Neutron scattering and theoretical studies reveal wavelike electron states in CePd3 Quantum entities manifest themselves as either particles or waves. In a physical system containing a very large number of identical particles, such as electrons in a material, individualistic (particle-like) behavior prevails at high temperatures. At low temperatures, collective behavior emerges, and excitations of the system in this regime are best described as waves—long-lived phenomena that are periodic in both space and time and often dubbed “coherent excitations” by physicists. On page 186 of this issue, Goremychkin et al. (1) used experiment and theory to describe the emergence of coherent excitations in a complex quantum system with strong interactions. They studied a cerium-palladium compound, CePd3, in which the very localized electrons of 4f orbitals of Ce interact with the much more itinerant conduction electrons of the extended d orbitals of Pd at low temperatures to create a wavelike state.

中文翻译：

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揭示和计算相干激发

中子散射和理论研究揭示了 CePd3 量子实体中波状电子状态表现为粒子或波。在包含大量相同粒子（例如材料中的电子）的物理系统中，个体（粒子状）行为在高温下盛行。在低温下，集体行为出现，在这种情况下系统的激发最好被描述为波——在空间和时间上都是周期性的长期存在的现象，物理学家经常将其称为“相干激发”。在本期第 186 页，Goremychkin 等人。(1) 用实验和理论来描述在具有强相互作用的复杂量子系统中出现相干激发。他们研究了一种铈钯化合物，CePd3，