Many-boson quantum states and highly non-equilibrium quantum dynamics of low-dimensional attractive Bose systems

低维吸引玻色系统的多玻色子量子态和高度非平衡量子动力​​学

• 批准号: 235853426
• 负责人: Professor Dr. Lorenz S. Cederbaum
• 金额: --
• 依托单位: Forschungsgruppe Theoretische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/235853426?language=en
• 关键词: Many; boson; quantum; states; highly

A major goal of this project is to understand the quantum dynamics and explore the wealth of physical phenomena of low-dimensional attractive Bose systems, on the manybody level. The Gross-Pitaevskii theory is one of the widely accepted mean-field tools dealing with static and dynamical properties of ultracold low-dimensional attractive Bose gases. It predicts the existence of dynamically-stable coherent one-dimensional (1D) objects - solitons and soliton trains. Recently, we studied the dynamics of 1D attractive Bose gases on the many-body level by utilizing our multiconfigurational time-dependent.Hartree for bosons (MCTDHB) method and found a substantially richer physics that what was previously known. In particular, we have discovered new dynamically-stable fragmented objects - termed catons and fragmentons. These fragmented objects are distinct from and generally are lower in energy than the soliton trains. The proposed project is aimed at:(1) Studying the phenomenology and mechanisms of formation of the new dynamically-stable objects catons and fragmentons.(2) Studying the collisional properties of solitons on the many-body level, searching and checking for the emergence of many-body physics during these collisions.(3) Developing and benchmarking the MCTDHB method in 2D, and exploring - what is expected to be very rich - the many-body dynamics of attractive Bose gases in 2D.

该项目的一个主要目标是在多体水平上理解量子动力学并探索低维吸引玻色系统的丰富物理现象。Gross-Pitaevskii理论是研究超冷低维吸引玻色气体静态和动态性质的广泛接受的平均场工具之一。它预测存在动态稳定的相干一维（1D）对象-孤子和孤子串。最近，我们利用多组态含时Hartree玻色子（MCTDHB）方法在多体水平上研究了一维吸引玻色气体的动力学，发现了比以前所知更丰富的物理现象.特别是，我们发现了新的动态稳定的碎片对象-称为catons和fragmentons。这些碎片物体与孤子串不同，并且通常在能量上低于孤子串。本项目的目标是：（1）研究新的动力学稳定体--重子和碎片子的现象学和形成机制。(2)在多体水平上研究孤子的碰撞性质，寻找和检验碰撞过程中多体物理的出现。(3)在2D中开发和基准测试MCTDHB方法，并探索-预计将非常丰富-在2D中吸引玻色气体的多体动力学。

项目成果

Attractive Bose gas in two dimensions: An analytical study of its fragmentation and collapse

二维有吸引力的玻色气体：对其破碎和塌缩的分析研究

• DOI: 10.1103/physreva.89.043604
• 发表时间: 2014
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Marios C. Tsatsos

Tunneling Dynamics in Open Ultracold Bosonic Systems

开放式超冷玻色子系统中的隧道动力学

• DOI: 10.1007/978-3-319-07085-8
• 作者: Axel U. J.

Controlling the velocities and the number of emitted particles in the tunneling to open space dynamics

控制开放空间动力学隧道中发射粒子的速度和数量

• DOI: 10.1103/physreva.89.053620
• 发表时间: 2014
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Axel U. J. Lode;Shachar Klaiman;Ofir E. Alon;Alexej I. Streltsov;Lorenz S. Cederbaum
• 通讯作者: Lorenz S. Cederbaum

Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

打破二维玻色-爱因斯坦凝聚体的碎片恢复能力

• DOI: 10.1103/physreva.90.043620
• 发表时间: 2014
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Shachar Klaiman;Axel U. J. Lode;Alexej I. Streltsov;Lorenz S. Cederbaum;Ofir E. Alon
• 通讯作者: Ofir E. Alon

Variance as a sensitive probe of correlations

方差作为相关性的敏感样本

• DOI: 10.1103/physreva.91.063613
• 发表时间: 2015
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Shachar Klaiman;Ofir E. Alon
• 通讯作者: Ofir E. Alon