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.

将两组分准一维量子气体的自钉扎跃迁的研究工作推广到了浸入玻色-爱因斯坦凝聚体（BEC）中的组分的有限种内排斥的情况，超越了先前研究的无限种内相互作用的Tonks-Girardeau极限.如果有限排斥是弱的物种间的相互作用与BEC相比，浸没的组件可以持续在一个连贯的超流状态。大量的模拟的数值服从的情况下，两个和三个浸没原子被用来计算系统的相图。超流相和自钉扎相通过一阶相变连接，该一阶相变也被先前开发的有效分析模型捕获。该模型预测的转变符合浸入组件中大颗粒数量限制的双组分可吸收性标准。结果在arXiv上与托马斯福格蒂博士和托马斯布施教授合作的预印本中进行了描述，该预印本已被SciPost Physics接受发表。在2022财年期间，我还在国内会议“Ultracold Atoms Japan”上发表了海报。于2022年4月在冲绳举行的国际研讨会以及2022年5月在德国圣马丁举行的国际研讨会“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

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

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