In unregelmäßigen Abständen finden am MPQ Seminare statt. Diese werden von den Wissenschaftlern der einzelnen Abteilungen organisiert.
Der Veranstaltungsort wird mit dem jeweiligen Seminar bekannt gegeben.
Raum: Hörsaal, Raum B 0.32 / New lecture hall, Room B 0.32
In this talk, we describe some of the unusual optical properties of materials, known as epsilon-near-zero (ENZ) materials, for which the dielectric permittivity is very small. We describe some of the unusual geometrical optical properties of such materials and present theoretical predictions of how fundamental radiative properties are modified under such conditions. We also describe some of the nonlinear optical properties of these materials. Recent work has shown that optical materials can display an extremely large optical nonlinear response in their ENZ spectral region.
Linking remote quantum systems promises a host of new applications, ranging from distributed quantum computing to entanglement enhanced telescopes. Long distance quantum networks will require many nodes consisting of interfaces between local quantum memories and optical photons. While there are many contenders for these quantum nodes, nanophotonic implementations are particularly attractive: Once a single system works, it can be reproduced many times at minimal marginal costs.
In quanum information theory, the von Neumann entropy usually arises in i.i.d settings, while single-shot settings are commonly characterized by (smoothed) Renyi entropies. I discuss new results that give single-shot interpretations to the von Neumann entropy under appropriate conditions.
In this talk, the exotic story of light matter interaction at the evel of one and even no atom is discussed. A single atom in free space can have significant effects on a single light beam producing e.g. sizeable phase shifts. Regarding the dynamics, a future goal is demonstrating time reversibility of spontaneous emission. But also without any atom, when studying empty space, there are intriguing concepts and future opportunities.