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arXiv 2408.12698cond-mat.quant-gas
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形状调控的玻色-爱因斯坦凝聚

Shape-controlled Bose-Einstein Condensation

Cem Kurt, Altug Sisman, Alhun Aydin

AI总结:

本文提出在固定尺寸、温度和密度下通过嵌套方形域的旋转角调控形状,实现形状诱导的玻色-爱因斯坦凝聚,并发现特定形状下比热出现额外低温峰,为几何操控量子系统提供新途径。

摘要:

尺寸不变的形状变换是一种几何技术,通过在不改变其尺寸的情况下修改约束域的形状,可以清晰地区分量子尺寸效应和形状效应。形状对受限系统行为的影响与尺寸的影响显著不同,使其成为一个新兴的研究领域。最近实现的平底光学盒阱进一步推动了复杂约束几何中量子气体的研究。在此,我们提出了在固定尺寸、温度和密度下的形状诱导玻色-爱因斯坦凝聚。我们研究了纯量子形状效应对嵌套方形域内受限的无相互作用玻色气体的影响,其中形状参数由内外方形之间的旋转角定义和控制。我们的研究结果表明,在某些形状下,比热表现出额外的低温峰。这项工作为通过几何操控控制量子系统开辟了新途径,并为形状诱导量子效应下玻色气体的热力学性质提供了见解。

英文摘要:

Size-invariant shape transformation is a geometric technique that allows for a clear separation between quantum size and shape effects by modifying the shape of the confinement domain without altering its size. The impact of shape on the behavior of confined systems is significantly different from that of size, making it an emerging area of research. The recent realization of flat-bottomed optical box traps has further contributed to the study of quantum gases in complex confinement geometries. Here, we propose shape-induced Bose-Einstein condensation at a fixed size, temperature, and density. We investigate the impact of pure quantum shape effects on a non-interacting Bose gas confined within nested square domains, where the shape parameter is defined and controlled by the rotation angle between the inner and outer squares. Our findings reveal that specific heat exhibits an additional low-temperature peak at certain shapes. This work opens new avenues for controlling quantum systems through geometric manipulation and provides insights into the thermodynamic properties of Bose gases under shape-induced quantum effects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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