Entanglement at distance: qubits versus continuous variables
Giacomo Mauro D’Ariano, Massimiliano Federico Sacchi · Fortschritte der Physik · 2003
Abstract We consider the problem of obtaining maximally entangled photon states at distance in the presence of loss. We compare the efficiency of two different schemes in establishing N shared ebits: i) N single ebit states with the qubit encoded on polarization; ii) a single continuous variable entangled state (emode) assisted by optimal local operation and classical communication (LOCC) protocol in order to obtain a 2N‐dimensional maximally entangled state, with qubits encoded on the photon number.