Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells

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	Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells
	Luo, XQ ; Wang, DL ; She, YC ; Fan, H ; Liu, WM
刊名	EUROPEAN PHYSICAL JOURNAL D
	2014
卷号	68 期号:4
ISSN号	1434-6060
通讯作者	Luo, XQ (reprint author), Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China.
中文摘要	We investigate theoretically both the linear and nonlinear properties of the probe and signal optical pulsed fields in a system of four-level coupled GaAs/AlGaAs quantum wells with spontaneous decay of the longitudinal optical phonons (SDLOP) between the lower excited state and the ground state levels. In the linear range, we predict the existence of electromagnetically induced absorption (EIA), and that it is possible to mutually convert from electromagnetically induced transparency to EIA by adjusting the coherent control of the control optical field and the SDLOP. In the nonlinear range, it is shown that by taking into account the influence of the SDLOP, the cross-Kerr nonlinearity of the probe and signal optical fields can be tremendously enhanced. Simultaneously, we obtain the presence of the suppression of self-Kerr optical absorption of the probe field. These characteristics are advantageous to enable the realization of efficient photon-photon entanglement, and generate conditional nonlinear phase shifts of order p. Thereafter, we present a feasible scheme to carry out a two-qubit optical controlled-phase gate by encoding the polarization state of the probe and signal optical fields. Utilizing the linear optics components, we can discriminate the maximal polarization-entangled state of such a two-qubit system. This proposal is potentially applicable to facilitate the realization of solid states mediated all-optical quantum computation and information processing.
资助信息	NKBRSFC [2011CB921502, 2012CB821305]; NSFC [1190024, 61227902, 61378017]; SRF of Hunan provincial Education Department [12A140]; Science and Technology Foundation of Guizhou Province of China [J20112219, J20122314]; Hunan Provincial Innovation Foundation for Postgraduate [CX2012B248]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59077]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Luo, XQ,Wang, DL,She, YC,et al. Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells[J]. EUROPEAN PHYSICAL JOURNAL D,2014,68(4).
APA	Luo, XQ,Wang, DL,She, YC,Fan, H,&Liu, WM.(2014).Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells.EUROPEAN PHYSICAL JOURNAL D,68(4).
MLA	Luo, XQ,et al."Adjustable electromagnetically induced transparency and absorption, optical controlled-phase gate in semiconductor quantum wells".EUROPEAN PHYSICAL JOURNAL D 68.4(2014).