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Quantum teleportation of quantum causal structures
Marius Krumm, Philippe Allard Guérin, Thomas Zauner +1
Quantum teleportation is a very helpful information-theoretic protocol that allows to transfer an unknown arbitrary quantum state from one location to another without having to tra…
Quantum reference frame transformations as symmetries and the paradox of the third particle
Marius Krumm, Philipp A. Hoehn, Markus P. Mueller
In a quantum world, reference frames are ultimately quantum systems too -- but what does it mean to "jump into the perspective of a quantum particle"? In this work, we show that qu…
Semi-device-independent information processing with spatiotemporal degrees of freedom
Andrew J. P. Garner, Marius Krumm, Markus P. Mueller
Nonlocality, as demonstrated by the violation of Bell inequalities, enables device-independent cryptographic tasks that do not require users to trust their apparatus. In this artic…
Composition rules for quantum processes: a no-go theorem
Philippe Allard Guérin, Marius Krumm, Costantino Budroni +1
A quantum process encodes the causal structure that relates quantum operations performed in local laboratories. The process matrix formalism includes as special cases quantum mecha…
Quantum computation is the unique reversible circuit model for which bits are balls
Marius Krumm, Markus P. Mueller
The computational efficiency of quantum mechanics can be defined in terms of the qubit circuit model, which is characterized by a few simple properties: each computational gate is…