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.

关于二元准一维量子气体自钉扎转变的工作扩展到浸入玻色-爱因斯坦凝聚体（BEC）中的成分的有限种内排斥的情况，超越了先前研究的唐克斯-无限种内相互作用的吉拉多极限。如果与 BEC 的物种间相互作用相比，有限斥力较弱，则浸入的组件可以持续处于相干超流体状态。对两个和三个浸入原子的数值适用情况进行了广泛的模拟，以计算系统的相图。超流体和自钉扎相通过一阶相变连接，之前开发的有效分析模型也捕获了这一阶相变。该模型预测，在浸入组件中大颗粒数量限制下，该转变符合双组分混溶性标准。结果在 arXiv 上与 Thomas Fogarty 博士和 Thomas Busch 教授合作的预印本中进行了描述，该预印本已在 arXiv 上发表。已在 SciPost Chemistry 上接受发表。2022 财年期间，我还在 2022 年 4 月在冲绳举行的国内会议“Ultracold Atoms Japan”以及国际会议上展示了海报“FINESS”于 2022 年 5 月在德国圣马丁举行。

项目成果

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

即使应用绝热捷径，绝热临界量子计量也无法达到海森堡极限

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

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

即使应用绝热捷径，绝热临界量子计量也无法达到海森堡极限

• DOI: 10.22331/q-2021-07-01-489
• 发表时间: 2021-03-24
• 期刊: Quantum
• 影响因子: 6.4
• 作者: K. Gietka;F. Metz;T. Keller;Jing Li
• 通讯作者: Jing Li

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

• 发表时间: 2022
• 作者: Tim Keller

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

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

• 发表时间: 2021
• 作者: Tim Keller