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14 papers · 2 filters
Experimental detection of quantum channel capacities
Álvaro Cuevas, Massimiliano Proietti, Mario Arnolfo Ciampini +4
We present an effcient experimental procedure that certifies non vanishing quantum capacities for qubit noisy channels. Our method is based on the use of a fixed bipartite entangle…
Multi-partite entanglement speeds up quantum key distribution in networks
Michael Epping, Hermann Kampermann, Chiara Macchiavello +1
The laws of quantum mechanics allow for the distribution of a secret random key between two parties. Here we analyse the security of a protocol for establishing a common secret key…
Witnessing quantum capacities of correlated channels
Chiara Macchiavello, Massimiliano F. Sacchi
We test a general method to detect lower bounds of the quantum channel capacity for two-qubit correlated channels. We consider in particular correlated dephasing, depolarising and…
Steady-state entanglement between distant quantum dots in photonic crystal dimers
J. P. Vasco, D. Gerace, P. S. S. Guimarães +1
We show that two spatially separated semiconductor quantum dots under resonant and continuous-wave excitation can be strongly entangled in the steady-state, thanks to their radiati…
No-hypersignaling principle
Michele Dall'Arno, Sarah Brandsen, Alessandro Tosini +2
A paramount topic in quantum foundations, rooted in the study of the EPR paradox and Bell inequalities, is that of characterizing quantum theory in terms of the space-like correlat…
Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering
L. G. Helt, Agata M. Branczyk, Marco Liscidini +1
We calculate that an appropriate modification of the field associated with only one of the photons of a photon pair can suppress generation of the pair entirely. From this general…