4 papers
Higher-Order Programs with Indefinite Causal Orders: a Linear Approach to Coherent Control of Quantum Processes
Kathleen Barsse, Romain Péchoux, Simon Perdrix
Processes with indefinite causal orders (ICOs), such as the quantum switch, are higher-order quantum processes that superpose the order in which quantum operations are performed. S…
Quantum Control and General Recursion beyond the Unitary Case
Kathleen Barsse, Romain Péchoux, Simon Perdrix
Coherent control, aka quantum control, is a central concept in quantum computing that is attracting increasing attention from both the quantum foundations and quantum software comm…
Disentangling signalling and causal influence
Kathleen Barsse, Paolo Perinotti, Alessandro Tosini +1
The causal effects activated by a quantum interaction are studied, modelling the last one as a bipartite unitary channel. The two parties, say Alice and Bob, can use the channel to…
Causal influence versus signalling for interacting quantum channels
Kathleen Barsse, Paolo Perinotti, Alessandro Tosini +1
A causal relation between quantum agents, say Alice and Bob, is necessarily mediated by an interaction. Modelling the last one as a reversible quantum channel, an intervention of A…