Strong violations of Bell-type inequalities for Werner-like states

Understand

We investigate the violation of Bell-type inequalities for two-qubit Werner-like states parametrized by the positive parameter 0<p<1.

• We use an unbalanced homodyne detection scheme to obtain the quantum mechanical probabilities.
• A violation of the Bell-Wigner and Janssens inequalities is obtained for a large range of the parameter p.
• The range given by these inequalities is greater than the one given by the Clauser-Horne inequality.