文献类型：期刊文献

英文题名：Fast quantum state transfer in hybrid quantum dot-metal nanoparticle systems by shaping ultrafast laser pulses

作者：Qi, Yihong[1,2];Shu, Chuan-Cun[3];Dong, Daoyi[2];Petersen, Ian R.[4];Jacobs, Kurt[5,6];Gong, Shangqing[1]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia;[3]Cent S Univ, Sch Phys & Elect, Inst Super Micro Struct & Ultrafast Proc Adv Mat, Changsha 410083, Hunan, Peoples R China;[4]Australian Natl Univ, Res Sch Engn, Canberra, ACT 2602, Australia;[5]US Army Res Lab, Computat & Informat Sci Directorate, Adelphi, MD 20783 USA;[6]Univ Massachusetts, Dept Phys, Boston, MA 02125 USA

年份：2019

卷号：52

期号：42

外文期刊名：JOURNAL OF PHYSICS D-APPLIED PHYSICS

收录：;EI(收录号：20193607389411);WOS:【SCI-EXPANDED(收录号:WOS:000478736500001)】；

基金：Y H Q and S Q Gong acknowledges the financial support by National Natural Science Foundation of China under Grant Nos. 11874146, 11774089 and 11474092 as well as the China Scholarship Council (CSC) under the Grant No. 201506745029. D D acknowledges partial support by National Natural Science Foundation of China under Grant No. 61828303 and the Australian Research Council under Grant No. DP190101566. IRP acknowledge partial support by the Australian Research Council under Grant No. DP180101805, and the AFOSR and ONRG under agreement number FA 2386-1-4065. Y H Q also acknowledges the support and hospitality provided by UNSW Canberra during his visit.

语种：英文

外文关键词：quantum control; quantum dot; quantum optimal control; metal nanoparticle systems

摘要：Semiconductor quantum dots (SQDs) have relatively short decoherence times, but have the potential for extremely fast operations implemented by femto-second laser pulses, making them a possible candidate for very high speed quantum information processing. These operations are enhanced by positioning a metal nano-particle (MNP) near to the SQD which significantly increases the strength of electric fields applied to it. Here we consider an SQD with three-levels in a Lambda configuration, and explore the requirements for implementing a transfer from one ground state to the other via the upper level. A recently developed optimization method allows us to fix the energy of the laser pulse while satisfying the requirement that the pulse has no DC component. We show that the use of carefully shaped pulses significantly reduces the required laser power. We also determine the dependence of the pulse power on the distance between the SQD and the MNP, and explore the degree to which the process follows the pulse area theorem for first-order perturbative processes.