Connecting field and intensity correlations: the Siegert relation and how to test it

Field and intensity correlations: the Siegert relation from stars to quantum emitters

The Siegert relation relates field and intensity temporal correlations. After a historical review of the Siegert relation and the Hanbury Brown and Twiss effect, we discuss the validity of this relation in two different domains. We first show that this relation can be used in astrophysics to determine the fundamental parameters of stars, and that it is especially important for the observation with stellar emission lines. Second, we verify the validity of this relation for moving quantum scatterers illuminated by a strong driving field.

Intensity fluctuations signature of 3D Anderson localization of light

Apart from the difficulty of producing highly scattering samples, a major challenge in the observation of Anderson localization of 3D light is identifying an unambiguous signature of the phase transition in experimentally feasible situations. In this letter we establish a clear correspondence between the collapse of the conductance, the increase in intensity fluctuations at the localization transition and the scaling analysis results based on the Thouless number, thus connecting the macroscopic and microscopic approaches of localization. Furthermore, the transition thus inferred is fully compa…

驱动耗散原子云稳态中的非高斯相关性

Non-Gaussian correlations in the steady-state of driven-dissipative clouds of two-level atoms

研究通过测量激光驱动稀疏原子云发射光的二阶相干函数，发现其偏离高斯混沌光的Siegert关系，表明光子统计非高斯，源于原子介质中的非高斯相关性。