Talk @UFF, Renato Angelo (UFPR), Friday Sept. 30th, 11:00Posted: September 29, 2016
This week’s group seminar at the infoptics group at UFF is by Renato Angelo (UFPR), titled: “A measure of physical reality”. It’ll take place next Friday, September 30th, at 11:00 in room A5-01 of the Physics building. All are welcome to attend! Please see below for an abstract.
Data: Sexta-Feira 30/09/2016, Sala A5-01, 11 am.
Palestrante: Renato M. Angelo (UFPR)
Título: A measure of physical reality
Abstract: From the premise that an observable is real after it is measured, we envisage a tomography-based protocol that allows us to propose a quantifier for the degree of indefiniteness of an observable given a quantum state. Then, we find that the reality of an observable can be inferred locally only if this observable is not quantumly correlated with an informer. In other words, quantum discord precludes Einstein’s notion of separable realities. Also, by monitoring changes in the local reality upon measurements on a remote system, we are led to define a measure of nonlocality. Proved upper bounded by discordlike correlations and requiring indefiniteness as a basic ingredient, our measure signals nonlocality even for separable states, thus revealing nonlocal aspects that are not captured by Bell inequality violations.
Europhysics Letters 112, 40005 (2015)