67 citations · 97 across the 8 of their papers we have counts for
9 papers
What makes a causal loop consistent?
Hippolyte Dourdent, Andreas Leitherer, Emanuel-Cristian Boghiu +3
Causal loops escape paradoxes if they generate valid probabilities under arbitrary independent local interventions. We show that a deterministic classical process is logically cons…
Paradox-free classical non-causality and unambiguous non-locality without entanglement are equivalent
Hippolyte Dourdent, Kyrylo Simonov, Andreas Leitherer +5
Closed timelike curves (CTCs) challenge our conception of causality by allowing information to loop back into its own past. Any consistent description of such scenarios must avoid…
Simulating Noncausality with Quantum Control of Causal Orders
Anna Steffinlongo, Hippolyte Dourdent
Logical consistency with free local operations is compatible with non-trivial classical communications, where all parties can be both in each other's past and future-a phenomenon k…
Network-Device-Independent Certification of Causal Nonseparability
Hippolyte Dourdent, Alastair A. Abbott, Ivan Šupić +1
Causal nonseparability is the property underlying quantum processes incompatible with a definite causal order. So far it has remained a central open question as to whether any proc…
Comparing the quantum switch and its simulations with energetically-constrained operations
Marco Fellous-Asiani, Raphaël Mothe, Léa Bresque +5
Quantum mechanics allows processes to be superposed, leading to a genuinely quantum lack of causal structure. For example, the process known as the quantum switch applies two opera…
Semi-Device-Independent Certification of Causal Nonseparability with Trusted Quantum Inputs
Hippolyte Dourdent, Alastair A. Abbott, Nicolas Brunner +2
While the standard formulation of quantum theory assumes a fixed background causal structure, one can relax this assumption within the so-called process matrix framework. Remarkabl…
Quantum circuits with classical versus quantum control of causal order
Julian Wechs, Hippolyte Dourdent, Alastair A. Abbott +1
Quantum supermaps are transformations that map quantum operations to quantum operations. It is known that quantum supermaps which respect a definite, predefined causal order betwee…
A Quantum Gödelian Hunch
Hippolyte Dourdent
What if the paradoxical nature of quantum theory could find its source in some undecidability analog to that of Gödel's incompleteness theorem ? This essay aims at arguing for such…
Contextuality, Witness of Quantum Weirdness
Hippolyte Dourdent
The notion of contextuality, which emerges from a theorem established by Simon Kochen and Ernst Specker (1960-1967) and by John Bell (1964-1966), is certainly one of the most funda…