Researchers of the Navascués group at IQOQI Vienna have developed a mathematical framework to reason about adaptive protocols in quantum information theory. When they applied their theory to study entanglement detection, they found that the methods…

One of the most fundamental features of quantum physics is Bell nonlocality: the fact that the predictions of quantum mechanics cannot be explained by any local (classical) theory. This has remarkable conceptual consequences and far-reaching…

Quantum coherence only persists for isolated particles – but whether a particle is isolated depends on the way we look at it. This leads to an apparent “paradox of the third particle”: coherence seems to disappear simply by changing the description.…

“You run, we teleport”

Physicists at the Austrian Academy of Sciences and the University of Vienna have been successful in their experiments creating the world’s first photonic quantum teleportation into error corrected qubits useful for quantum computers.

A new paper by the Ursin group shows how you can get the most of your entanglement-based quantum key distribution (QKD) implementation: Their simple but very accurate model for continuously pumped QKD allows not only to precisely predict the…

In his recent paper, Wolfgang Wieland, researcher at IQOQI-Vienna, looks at the gravitational phase space in a region. The region is defined operationally as a laboratory bounded by light rays. At the boundary, otherwise unphysical gauge degrees of…

Researches experimentally demonstrated how an entanglement distillation scheme can be rethought to distribute quantum entanglement through noisy environments in a highly efficient manner.

A collaboration between Armin Tavakoli - postdoc at IQOQI Vienna - and researchers the University of Science and Technology of China, has shown that data collected in a single experiment can be used to robustly certify the entanglement of a quantum…

Researchers from IQOQI-Vienna (Austrian Academy of Sciences) in the group of Rupert Ursin found a way to increase the secret key rate over long-distance links, distributed via wavelength-multiplexed entangled photons with unprecedented high rates.…