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Quantum theory cannot violate a causal inequality

Publikováno v: Phys. Rev. Lett. 127, 110402 (2021)

Within quantum theory, we can create superpositions of different causal orders of events, and observe interference between them. This raises the question of whether quantum theory can produce results that would be impossible to replicate with any cla

Externí odkaz: http://arxiv.org/abs/2101.09107

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The operational significance of the quantum resource theory of Buscemi nonlocality

Autor: Lipka-Bartosik, Patryk, Ducuara, Andrés, Purves, Tom, Skrzypczyk, Paul

Publikováno v: PRX Quantum 2, 020301 (2021)

Although entanglement is necessary for observing nonlocality in a Bell experiment, there are entangled states which can never be used to demonstrate nonlocal correlations. In a seminal paper [PRL 108, 200401 (2012)] F. Buscemi extended the standard B

Externí odkaz: http://arxiv.org/abs/2010.04585

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Channels, measurements and post-selection in quantum thermodynamics

Autor: Purves, Tom, Short, Tony

Publikováno v: Phys. Rev. E 104, 014111 (2021)

We analyse the benefit, in terms of extracting work, of having a single use of a quantum channel or measurement in quantum thermodynamics. This highlights a connection between unital and catalytic channels, and some subtleties concerning the conditio

Externí odkaz: http://arxiv.org/abs/2008.09065

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Tripartite non-classical correlations without backwards in time signalling

Autor: Purves, Tom, Short, Anthony J.

Publikováno v: Phys. Rev. A 99, 022101 (2019)

We investigate the relationship between no backwards in time signaling and classically causal correlations. We discover that unlike the case for two parties, the no backwards in time signaling paradigm for three parties is not enough to ensure that c

Externí odkaz: http://arxiv.org/abs/1809.06620

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