Quantum superpositions of causal orders as an operational resource

• Published in: Physical review research Vol. 1; no. 3; p. 033174
• Main Authors: Taddei, Márcio M., Nery, Ranieri V., Aolita, Leandro
• Format: Journal Article
• Language: English
• Published: American Physical Society 13.12.2019

Causal nonseparability refers to processes where events take place in a coherent superposition of different causal orders. These may be the key resource for experimental violations of causal inequalities and have been recently identified as resources for concrete information-theoretic tasks. Here, w...