AI 中文总结
该研究针对Dicke超辐射建立含局域退相与自发发射的标度理论，揭示三种标度区域及对应连续相变，阐明局域退相干会抑制大N下的$N^2$标度。
AI 中文摘要
多体相干的存续依赖于关联建立与退相干之间的竞争。在Dicke超辐射中，集体发射会建立关联，使N个发射体的峰值强度标度为$N^2$。我们发展了包含局域退相和自发发射的标度理论，得到完全集体、部分集体及独立发射体三种标度区域。完全集体区域的边界定义了瞬态可观测量中的连续相变，局域退相干可在N增大时阻止$N^2$标度的出现。
英文摘要
The survival of many-body coherence depends on the competition between correlation buildup and decoherence. In Dicke superradiance, collective emission builds up correlations, producing a peak intensity scaling as $N^2$ for $N$ emitters. We develop a scaling theory including local dephasing and spontaneous emission and obtain fully collective, partially collective, and independent-emitter scaling regimes. The boundary of the fully collective regime defines a continuous phase transition in a transient observable. Local decoherence can prevent $N^2$ scaling despite increasing $N$.
Comments5+11 pages, 3+4 figures
