248 citations · 857 across the 15 of their papers we have counts for
3 papers · 2 filters
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…
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…
Indefinite Causal Order in a Quantum Switch
K. Goswami, C. Giarmatzi, M. Kewming +4
In quantum mechanics events can happen in no definite causal order: in practice this can be verified by measuring a causal witness, in the same way that an entanglement witness ver…