5 papers
Aligning Spatial Frames Through Quantum Channels
E. Bagan, R. Munoz-Tapia
We review the optimal protocols for aligning spatial frames using quantum systems. The communication problem addressed here concerns a type of information that cannot be digitalize…
Optimal reconstruction of a pure qubit state with local measurements
E. Bagan, M. Baig, A. Monras +1
We analyse the reconstruction of an unknown pure qubit state. We derive the optimal guess that can be inferred from any set of measurements on N identical copies of the system with…
Communicating a direction using spin states
E. Bagan, M. Baig, R. Munoz-Tapia
The communication of directions using quantum states is a useful laboratory test for some basic facts of quantum information. For a system of spin-1/2 particles there are different…
Limits on the Mass of the Lightest SUSY Higgs
M. Masip, R. Munoz-Tapia
We study the limits on the mass of the lightest Higgs in supersymmetric models extended with a gauge singlet when perturbative unification is required. We find that when maximum in…
Heavy flavour tagging and QCD tests in four-jet events at LEP1
S. Moretti, R. Munoz-Tapia, J. B. Tausk
We present a theoretical review of the possibilities offered by heavy flavour tagging in testing QCD features in 4-jet events at LEP1. Attention is focused mainly on the properties…