In their 2013 experimental paper Danan, Farfunki, Bar-Ad, and Vaidman conducted a spectroscopical experiment proposed by Vaidman.

I will show that all bipartite process matrices that obey a recently proposed unitary extension postulate are causally separable, i.e., their unitary extensions are just variations of the quantum SWITCH.

Have you ever wondered what quantum physicists do?

According to the Unruh effect, an observer moving with uniform proper acceleration a, perceives the Minkowski vacuum as a heat bath at the Unruh temperature T=a/2pi.

What if acquiring these results in the first place necessitates what the same theory considers to be an interaction?

The process matrix formalism allows us to go beyond the quantum circuit framework and study processes for which there may be no global causal order between events. While the notion of causal (non)separability has been well studied in the bipartite…

Young scientists of IQOQI-Vienna and the University of Vienna are organizing an event aimed at discussing future perspectives of the scientific publishing system and present concrete alternatives to its current structure.

What allowed Einstein to transcend Newton's conception of an absolute time was his insistence on an operational definition of time as that which is measured by a clock. Quantum theory has yet to be liberated from this absolute notion of time as…

We extend the Wigner current vector field (Wigner current) construct to single bosonic mode quantum systems interacting with an environment.

We discuss how one can escape Heisenberg's uncertainty principl and measure position and momentum in modular fashion simultaneously. In order to make use of this for sensing, one needs to prepare the mechanical system in a so-called grid state.