226 citations · 1.4k across the 41 of their papers we have counts for
42 papers
Every non-signalling channel is common-cause realizable
Paulo J. Cavalcanti, John H. Selby, Ana Belén Sainz
In this work we show that the set of non-signalling resources of a locally-tomographic generalised probabilistic theory (GPT), such as quantum and classical theory, coincides with…
Contextuality with vanishing coherence and maximal robustness to dephasing
Vinicius P. Rossi, David Schmid, John H. Selby +1
Generalized contextuality is a resource for a wide range of communication and information processing protocols. However, contextuality is not possible without coherence, and so can…
The resource theory of nonclassicality of channel assemblages
Beata Zjawin, David Schmid, Matty J. Hoban +1
When two parties, Alice and Bob, share correlated quantum systems and Alice performs local measurements, Alice's updated description of Bob's state can provide evidence of nonclass…
A hierarchy of semidefinite programs for generalised Einstein-Podolsky-Rosen scenarios
Matty J. Hoban, Tom Drescher, Ana Belén Sainz
Correlations in Einstein-Podolsky-Rosen (EPR) scenarios, captured by \textit{assemblages} of unnormalised quantum states, have recently caught the attention of the community, both…
Simulating all multipartite non-signalling channels via quasiprobabilistic mixtures of local channels in generalised probabilistic theories
Paulo J. Cavalcanti, John H. Selby, Jamie Sikora +1
Non-signalling quantum channels -- relevant in, e.g., the study of Bell and Einstein-Podolsky-Rosen scenarios -- may be simulated via affine combinations of local operations in bip…
A linear program for testing nonclassicality and an open-source implementation
John H. Selby, Elie Wolfe, David Schmid +2
A well motivated method for demonstrating that an experiment resists any classical explanation is to show that its statistics violate generalized noncontextuality. We here formulat…
On characterising assemblages in Einstein-Podolsky-Rosen scenarios
Vinicius P. Rossi, Matty J. Hoban, Ana Belén Sainz
Characterising non-classical quantum phenomena is crucial not only from a fundamental perspective, but also to better understand its capabilities for information processing and com…
Q-Turn: Changing Paradigms In Quantum Science
Ana Belén Sainz
Quantum information is a rapidly-growing interdisciplinary field at the intersection of information science, computer science, mathematics, philosophy, and quantum science, working…
Avenues to generalising Bell inequalities
Marcin Karczewski, Giovanni Scala, Antonio Mandarino +2
Characterizing the set of all Bell inequalities is a notably hard task. An insightful method of solving it in case of Bell correlation inequalities for scenarios with two dichotomi…
Accessible fragments of generalized probabilistic theories, cone equivalence, and applications to witnessing nonclassicality
John H. Selby, David Schmid, Elie Wolfe +3
The formalism of generalized probabilistic theories (GPTs) was originally developed as a way to characterize the landscape of conceivable physical theories. Thus, the GPT describin…
Quantifying EPR: the resource theory of nonclassicality of common-cause assemblages
Beata Zjawin, David Schmid, Matty J. Hoban +1
Einstein-Podolsky-Rosen (EPR) steering is often (implicitly or explicitly) taken to be evidence for spooky action-at-a-distance. An alternative perspective on steering is that Alic…
Contextuality without incompatibility
John H. Selby, David Schmid, Elie Wolfe +3
The existence of incompatible measurements is often believed to be a feature of quantum theory which signals its inconsistency with any classical worldview. To prove the failure of…
Post-quantum steering is a stronger-than-quantum resource for information processing
Paulo J. Cavalcanti, John H. Selby, Jamie Sikora +2
We present the first instance where post-quantum steering is a stronger-than-quantum resource for information processing -- remote state preparation. In addition, we show that the…
Correlations constrained by composite measurements
John H. Selby, Ana Belén Sainz, Victor Magron +2
How to understand the set of correlations admissible in nature is one outstanding open problem in the core of the foundations of quantum theory. Here we take a complementary viewpo…
Revisiting dynamics of quantum causal structures -- when can causal order evolve?
John H. Selby, Ana Belén Sainz, Paweł Horodecki
Recently, there has been substantial interest in studying the dynamics of quantum theory beyond that of states, in particular, the dynamics of channels, measurements, and higher-or…
Understanding the interplay of entanglement and nonlocality: motivating and developing a new branch of entanglement theory
David Schmid, Thomas C. Fraser, Ravi Kunjwal +3
A standard approach to quantifying resources is to determine which operations on the resources are freely available, and to deduce the partial order over resources that is induced…
The complexity of compatible measurements
Paul Skrzypczyk, Matty J. Hoban, Ana Belén Sainz +1
Measurement incompatibility is one of the basic aspects of quantum theory. Here we study the structure of the set of compatible -- i.e. jointly measurable -- measurements. We are i…
Reference frames which separately store non-commuting conserved quantities
Sandu Popescu, Ana Belén Sainz, Anthony J. Short +1
Even in the presence of conservation laws, one can perform arbitrary transformations on a system if given access to a suitable reference frame, since conserved quantities may be ex…
Bipartite post-quantum steering in generalised scenarios
Ana Belén Sainz, Matty J. Hoban, Paul Skrzypczyk +1
The study of stronger-than-quantum effects is a fruitful line of research that provides valuable insight into quantum theory. Unfortunately, traditional bipartite steering scenario…
Quantifying Bell: the Resource Theory of Nonclassicality of Common-Cause Boxes
Elie Wolfe, David Schmid, Ana Belén Sainz +2
We take a resource-theoretic approach to the problem of quantifying nonclassicality in Bell scenarios. The resources are conceptualized as probabilistic processes from the setting…
Quantum Reference Frames and Their Applications to Thermodynamics
Sandu Popescu, Ana Belén Sainz, Anthony J. Short +1
We construct a quantum reference frame, which can be used to approximately implement arbitrary unitary transformations on a system in the presence of any number of extensive conser…
Quantum violations in the Instrumental scenario and their relations to the Bell scenario
Thomas Van Himbeeck, Jonatan Bohr Brask, Stefano Pironio +3
The causal structure of any experiment implies restrictions on the observable correlations between measurement outcomes, which are different for experiments exploiting classical, q…
Almost Quantum Correlations are Inconsistent with Specker's Principle
Tomáš Gonda, Ravi Kunjwal, David Schmid +2
Ernst Specker considered a particular feature of quantum theory to be especially fundamental, namely that pairwise joint measurability of sharp measurements implies their global jo…
A formalism for steering with local quantum measurements
A. B. Sainz, L. Aolita, M. Piani +2
We develop a unified approach to classical, quantum and post-quantum steering. The framework is based on uncharacterised (black-box) parties performing quantum measurements on thei…