量子气体在光晶格中的一维玻色-哈伯德模型模拟  

One Dimensional Bose-Hubbard Model Simulatation of Quantum Gas in Optical Lattice

作　　者：栾添 张雪松[1] 陈徐宗[2] LUAN Tian;ZHANG Xuesong;CHEN Xuzong(China Academy of Electronics and Information Technology,Beijing 100041,China;School of Electronics Engineering and Computer Science,Peking University,Beijing 100871,China)

机构地区：[1]中国电子科学研究院,北京100041 [2]北京大学信息科学技术学院,北京100871

出　　处：《计算机工程》2018年第12期1-5,共5页Computer Engineering

基　　金：中国博士后基金(2017M620859)

摘　　要：针对凝聚态物理学的一维玻色-哈伯德理论模型,应用三维光晶格囚禁超冷量子气体进行量子模拟,通过连续改变光晶格势阱深度和制备量子气体温度,实现在一维玻色-哈伯德模型中超流-莫特绝缘态量子相变过程。通过超冷原子时间飞行(TOF)成像方法,对实验中量子气体在扩散过程中动量空间的干涉图样进行分析,得到在量子相变过程中的超流成分和莫特绝缘态成分的变化数据。实验结果表明,光晶格中量子气体可以较好地模拟一维玻色-哈伯德理论模型。For the one-dimensional Bose-Hubbard theoretical model of condensed matter,the quantum phase transition process of the superfluid-Mott insulation state in the one-dimensional Bose-Hubbard model is realized by continuously changing the depth of the optical lattice well and preparing the temperature of the quantum gas.Through the ultra-cold atomic Time of Flight(TOF)imaging method,the interference pattern of the momentum space of the quantum gas in the diffusion process is analyzed,and the change data of the superfluid component and the Mott insulation state component in the quantum phase transition process are obtained.Experimental results show that the quantum gas in the optical lattice can simulate the one-dimensional Bose-Hubbard theoretical model.

关 键 词：量子模拟 量子计算 量子气体 光晶格 玻色-哈伯德模型 

分 类 号：O455.3[理学—无线电物理]