铷原子偶极阻塞特性的数值模拟

J4 ›› 2017, Vol. 34 ›› Issue (3): 357-362.

铷原子偶极阻塞特性的数值模拟

杨波，刘子龙，徐志兵，张波

武汉理工大学理学院物理系，湖北武汉 430070

收稿日期:2016-03-09 修回日期:2016-03-25 出版日期:2017-05-28 发布日期:2017-05-22
通讯作者: 张波(1977-),女,湖北人,博士,教授,从事量子光学研究。E-mail: zhangbo2011@whut.edu.cn
作者简介:杨波(1989-),湖北人,研究生,从事量子光学研究。E-mail: 15972926640@163.com
基金资助:
Supported by Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China(教育部留学回国人员科研启动费,20141j0006), Self-Determined and Innovative Research Funds of Wuhan University of Technology(武汉理工大学自主创新研究基金,2015zy121, 2016Ia008)

Numerical simulation of rubidium atom dipole blockade properties

Department of Physics, School of Science, Wuhan University of Technology, Wuhan 430070, China

Received:2016-03-09 Revised:2016-03-25 Published:2017-05-28 Online:2017-05-22

摘要/Abstract

摘要： 利用动力学蒙特卡罗方法计算里德堡态铷原子的偶极阻塞效应，分析了主量子数和激光功率对偶极阻塞效应的影响。随着主量子数、激光功率增加，偶极阻塞效应随之增强。激光功率足够高时，被激发到里德堡态的原子将趋于饱和。结果表明：通过选择铷原子里德堡态能级和调节激光功率可以操控里德堡原子的偶极阻塞效应，这在制作量子比特及量子信息处理等方面有重要的应用。

关键词: 量子光学；偶极阻塞；蒙特卡罗法；里德堡态

Abstract: The influences of principle quantum number and laser power on dipole blockade effect are analyzed by calculating dipole blockade effect of Rydberg state rubidium atoms with kinetic Monte Carlo method. The dipole blockade effect is enhanced with increasing of the principle quantum number and laser power. When the laser power is high enough, atoms excited to Rydberg state tend to be saturated. Results show that the dipole blockade effect of Rydberg atoms can be controlled by selecting Rydberg states of rubidium atomic energy level and adjusting laser power. It has important applications in producing quantum bits and quantum information processing.

Key words: quantum optics; dipole blockade; Monte Carlo method; Rydberg state

中图分类号:

O562.4

杨波，刘子龙，徐志兵，张波 . 铷原子偶极阻塞特性的数值模拟[J]. J4, 2017, 34(3): 357-362.

参考文献

[1]Chen Shi, Lv Hongjun, Xie Guangjun.Design and simulation of quantum circuits of B92 QKD protocol[J].（量子电子学报）, 2016, 33(01):51-55(in Chinese).
[2]Chen Yuehua, Wu Xi, Li Gang, et al.Preparation of three-dimentional multi-particle entangled state via the dipole blockade mechanism[J].（量子光子学报）, 2012, 18(2):147-151(in Chinese).
[3]Hu Yuan, Ye Zhiqing.Two-way quantum teleportation via GHZ quadriparticle entangled state[J].（量子电子学报）, 2014, 31(3):285-290(in Chinese).
[4] Tian Xuedong, Liu Yimou, Cui Cuili, et al.Population transfer and quantum entanglement implemented in cold atoms involving two Rydberg states via an adiabatic passage [J]. Phys. Rev. A, 2015, 92: 063411.
[5] Saffman M, Walker T G, M?lmer K.Quantum information with Rydberg atoms [J]. Rev. Mod. Phys., 2010, 82: 2313.
[6] Müller M, Lesanovsky I, Weimer H, et al.Rydberg Gate Based on Electromagnetically Induced Transparency [J]. Phys. Rev. Lett., 2009, 102: 170502.
[7] Saffman M, M?lmer K.Efficient Multiparticle Entanglement via Asymmetric Rydberg Blockade [J]. Phys. Rev. Lett., 2009, 102: 240502.
[8]Wang Haifeng, Zhao Yingjie.Entanglement evolution and transfer in Landau-Zener model[J].（量子电子学报）, 2015, 32(6):691-698(in Chinese).
[9] Weimer H, L?w R, Pfau T, Büchler H P Quantum Critical Behavior in Strongly Interacting Rydberg Gases [J].Phys. Rev. Lett. 2008, 101: 250601.
[10] Ates C, Pohl T, Pattard T, et al.Many-body theory of excitation dynamics in an ultracold Rydberg gas [J]. Phys. Rev. A, 2007, 76: 013413.
[11] Barredo D, Ravets S, Labuhn H, et al.Demonstration of a Strong Rydberg Blockade in Three-Atom Systems with Anisotropic Interactions [J]. Phys. Rev. Lett., 2014, 112: 183002.
[12] Dudin Y O, Li L, Bariani F, et al.Observation of coherent many-body Rabi oscillations [J]. Nature Phys., 2012, 8: 790.
[13]Han Xiaoxuan, Zhao Jianming, Li Changyong, et al.Potentials of long range cesium Rydberg molecule[J].Acta Phys. Sin., 2015, 64(13):133202-
[14] Urban E, Johnson T A, Henage T, et al.Observation of Rydberg blockade between two atoms [J]. Nature Phys., 2009, 5: 110.
[15] Jing Qian, Xing Dongzhao, Lu Zhou, et al.Anisotropic deformation of the Rydberg-blockade sphere in few-atom systems [J]. Phys. Rev. A, 2013, 88: 033422.
[16] Chotia A, Viteau M, Vogt T, et al.Kinetic Monte Carlo modeling of dipole blockade in Rydberg excitation experiment [J]. New J. Phys., 2008, 10: 045031.
[17] Vogt T, Viteau M, Zhao J M, et al.Dipole Blockade at F?rster Resonances in High Resolution Laser Excitation of Rydberg States of Cesium Atoms [J]. Phys. Rev. Lett., 2006, 97: 083003.
[18] Béguin L, Vernier A, Chicireanu R, et al.Direct Measurement of the Van der Waals Interaction between Two Rydberg Atoms [J]. Phys. Rev. Lett., 2013, 110: 263201.
[19] Zimmerman M L, Littman M G, Kash M M, et al.Stark structure of the Rydberg states of alkali-metal atoms [J]. Phys. Rev. A 1979, 20: 2251.
[20] Li W H, Mourachko I, Noel M W, et al.Millimeter-wave spectroscopy of cold Rb Rydberg atoms in a magneto-optical trap: Quantum defects of the ns, np, and nd series [J]. Phys. Rev. A 2003, 67: 052502.
[21] Han J N, Jamil Y, Norum D V L, et al.Rb nf quantum defects from millimeter-wave spectroscopy of cold 85Rb Rydberg atoms [J]. Phys. Rev. A, 2006, 74: 054502.
[22] Tong D, Farooqi S M, Stanojevic J, et al.Local Blockade of Rydberg Excitation in an Ultracold Gas [J]. Phys. Rev. Lett., 2004, 93: 063001.
[23] Singer K, Reetz-Lamour M, Amthor T, et al.Suppression of Excitation and Spectral Broadening Induced by Interactions in a Cold Gas of Rydberg Atoms [J]. Phys. Rev. Lett., 2004, 93: 163001.
[24] Beterov I I, Ryabtsev I I, Tretyakov D B, et al.Quasiclassical calculations of blackbody-radiation-induced depopulation rates and effective lifetimes of Rydberg nS, nP, and nD alkali-metal atoms with n≥80 [J]. Phys. Rev. A, 2009, 79: 052504.
[25]Cong Honglu, Ren Xuezao, Liao Xu.Quantum properties of two phonton Jaynes-Cummings model without rotating wave approximation[J].（光学学报）, 2015, 35(7):0727002(in Chinese).
[26] Petrosyan D, H?ning M, Fleischhauer M.Spatial correlations of Rydberg excitations in optically driven atomic ensembles [J]. Phys. Rev. A, 2013, 87: 053414.