Universal physics of bound states of a few charged particles
Universal physics of bound states of a few charged particles
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一些带电粒子的束缚态的普遍物理
DOI：
10.1016/j.physletb.2019.135016
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发表时间：
2019
影响因子：
4.4
通讯作者：
A. Volosniev
中科院分区：
文献类型：
--
作者：
C. Schmickler;H. Hammer;A. Volosniev;A. Volosniev
我们研究了受吸引的零程/短程加上排斥库仑粒间力的带电粒子的少体束缚态。系统零能时的特征长度标度由库仑长度标度D和库仑修正的有效射程r_f确定。我们研究了带有D≫r的带电粒子的浅束缚态，结果表明这些系统服从不同于中性粒子的普适标度定律。对这些态的精确描述需要库仑修正的散射长度和有效范围，除非库仑相互作用非常弱(D→∞)。我们的发现适用于其空间范围明显大于吸引势范围的束缚态。这些态具有普遍性--它们的性质与短程势的形状无关。
We study few-body bound states of charged particles subject to attractive zero-range/short-range plus repulsive Coulomb interparticle forces. The characteristic length scales of the system at zero energy are set by the Coulomb length scale D and the Coulomb-modified effective range r eff. We study shallow bound states of charged particles with D≫ r eff and show that these systems obey universal scaling laws different from neutral particles. An accurate description of these states requires both the Coulomb-modified scattering length and the effective range unless the Coulomb interaction is very weak (D→∞). Our findings are relevant for bound states whose spatial extent is significantly larger than the range of the attractive potential. These states enjoy universality–their character is independent of the shape of the short-range potential.
影响因子：
56.9
作者：
Kunitski, Maksim;Zeller, Stefan;Doerner, Reinhard
通讯作者：
Doerner, Reinhard
3He有效场论
影响因子：
1.6
作者：
Ando S
通讯作者：
Ando S