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Revealing Bell's Nonlocality for Unstable Systems in High Energy Physics
Beatrix C. Hiesmayr, Antonio Di Domenico, Catalina Curceanu +4
Entanglement and its consequences - in particular the violation of Bell inequalities, which defies our concepts of realism and locality - have been proven to play key roles in Natu…
A contextual extension of Spekkens' toy model
Jan-Åke Larsson
Quantum systems show contextuality. More precisely, it is impossible to reproduce the quantum-mechanical predictions using a non-contextual realist model, i.e., a model where the o…
Optimal measurement bases for Bell-tests based on the CH-inequality
G. Lima, E. B. Inostroza, R. O. Vianna +2
The Hardy test of nonlocality can be seen as a particular case of the Bell tests based on the Clauser-Horne (CH) inequality. Here we stress this connection when we analyze the rela…
Security of Authentication with a Fixed Key in Quantum Key Distribution
Aysajan Abidin, Jan-Åke Larsson
We study the security of a specific authentication procedure of interest in the context of Quantum Key Distribution (QKD). It works as follows: use a secret but fixed Strongly Univ…
Energy-time entanglement, Elements of Reality, and Local Realism
Jonathan Jogenfors, Jan-Åke Larsson
The Franson interferometer, proposed in 1989 [J. D. Franson, Phys. Rev. Lett. 62:2205-2208 (1989)], beautifully shows the counter-intuitive nature of light. The quantum description…
The monomial representations of the Clifford group
D. M. Appleby, Ingemar Bengtsson, Stephen Brierley +3
We show that the Clifford group - the normaliser of the Weyl-Heisenberg group - can be represented by monomial phase-permutation matrices if and only if the dimension is a square n…