论文标题
用$γ$ -rays核库珀对隧道的量子纠缠
Quantum entanglement in nuclear Cooper pair tunneling with $γ$-rays
论文作者
论文摘要
虽然在重离子碰撞中暂时建立（$τ_{coll} \ ofit10^{ - 21} $ s）在超级流体核之间 - 通过哪个库珀配对隧道（$ q $ -v $ -Value $ q_ {2n} $）在接下来的方面是一定的转移，而在cooper pair $ q_ {$ q $ -value $ -Value $ q_-value $ -Value $ q_ {2n}中，是一个连续的nuclos，是恩格尔德的核心的主要方面 - 超级流，它显示了与仪表空间中自发对称性断裂相关的许多特殊效果（BCS凝结），可以根据单个量子状态和单个库珀对的隧道进行研究。从以低于库仑屏障的能量进行的单中子转移反应的研究结果，我们估计了核库珀对的均方根半径（相关长度）的值。与最接近方法的最大距离相关的数量，绝对两核子隧道横截面的数量是单粒子的阶数。此外，（约瑟夫森）频率$ν_j= q_ = q_ {2n}/h $分布在能量范围$ \ hbar/τ_{coll} $上的$γ$ -rays的排放。
While Josephson-like junctions, transiently established in heavy ion collisions ($τ_{coll}\approx10^{-21}$ s) between superfluid nuclei --through which Cooper pair tunneling ($Q$-value $Q_{2n}$) proceeds mainly in terms of successive transfer of entangled nucleons-- is deprived from the macroscopic aspects of a supercurrent, it displays many of the special effects associated with spontaneous symmetry breaking in gauge space (BCS condensation), which can be studied in terms of individual quantum states and of tunneling of single Cooper pairs. From the results of studies of one- and two- neutron transfer reactions carried out at energies below the Coulomb barrier we estimate the value of the mean square radius (correlation length) of the nuclear Cooper pair. A quantity related to the largest distance of closest approach for which the absolute two-nucleon tunneling cross section is of the order of the single-particle one. Furthermore, emission of $γ$-rays of (Josephson) frequency $ν_J=Q_{2n}/h$ distributed over an energy range $\hbar/τ_{coll}$ is predicted.
