Recent progress in utilizing ultrafast light-matter interaction to control the macroscopic properties of quantum materials is reviewed. Particular emphasis is placed on photoinduced phenomena that do not result from ultrafast heating effects but rather emerge from microscopic processes that are inherently nonthermal in nature. Many of these processes can be described as transient modifications to the free energy landscape resulting from the redistribution of quasiparticle populations, the dynamical modification of coupling strengths, and the resonant driving of the crystal lattice. Other pathways result from the coherent dressing of a material’s quantum states by the light field. A selection of recently discovered effects leveraging these mechanisms, as well as the technological advances that led to their discovery, is discussed. A road map for how the field can harness these nonthermal pathways to create new functionalities is presented.

中文翻译：

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座谈会：量子材料中超快控制的非热途径

综述了利用超快光-物质相互作用控制量子材料宏观特性的最新进展。特别强调光致现象，这些现象不是由超快加热效应引起的，而是由本质上非热的微观过程产生的。许多这些过程可以被描述为由于准粒子群的重新分布、耦合强度的动态改变和晶格的共振驱动而导致的自由能景观的瞬态改变。其他路径由光场对材料量子态的相干修饰产生。讨论了一些最近发现的利用这些机制的效应，以及导致它们被发现的技术进步。