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arXiv 2004.06610cond-mat.quant-gas
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一维简谐势阱中$p$波费米子的变分分析

Variational ansatz for $p$-wave fermions confined in a one-dimensional harmonic trap

Przemysław Kościk, Tomasz Sowiński

摘要:

我们提出了一个非常精确和有效的变分方案,用于计算一维简谐势阱中的$p$ -波吸引相互作用费米子系统的基态。通过这种构造,该方法准确地考虑了相互作用的非解析部分,从而在整个相互作用范围内非常精确地逼近真实的基态波函数。在该方法中,我们确定不同数量的粒子和不同的相互作用的系统的不同属性。通过这种方式,我们探讨了系统及其特性如何从理想的无相互作用的费米气体过渡到无限强吸引系统。此外,我们还证明了该方法也可以用于其他数值方法失效的相互作用的排斥分支。本文所提出的包含零程相互作用的方法具有很强的普适性,可以很容易地推广到其它一维约束。

英文摘要:

We propose a very accurate and efficient variational scheme for the ground state of the system of $p$-wave attractively interacting fermions confined in a one-dimensional harmonic trap. By the construction, the method takes the non-analytical part of interactions exactly into account and thus it approximates the true ground-state wave function in a whole range of interactions very accurately. Within the method, we determine different properties of the system for a different number of particles and different interactions. In this way, we explore how the system and its features transit from the ideal non-interacting Fermi gas to the system of infinitely strong attractions. Additionally, we demonstrate that the ansatz may also be used on a repulsive branch of interactions where other numerical methods break down. The presented method of including zero-range interactions is very universal and may be easily generalized to other one-dimensional confinements.

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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