Semiclassical limit Bose-Einstein condensate dynamics

半经典极限玻色-爱因斯坦凝聚态动力学

基本信息

项目摘要

Ultracold Bose gases have proven to be an ideal experimental test bed for many different aspects of physics. Furthermore the theoretical description of weakly interacting Bose gases in designed time-spatial dependent potentials is very challenging. In this proposal we want to follow both routes in close collaboration between theory and experiment. In the experimental part we will utilize ultracold gases for the exploration of new effective ħ regimes where especially the semiclassical limit seems for the first time accessible. As one of the first examples we will explore the possibilities of the realization of a single particle classical Hamiltonian ratchet, employing the flexible design of temporal and spatial potentials and the strong localization in phase space due to the very low temperature. In contrast to the experiments performed so far the new systems allows the realization of driven periodic potentials with long wavelengths leading to small effective ħ values. The quantum gas system also allows the exploration of the semiclassical limit in a different way, by identifying the meanfield treatment as the classical counterpart to the full quantum mechanical many body description. In this context the effective ħ scales inversely with the particle number which can be changed experimentally over few orders of magnitude offering a unique system. Specifically we will explore driven dynamics of Bose-Einstein condensates in double and many well systems, where meanfield as well as certain many particle aspects are accessible experimentally. Theoretically we will develop different effective descriptions which will be tested against experimental results but also to exact solutions of the corresponding few particle problem.
超冷玻色气体已被证明是物理学许多不同方面的理想实验测试平台。此外,在设计的时空相关势中对弱相互作用玻色气体的理论描述是非常具有挑战性的。在这个建议中,我们希望在理论和实验之间密切合作的情况下遵循这两条路线。在实验部分,我们将利用超冷气体探索新的有效的预测制度,特别是半经典的限制似乎是第一次访问。作为第一个例子之一,我们将探讨实现单粒子经典哈密顿棘轮的可能性,采用灵活的设计的时间和空间的潜力和强大的本地化相空间由于非常低的温度。与迄今为止进行的实验相比,新系统允许实现具有长波长的驱动周期电位,从而导致小的有效预测值。量子气体系统也允许以不同的方式探索半经典极限,通过将平均场处理确定为完整量子力学多体描述的经典对应物。在这种情况下,有效的预测与粒子数成反比,粒子数可以通过实验在几个数量级上改变,从而提供独特的系统。具体来说,我们将探讨驱动动力学的玻色-爱因斯坦凝聚体在双和多阱系统,其中平均场以及某些许多粒子方面的实验是可以访问的。从理论上讲,我们将开发不同的有效的描述,将测试对实验结果,但也相应的几个粒子问题的精确解。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Single spontaneous photon as a coherent beamsplitter for an atomic matter-wave
单自发光子作为原子物质波的相干分束器
  • DOI:
    10.1038/nphys1961
  • 发表时间:
    2011
  • 期刊:
  • 影响因子:
    19.6
  • 作者:
    J. Tomkovic;M. Schreiber;J. Welte;M. Kiffner;J. Schmiedmayer;M.K. Oberthaler
  • 通讯作者:
    M.K. Oberthaler
Bosonic transport through a chain of quantum dots
  • DOI:
    10.1140/epjb/e2013-40417-4
  • 发表时间:
    2013-04
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Ivanov;G. Kordas;A. Komnik;S. Wimberger
  • 通讯作者:
    A. Ivanov;G. Kordas;A. Komnik;S. Wimberger
Dissipation-induced macroscopic entanglement in an open optical lattice
开放光学晶格中耗散引起的宏观纠缠
  • DOI:
    10.1209/0295-5075/100/30007
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    G. Kordas;S. Wimberger;D. Witthaut
  • 通讯作者:
    D. Witthaut
Beyond mean-field dynamics in open Bose-Hubbard chains
  • DOI:
    10.1103/physreva.83.063608
  • 发表时间:
    2011-06-07
  • 期刊:
  • 影响因子:
    2.9
  • 作者:
    Witthaut, D.;Trimborn, F.;Wimberger, S.
  • 通讯作者:
    Wimberger, S.
Optimized absorption imaging of mesoscopic atomic clouds
介观原子云的优化吸收成像
  • DOI:
    10.1007/s00340-013-5553-8
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    W. Muessel;H. Strobel;M. Joos;E. Nicklas;I. Stroescu;J. Tomkovic;D.B. Hume;M.K. Oberthaler
  • 通讯作者:
    M.K. Oberthaler
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Professor Dr. Markus Kurt Oberthaler其他文献

Professor Dr. Markus Kurt Oberthaler的其他文献

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{{ truncateString('Professor Dr. Markus Kurt Oberthaler', 18)}}的其他基金

Test of weak equivalence principle with antimatter
反物质弱等效原理检验
  • 批准号:
    234920277
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Nonlinear matter wave optics: Experiments on nonlinear quantum dynamics in double-well and periodic potentials
非线性物质波光学:双阱和周期势中的非线性量子动力学实验
  • 批准号:
    5454401
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Experimente zur nichtlinearen Materie-Wellenoptik
非线性物质波光学实验
  • 批准号:
    5283110
  • 财政年份:
    2000
  • 资助金额:
    --
  • 项目类别:
    Independent Junior Research Groups

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职业:操作超出激光相干性且低于投影极限的光学原子钟
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