Institute for Theoretical Physics, University of Bremen, 28334 Bremen, Germany.
Experimentelle Physik II, Technische Universität Dortmund, 44221 Dortmund, Germany.
Nat Commun. 2016 May 10;7:11540. doi: 10.1038/ncomms11540.
Light is often characterized only by its classical properties, like intensity or coherence. When looking at its quantum properties, described by photon correlations, new information about the state of the matter generating the radiation can be revealed. In particular the difference between independent and entangled emitters, which is at the heart of quantum mechanics, can be made visible in the photon statistics of the emitted light. The well-studied phenomenon of superradiance occurs when quantum-mechanical correlations between the emitters are present. Notwithstanding, superradiance was previously demonstrated only in terms of classical light properties. Here, we provide the missing link between quantum correlations of the active material and photon correlations in the emitted radiation. We use the superradiance of quantum dots in a cavity-quantum electrodynamics laser to show a direct connection between superradiant pulse emission and distinctive changes in the photon correlation function. This directly demonstrates the importance of quantum-mechanical correlations and their transfer between carriers and photons in novel optoelectronic devices.
光是通常仅由其经典特性来描述的，例如强度或相干性。当观察其由光子相关性描述的量子特性时，可以揭示有关产生辐射的物质状态的新信息。特别是可以在发射光的光子统计中看到独立和纠缠发射器之间的差异，这是量子力学的核心。当发射器之间存在量子力学相关性时，就会发生研究充分的超辐射现象。尽管如此，以前仅在经典光特性方面证明了超辐射。在这里，我们在有源材料的量子相关性和发射辐射中的光子相关性之间提供了缺失的联系。我们使用腔量子电动力学激光器中的量子点的超辐射来显示超辐射脉冲发射与光子相关函数的显着变化之间的直接联系。这直接证明了量子力学相关性及其在新型光电设备中的载体和光子之间的转移的重要性。
