett. 77 466 [5]Saito H, Nishi K and Sugou S 2001 Appl. Phys. Lett. 78 267 [6]Loss D and DiVincenzo D P 1998 Phys. Rev. A 57120 [7]Sherwin M S, Imamo\v{g lu A and Montroy T 1999 Phys.Rev. A 60 3508 [8]Awschalom D D, Burkard G, DiVincenzo D P, Loss D, Sherwin Mand Small A 1999 Phys. Rev. Lett. 83 4204 [9]Stievater T H, Li X, Steel D G, Gammon D, Katzer D S, ParkD, Piermarocchi C and Sham L J 2001 Appl. Phys. Lett. 87133603 [10]Nielsen M A and Chuang I L 2000 Quantum Computationand Quantum Information (Cambridge: Cambridge University Press) [11]DENG H L and Fang X M 2007 Chin. Phys. Lett. 24 3051 [12]Ekert A and Jozsa R 1996 Rev. Mod. Phys. 68733 [13]WANG Z B, ZHANG J Y et al 2008 Chin. Phys. Lett. 25 4435 [14]Kamada H, Gotoh H, Temmyo J, Takagahara T and Ando H 2001 Phys. Rev. Lett. 87 246401 [15]Htoon H, Takagahara T, Kulik D, Baklenov O, Holmes A L etal 2002 Phys. Rev. Lett. 88 087401 [16]Zrenner A, Beham E, Stufler S, Findeis F, Bichler M andAbstreiter G 2002 Nature 418 612 [17]Li X, Wu Y, Steel D G, Gammon D and Stievater T H et al2003 Science 308 809 [18]Kim J, Benson O, Kan H and Yamamoto Y 1999 Nature 397 500 [19]Michler P, Kiraz A, Becher C et al 2000 Science 290 2282 [20]Cole B E, Williams J B, King B T, Sherwin M S and StanleyC R 2001 Nature 410 60 [21]Borri P, Langbein W, Schneider S, Woggon U, Sellin R L,Ouyang D and Bimberg D 2002 Phys. Rev. B 66 081306 [22]Pelton M, Santori C, Vu\v{ckovi\'v J, Zhang B, Solomon GS, Plant J and Yamamoto Y 2002 Phys. Rev. Lett. 89233602 [23]LI Q, ZHONG X W and HU X M 2008 Chin. Phys. Lett. 25 3234 [24]Petroff P M, Lorke A and Imamo\v{g lu A 2001 Phys.Today 54(5) 46 [25]Villas-B\^{os J M, Govorov A O et al 2004 Phys.Rev. B 69 125342 [26]Beirne G J, Hermannst\"{adter C, Wang L, Rastelli A,Schmidt O G and Michler P 2006 Phys. Rev. Lett. 96137401 [27]Stievater T H, Li X, Steel D G, Gammon D, Katzer D S, ParkD, Piermarocchi C and Sham L J 2001 Phys. Rev. Lett. 87133603 [28]Ioannou M, Boviatsis J and Paspalakis E 2008 { \it Phys.E 40 2010 [29]Chang-Hasnain C J, Ku P C, Kim J and Chuang S L 2003 Proc. IEEE 91 1884 [30]Kim J, Chuang S L, Ku P C and Chang-Hasnain C J 2004 J. Phys. Condens. Matter 16 S3727 [31]Kaer Nielsen P, Thyrrestrup H, Mork J and Tromborg B 2007 Opt. Express 15 6396
2009, Vol. 26 
