301 citations · 2.5k across the 60 of their papers we have counts for
4 papers · 1 filter
Von Neumann Entropy in QFT
Roberto Longo, Feng Xu
In the framework of Quantum Field Theory, we provide a rigorous, operator algebraic notion of entanglement entropy associated with a pair of open double cones …
The emergence of time
Roberto Longo
Classically, one could imagine a completely static space, thus without time. As is known, this picture is unconceivable in quantum physics due to vacuum fluctuations. The fundament…
The information in a wave
Fabio Ciolli, Roberto Longo, Giuseppe Ruzzi
We provide the notion of entropy for a classical Klein-Gordon real wave, that we derive as particular case of a notion entropy for a vector in a Hilbert space with respect to a rea…
Entropy of Coherent Excitations
Roberto Longo
We provide a rigorous, explicit formula for the vacuum relative entropy of a coherent state on wedge local von Neumann algebras associated with a free, neutral quantum field theory…