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arXiv 2103.07874cond-mat.stat-mechcond-mat.other
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超流氦的核与电子相干性

Nuclear and electronic coherence in superfluid helium

Yu. M. Poluektov

摘要:

本文提出了一个4He原子多粒子系统的半唯象模型,其中氦原子被认为是由一个原子核和一对处于单重态的束缚电子组成的复合体.在零温度下,有两个带相反电荷的粒子的玻色-爱因斯坦凝聚体,即带正电的核的凝聚体和带负电的电子对的凝聚体。结果表明,在这样的系统中存在两个激发分支:声音和光。在此基础上,对超流氦电活动的实验研究提出了一种解释。观察到微波辐射的共振吸收的频率被解释为光学分支中的间隙。结果表明,谐振腔中驻波的电势分布与实验观察到的情况相似。

英文摘要:

A semi-phenomenological model of a many-particle system of 4He atoms is proposed, in which a helium atom is considered as a complex consisting of a nucleus and a bound pair of electrons in the singlet state. At zero temperature, there are two Bose-Einstein condensates of particles with opposite charges, namely, a condensate of positively charged nuclei and a condensate of negatively charged electron pairs. It is shown that in such a system there exist two excitation branches: sound and optical. On the basis of this model an interpretation of experiments on the study of the eltctrical activity of superfluid heliun is proposed. The frequency at which the resonant absorption of a microwave radiation is observed is interpreted as a gap in the optical branch. It is shown that the distribution of the electric potential in a standing wave in a resonator is similar to that observed experimentally.

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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