Generation of two-qubit polarization maximally entangled mixed states
Nicholas A. Peters, Joseph B. Altepeter, David Branning, Paul M. Goldbart, Evan R. Jeffrey, Tzu-Chieh Wei, Paul G. Kwiat · 2003
Using type-I down-conversion, we extend the boundaries of experimentally accessible two-qubit polarization states. Specifically, we create and characterize maximally entangled mixed states that lie above the Werner state boundary in the tangle-entropy plane.