7 papers
Simulating quantum measurements without superposition devices
Gabriele Cobucci, Alexander Bernal, Roope Uola +1
Superposition is the core feature that sets quantum theory apart from classical physics. Here, we investigate whether sets of quantum measurements can be modelled by using only dev…
Certifying coherence in quantum devices under classical control
Gabriele Cobucci, Nicola D'Alessandro, Raphael Brinster +3
Quantum states that do not commute exhibit coherence, but only when the device preparing them is assumed to be unaffected by classical parameters inaccessible to the experimenter.…
Maximally non-projective measurements are not always symmetric informationally complete
Gabriele Cobucci, Raphael Brinster, Shishir Khandelwal +4
Standard quantum measurements are projective. However, the full scope of quantum measurements is represented by positive operator-valued measures (POVMs) and many of these break th…
Operationally classical simulation of quantum states
Gabriele Cobucci, Alexander Bernal, Martin J. Renner +1
A classical state-preparation device cannot generate states in relative superposition. We introduce classical models in which devices that are individually unable to generate state…
Observation of Genuine High-dimensional Multi-partite Non-locality in Entangled Photon States
Xiao-Min Hu, Cen-Xiao Huang, Nicola d'Alessandro +10
Quantum information science has leaped forward with the exploration of high-dimensional quantum systems, offering greater potential than traditional qubits in quantum communication…
Absolute dimensionality of quantum ensembles
Alexander Bernal, Gabriele Cobucci, Martin J. Renner +1
The dimension of a quantum state is traditionally seen as the number of superposed distinguishable states in a given basis. We propose an absolute, i.e.~basis-independent, notion o…