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8 papers · 1 filter
State-independent quantum contextuality with single photons
Elias Amselem, Magnus Radmark, Mohamed Bourennane +1
We present an experimental state-independent violation of an inequality for noncontextual theories on single particles. We show that 20 different single-photon states violate an in…
Experimental high fidelity six-photon entangled state for telecloning protocols
Magnus Radmark, Marek Zukowski, Mohamed Bourennane
We experimentally generate and characterize a six-photon polarization entangled state, which is usually called "Psi 6 +". This is realized with a filtering procedure of triple emis…
Addendum to "Experimental demonstration of a quantum protocol for Byzantine agreement and liar detection" arXiv:0710.0290
Sascha Gaertner, Mohamed Bourennane, Christian Kurtsiefer +2
Gao et al. [Phys. Rev. Lett. 101, 208901 (2008)] have described a possible intercept-resend attack for the quantum protocol for detectable Byzantine agreement in Phys. Rev. Lett. 1…
Universality of state-independent violation of correlation inequalities for noncontextual theories
Piotr Badziag, Ingemar Bengtsson, Adan Cabello +1
We show that the state-independent violation of inequalities for noncontextual hidden variable theories introduced in [Phys. Rev. Lett. 101, 210401 (2008)] is universal, i.e., occu…
The Frame Potential, on Average
Ingemar Bengtsson, Helena Granstrom
A SIC consists of N^2 equiangular unit vectors in an N dimensional Hilbert space. The frame potential is a function of N^2 unit vectors. It has a unique global minimum if the vecto…
Experimental demonstration of a quantum protocol for Byzantine agreement and liar detection
Sascha Gaertner, Mohamed Bourennane, Christian Kurtsiefer +2
We introduce a new quantum protocol for solving detectable Byzantine agreement (also called detectable broadcast) between three parties, and also for solving the detectable liar de…