Bell states in a resonant quantum waveguide network
Gürsoy B. Akgüç, L. E. Reichl, Anil Shaji, Michael G. Snyder · Physical Review A · 2004
We show that a network of ballistic electron waveguides can generate entangled Bell-like states from separable states when it is resonant. The network we study is grouped into individual qudits $(d=4)$ made up of pairs of waveguides. Rotation gates in the network produce coherent superpositions of qudit states. A Coulomb gate entangles the qudits. We construct a unitary matrix which characterizes the network dynamics and allows a more systematic study of that dynamics.