Results 41 to 50 of about 4,469 (136)

Semi-device-independent framework based on natural physical assumptions [PDF]

Quantum, 2017
The semi-device-independent approach provides a framework for prepare-and-measure quantum protocols using devices whose behavior must not be characterized nor trusted, except for a single assumption on the dimension of the Hilbert space characterizing ...
Thomas Van Himbeeck, Erik Woodhead, Nicolas J. Cerf, Raúl García-Patrón, Stefano Pironio   +4 more
doaj   +1 more source

Maximal violation of the I3322 inequality using infinite dimensional quantum systems

, 2010
The I3322 inequality is the simplest bipartite two-outcome Bell inequality beyond the Clauser-Horne-Shimony-Holt (CHSH) inequality, consisting of three two-outcome measurements per party.
A. A. Méthot, B. S. Tsirelson, J. S. Bell, Károly F. Pál, R. F. Werner, Tamás Vértesi   +5 more
core   +1 more source

Maximizing device-independent randomness from a Bell experiment by optimizing the measurement settings

, 2016
The rates at which a user can generate device-independent quantum random numbers from a Bell-type experiment depend on the measurements that he performs.
Assad, Syed M, Lam, Ping Koy, Thearle, Oliver   +2 more
core   +1 more source

Effects of preparation and measurement misalignments on the security of the BB84 quantum key distribution protocol [PDF]

, 2013
The ideal Bennett-Brassard 1984 (BB84) quantum key distribution protocol is based on the preparation and measurement of qubits in two alternative bases differing by an angle of pi/2.
Pironio, Stefano, Woodhead, Erik
core   +1 more source

Security of Device-Independent Quantum Key Distribution in the Bounded-Quantum-Storage Model

Physical Review X, 2013
Device-independent quantum key distribution (DIQKD) is a formalism that supersedes traditional quantum key distribution, as its security does not rely on any detailed modeling of the internal working of the devices.
S. Pironio, Ll. Masanes, A. Leverrier, A. Acín   +3 more
doaj   +1 more source

Causal hierarchy of multipartite Bell nonlocality

, 2017
As with entanglement, different forms of Bell nonlocality arise in the multipartite scenario. These can be defined in terms of relaxations of the causal assumptions in local hidden-variable theories.
Aolita, Leandro, Cavalcanti, Daniel, Chaves, Rafael   +2 more
core   +2 more sources

Optimal randomness certification from one entangled bit

, 2015
By performing local projective measurements on a two-qubit entangled state one can certify in a device-independent way up to one bit of randomness. We show here that general measurements, defined by positive-operator-valued measures, can certify up to ...
Acín, Antonio, Pironio, Stefano, Vértesi, Tamás, Wittek, Peter   +3 more
core   +1 more source

Optimal randomness generation from optical Bell experiments [PDF]

, 2014
Genuine randomness can be certified from Bell tests without any detailed assumptions on the working of the devices with which the test is implemented. An important class of experiments for implementing such tests is optical setups based on polarisation ...
Acín, Antonio, Brask, Jonatan Bohr, Cavalcanti, Daniel, Máttar, Alejandro, Skrzypczyk, Paul   +4 more
core   +3 more sources

Device-independent randomness generation from several Bell estimators

New Journal of Physics, 2018
Device-independent randomness generation and quantum key distribution protocols rely on a fundamental relation between the non-locality of quantum theory and its random character.
Olmo Nieto-Silleras, Cédric Bamps, Jonathan Silman, Stefano Pironio   +3 more
doaj   +1 more source

Joint-measurability and quantum communication with untrusted devices [PDF]

Quantum
Photon loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches.
Michele Masini, Marie Ioannou, Nicolas Brunner, Stefano Pironio, Pavel Sekatski   +4 more
doaj   +1 more source