684 citations · 3.4k across the 49 of their papers we have counts for
3 papers · 1 filter
Witnessing quantum memory in non-Markovian processes
Christina Giarmatzi, Fabio Costa
We present a method to detect quantum memory in a non-Markovian process. We call a process Markovian when the environment does not provide a memory that retains correlations across…
Relativity of quantum superpositions
Magdalena Zych, Fabio Costa, Timothy C. Ralph
In modern physics only relative quantities are considered to have physical significance. For example, position assigned to a system depends on the choice of coordinates, and only r…
Violation of a causal inequality in a spacetime with definite causal order
C. T. Marco Ho, Fabio Costa, Christina Giarmatzi +1
Processes with an indefinite causal structure may violate a causal inequality, which quantifies quantum correlations that arise from a lack of causal order. In this paper, we show…