39 citations · 76 across the 8 of their papers we have counts for
8 papers
Frame-Dependent Traces and the Third-Particle Paradox
Alessandro Palumbo, Luca Apadula
The Paradox of the Third Particle arises when comparing subsystem descriptions across Quantum Reference Frame (QRF) perspectives. We isolate two distinct origins of the Paradox: th…
Frame perspectives for process matrices: from coordinate parametrization to spacetime representation
Luca Apadula, Alexei Grinbaum, Časlav Brukner
We study how to implement and transform frame perspectives for quantum processes in the process-matrix formalism. We argue that, for pure processes, the causal reference frames (CR…
Higher-order transformations of bidirectional quantum processes
Luca Apadula, Alessandro Bisio, Giulio Chiribella +2
Bidirectional devices are devices for which the roles of the input and output ports can be exchanged. Mathematically, these devices are described by bistochastic quantum channels,…
Identification is Pointless: Quantum Coordinates, Localisation of Events, and the Quantum Hole Argument
Viktoria Kabel, Anne-Catherine de la Hamette, Luca Apadula +4
The study of quantum reference frames (QRFs) is motivated by the idea of taking into account the quantum properties of the reference frames used, explicitly or implicitly, in our d…
Quantum Reference Frames for Lorentz Symmetry
Luca Apadula, Esteban Castro-Ruiz, Časlav Brukner
Since their first introduction, Quantum Reference Frame (QRF) transformations have been extensively discussed, generalising the covariance of physical laws to the quantum domain. D…
No-signalling constrains quantum computation with indefinite causal structure
Luca Apadula, Alessandro Bisio, Paolo Perinotti
Quantum processes with indefinite causal structure emerge when we wonder which are the most general evolutions, allowed by quantum theory, of a set of local systems which are not a…
Unruh effect for detectors in superposition of accelerations
Luis C. Barbado, Esteban Castro-Ruiz, Luca Apadula +1
The Unruh effect is the phenomenon that accelerated observers detect particles even when inertial observers experience the vacuum state. In particular, uniformly accelerated observ…
Symmetries of the Dirac quantum walk and emergence of the de Sitter group
Luca Apadula, Alessandro Bisio, Giacomo Mauro D'Ariano +1
A quantum walk describes the discrete unitary evolution of a quantum particle on a discrete graph. Some quantum walks, referred to as the Weyl and Dirac quantum walks, provide a de…