Prof. Dr. Christine Silberhorn and her team (University of Paderborn) recently demonstrated the first device that combines frequency conversion with high efficiency and bandwidth compression of single photons. The device, which is based on non-linear waveguides in Lithium Niobate manufactured in the group in Paderborn, allows to adapt photons from sources in the telecom range to atomic systems in the visible and near-infrared spectrum, paving the…
The characterization of quantum states is an essential part of quantum optics. One particular task is the estimation of squeezing in so called two-mode squeezed states.
In a recent publication in Physical Review Letters*, researchers from the integrated quantum optics group in Paderborn in collaboration with theoretical physicists from Olomouc in the Czech Republic and Madrid in Spain have demonstrated a method to measure such squeezing in a…
The generation of macroscopic quantum states is a challenging goal throughout many fields of physics. Not only would it be fascinating to see quantum effects on a macroscopic scale, their generation is also a prerequisite if one wants to exploit quantum effects for real-world applications.
In a joint publication, recently published in Physical Review Letters*, scientists from two groups at the University of Paderborn, the IQO and the MQO, in…
[Scientific Reports 5, 13495 (2015)]
The aim for understanding transport phenomena is at the heart of many studies on processes in nature and man-made structures ranging from photosynthesis to information network applications. Recent research indicates that the combination of classical with quantum effects can explain or introduce highly unexpected behaviour of the overall system. In order to understand quantum transport processes on a random or…
Rebeccah Grotemeyer defended her bachelor's thesis with the title "Comparison of classically excited modes and modes excited through parametric down-conversion".
Scientists in the group of Christine Silberhorn in Paderborn and the group of Werner Vogel in Rostock have demonstrated a new method to identify nonclassical correlations between two parties sharing a quantum state. The method allows to characterize quantum states and resources in a simple and straight forward way. The results are published in Uncovering Quantum Correlations with Time-Multiplexed Click Detection, Phys. Rev. Lett. 115, 023601…