In 1993, Rafael Sorkin published a groundbreaking paper titled "Impossible Measurements on Quantum Fields". In this, he was able to show that under quite generic assumptions, a projective measurement in quantum field theory enables superluminal…

The IQOQI Summer School 2024 will give you the opportunity to gain exciting insights into the fields of quantum optics and quantum information and into the fascinating quantum physics research conducted in Innsbruck and Vienna.

The next Vienna Quantum Foundations Conference will celebrate two anniversaries: 60 years of Bell’s Theorem, and 20 years of IQOQI Vienna.

Light is a powerful tool to manipulate atoms, but it also allows to create correlations between them.

In 1966, R. Penrose suggested the so-called spin network model to illustrate how the structure of quantum spacetime could look like, and, using combinatorial methods, he showed how the conformal structure of the Euclidean 3-space can be recovered…

In the presence of symmetry, the observables of a quantum field theory are described relative to a quantum reference frame (QRF).

We propose that quantum entanglement is a special sort of selection artefact, explicable as a combination of (i) collider bias and (ii) a boundary constraint on the collider variable.

Nanoparticles levitated in vacuum are expected to be a promising platform for various applications ranging from ultrasensitive accelerometers to investigations on macroscopic quantum physics and fundamental physics. In many applications, cooling the…

We present a Lie symmetry theoretical formulation of `relativistic' quantum mechanics with a Minkowski metric operator defining the inner product between state vectors, and a noncommutative geometric picture of spacetime naturally comes out of it. …

Higher-order transformations that act on a certain number of input quantum channels in an indefinite causal order — such as the quantum switch — cannot be described by standard quantum circuits that use the same number of calls of the input quantum…