Researchers at the Department of Energy’s Oak Ridge National Laboratory joined forces with EPB of Chattanooga and the University of Tennessee at Chattanooga to demonstrate the first transmission of an entangled quantum signal using multiple wavelength channels and automatic polarization stabilization over a commercial network with no downtime.

Researchers from Jena, Würzburg and Potsdam have successfully developed a design for the smallest system of its kind so far to take highly secure quantum communication to space: Led by Fraunhofer IOF, the project CubEniK developed an ultracompact payload for a satellite the size of a shoe box, a so called “CubeSat”. The goal of the mini satellite is to transmit a secure quantum key over a distance of 300 kilometers between two ground stations in Jena and Munich.

In this paper published in Phys. Rev. Applied 20, 044033, Zhaohui Ma et al. from the Stevens Institute of Technology in NJ USA present the characterisation a highly efficient and integrated source of photon pairs using IDQ’s unique Photon-Number-Resolving detectors. The direct access to photon number statistics allowed the team to verify the single-mode (thermal) nature of their source using a single PNR detector, a feature that is fundamental to later realise entanglement swapping using such sources.

Quantum information scientists at the Department of Energy’s Oak Ridge National Laboratory successfully demonstrated a device that combines key quantum photonic capabilities on a single chip for the first time.

Scientists from the ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS) nodes at the Australian National University (ANU) and University of Melbourne (UoM) have pioneered a new quantum imaging protocol using spatially entangled photon pairs generated by an ultra-thin nonlinear metasurface. This revolutionary approach combines ghost imaging and all-optical scanning methods to reconstruct images with exceptional resolution, demonstrating a significant leap forward in the field of quantum optics and imaging technology.

In the new network project “Quantenrepeater.Net (QR.N)”, physicists at the University of Stuttgart are researching, developing, and testing special repeaters for the quantum Internet. These repeaters are key to the secure IT infrastructure and communications of the future.

Over $4 million in Federal investment will allow researchers from the UBC Stewart Blusson Quantum Matter Institute to form collaborations in quantum materials and computing, advancing innovative technologies such as quantum light sources for applications in computing, sensing, and communications.

Currently, the most efficient way to create photon pairs requires sending lightwaves through a crystal large enough to see without a microscope. In a paper published today in Nature Photonics, a team led by Columbia Engineering researchers and collaborators, describe a new method for creating these photon pairs that achieves higher performance on a much smaller device using less energy. P. James Schuck, associate professor of mechanical engineering at Columbia Engineering, helped lead the research team.

Zooming in to the “pixels of reality”: the electron microscope helps us to do that. However, it is unsuited for particularly sensitive targets. A Vienna-based research group intends to avoid this problem with a quantum optics trick and thereby set new standards in high-resolution microscopy.

A photon detector module designed, assembled and programmed at University of Waterloo’s Institute for Quantum Computing (IQC) launched into space earlier this week aboard a SpaceX flight and will soon arrive at the International Space Station. It will be used for quantum entanglement science experiments as part of the Space Entanglement and Annealing Quantum Experiment (SEAQUE) implemented by an international consortium under leadership from the University of Illinois Urbana-Champaign.