Role of Hybrid Cloners for Broadcasting Quantum Entanglement

임의순

Manish Kumar Shukla, Indranil Chakrabarty, Sourav Chatterjee

Eui-Soon Yim, Yong Jin Shin

Eui Soon YIM

Eui-Soon Yim

Somshubhro Bandyopadhyay, Guruprasad Kar

We study broadcasting of entanglement where we use universal quantum cloners (in general less optimal) to perform local cloning operations. We show that there is a lower bound on the fidelity of the universal quantum cloners that can be used for broadcasting. We prove that an entanglement is optimally broadcast only when optimal quantum cloners are used for local copying. We also show that broadcasting of entanglement into more than two entangled pairs is forbidden using only local operations.