17 citations · 98 across the 21 of their papers we have counts for
9 papers · 1 filter
Algebraic paradoxes in adaptive quantum computation
Samson Abramsky, Rui Soares Barbosa, Carmen Constantin +1
Measurement-based quantum computation (MBQC) is a universal model of quantum computation whose full power requires adaptivity. Contextuality is known to power quantum advantage in…
Comment on 'The axiom of choice and the no-signalling principle'
Martti Karvonen
The main claim of Baumeler et al. (Proc. R. Soc. A 481, 20240601; arXiv:2206.08467) is that "functional (deterministic) no-signalling resources can be stronger than probabilistic o…
Why cut-and-choose quantum state verification cannot be both efficient and secure
Fabian Wiesner, Ziad Chaoui, Diana Kessler +2
Quantum state verification plays a vital role in many quantum cryptographic protocols, as it allows the use of quantum states from untrusted sources. While some progress has been m…
Why quantum state verification cannot be both efficient and secure: a categorical approach
Fabian Wiesner, Ziad Chaoui, Diana Kessler +2
The advantage of quantum protocols lies in the inherent properties of the shared quantum states. These states are sometimes provided by sources that are not trusted, and therefore…
Uncloneable Quantum Advice
Anne Broadbent, Martti Karvonen, Sébastien Lord
The famous no-cloning principle has been shown recently to enable a number of uncloneable functionalities. Here we address for the first time unkeyed quantum uncloneablity, via the…
Closing Bell: Boxing black box simulations in the resource theory of contextuality
Rui Soares Barbosa, Martti Karvonen, Shane Mansfield
This chapter contains an exposition of the sheaf-theoretic framework for contextuality emphasising resource-theoretic aspects, as well as some original results on this topic. In pa…
Neither Contextuality nor Nonlocality Admits Catalysts
Martti Karvonen
We show that the resource theory of contextuality does not admit catalysts, i.e., there are no correlations that can enable an otherwise impossible resource conversion and still be…
A comonadic view of simulation and quantum resources
Samson Abramsky, Rui Soares Barbosa, Martti Karvonen +1
We study simulation and quantum resources in the setting of the sheaf-theoretic approach to contextuality and non-locality. Resources are viewed behaviourally, as empirical models.…
Categories of Empirical Models
Martti Karvonen
A notion of morphism that is suitable for the sheaf-theoretic approach to contextuality is developed, resulting in a resource theory for contextuality. The key features involve usi…