Quantum thermodynamics of interacting systems

相互作用系统的量子热力学

• 批准号: 21J10521
• 负责人: Keller Tim
• 金额: $ 0.58万
• 依托单位: Okinawa Institute of Science and Technology Graduate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-28 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21J10521/
• 关键词: Ultracold gases; Strongly correlated; One-dimensional mixture; Quantum phase transition; Bose-Einstein condensate; Critical metrology

The work on the self-pinning transition for a two component quasi-one-dimensional quantum gas was extended to the case of finite intra-species repulsion for the component immersed into the Bose-Einstein condensate (BEC), going beyond the previously studied Tonks-Girardeau limit of infinite intra-species interaction. If the finite repulsion is weak compared to the inter-species interaction with the BEC, the immersed component can persist in a coherent superfluid state. Extensive simulations of the numerically amenable case of two and three immersed atoms were used to calculate the phase diagram of the system. The superfluid and self-pinned phases are connected via a first-order phase transition that is also captured by the effective analytical model developed previously. The model predicts the transition to coincide with the two-component miscibility criterion in the limit of large particle numbers in the immersed component.The results are described in a preprint on arXiv in collaboration with Dr. Thomas Fogarty and Prof. Thomas Busch that has been accepted for publication in SciPost Physics.During FY 2022 I also presented posters at the domestic conference "Ultracold Atoms Japan" in Okinawa in April 2022 as well as at the international conference "FINESS" in St. Martin, Germany, in May 2022.

两个组分的准量子量子气体的自定义过渡的工作扩展到了浸入Bose-Einstein冷凝物（BEC）的有限种内排斥的情况下，超出了先前研究的Tonks - 无限种类内相互作用的极限。如果与与BEC的种间相互作用相比，有限排斥力较弱，则浸入的成分可以持续在连贯的超流体状态下。使用两种和三个浸入原子的数值符合情况的大量模拟来计算系统的相图。超流体和自定义相通过一阶相变连接，该阶段也被先前开发的有效分析模型捕获。该模型预测了与浸入式成分中较大粒子数量极限的两组分量混溶性标准相吻合的过渡。结果在与Thomas Fogarty博士和Thomas Busch教授合作的预印象中描述了已有的预印象。在2022财年，我还在2022财年发表了海报，于2022年4月在冲绳的国内会议“ Ultracold Atoms Japan”以及2022年5月在德国圣马丁举行的国际会议“ Finess”。

项目成果

Self-Pinning Transition of a Tonks-Girardeau Gas in a Bose-Einstein Condensate

玻色-爱因斯坦凝聚体中唐克斯-吉拉多气体的自钉扎转变

• DOI: 10.1103/physrevlett.128.053401
• 发表时间: 2022
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Keller Tim;Fogarty Thomas;Busch Thomas
• 通讯作者: Busch Thomas

Adiabatic critical quantum metrology cannot reach the Heisenberg limit even when shortcuts to adiabaticity are applied

• DOI: 10.22331/q-2021-07-01-489
• 发表时间: 2021-06-25
• 期刊: QUANTUM
• 影响因子: 6.4
• 作者: Gietka, Karol;Metz, Friederike;Li, Jing
• 通讯作者: Li, Jing

Fermionization of a Few-Body Bose System Immersed into a Bose-Einstein Condensate

浸入玻色-爱因斯坦凝聚态的少体玻色系统的费米化

• 发表时间: 2023
• 期刊: SciPost Physics
• 影响因子: 5.5
• 作者: Tim Keller;Thomas Fogarty;Thomas Busch
• 通讯作者: Thomas Busch

Experimental considerations for the self-pinning transition

自钉扎转变的实验考虑

• 发表时间: 2021
• 作者: Tim Keller