6 papers
Time-reparameterisation invariant quantum evolution law: the lack of absolute time does not imply a stationary global state
Ognyan Oreshkov, Denis Bouvy
We challenge the common belief that if there is no absolute time parameter in physics, a quantum system described without reference to an external clock can be assumed to be in a s…
Generalizing Bell nonlocality without global causal assumptions
Ravi Kunjwal, Ognyan Oreshkov
Bell scenarios are multipartite scenarios that exclude any communication between parties. This constraint leads to a strict hierarchy of correlation sets in such scenarios, namely,…
Parity erasure: a foundational principle for indefinite causal order
Zixuan Liu, Ognyan Oreshkov
Processes with indefinite causal order can arise when quantum theory is locally valid and they allow accomplishing new informational tasks. Despite recent progress, the correlation…
Projective characterization of higher-order quantum transformations
Timothée Hoffreumon, Ognyan Oreshkov
Transformations of transformations, also called higher-order transformations, is a natural concept in information processing, which has recently attracted significant interest in t…
Proceedings of the 22nd International Conference on Quantum Physics and Logic
Alejandro DÃaz-Caro, Ognyan Oreshkov, Ana Belén Sainz
This volume contains the proceedings of the 22nd International Conference on Quantum Physics and Logic (QPL 2025), which was held from 14th to 18th July 2025, in Varna, Bulgaria, o…
Nonclassicality in correlations without causal order
Ravi Kunjwal, Ognyan Oreshkov
Bell scenarios are multipartite scenarios that exclude any signalling between parties. This leads to a strict hierarchy of classical, quantum, and non-signalling correlations in su…