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Classical theories with entanglement
Giacomo Mauro D'Ariano, Marco Erba, Paolo Perinotti
We investigate operational probabilistic theories where the pure states of every system are the vertices of a simplex. A special case of such theories is that of classical theories…
Information and disturbance in operational probabilistic theories
Giacomo Mauro D'Ariano, Paolo Perinotti, Alessandro Tosini
Any measurement is intended to provide information on a system, namely knowledge about its state. However, we learn from quantum theory that it is generally impossible to extract i…
Chirality from quantum walks without quantum coin
Giacomo Mauro D'Ariano, Marco Erba, Paolo Perinotti
Quantum walks (QWs) describe the evolution of quantum systems on graphs. An intrinsic degree of freedom---called the coin and represented by a finite-dimensional Hilbert space---is…