91 citations · 105 across the 7 of their papers we have counts for
4 papers · 1 filter
Reassessing the advantage of indefinite causal orders for quantum metrology
Raphaël Mothe, Cyril Branciard, Alastair A. Abbott
The quantum switch, the canonical example of a process with indefinite causal order, has been claimed to provide various advantages over processes with definite causal orders for s…
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…
Quantum Query Complexity of Boolean Functions under Indefinite Causal Order
Alastair A. Abbott, Mehdi Mhalla, Pierre Pocreau
The standard model of quantum circuits assumes operations are applied in a fixed sequential "causal" order. In recent years, the possibility of relaxing this constraint to obtain c…
Weak entanglement improves quantum communication using only product measurements
Amélie Piveteau, Alastair A. Abbott, Sadiq Muhammad +2
We show that weakly entangled states can improve communication over a qubit channel using only separate, interference-free, measurements of individual photons. We introduce a commu…