Bipartite Quantum Entanglement

Nian-Quan Jiang

The characteristics and preparation of bipartite entangled state were presented in this paper.The decompositions of bipartite and tripartite entangled states of continuous variables in coordinate representation were obtained by using the normal product technique.And their completeness and orthonormality were shown at the same time.Then a scheme to transport a kind of tripartite entangled state of continuous variables by using a quantum channel composed of three bipartite entangled states was proposed.

Ved Prakash Gupta, Prabha Mandayam, Viakalathur Shankar Sunder

Libin Fu, Jing‐Ling Chen, Xian-Geng Zhao +1 more

We present an alternative definition of quantum entanglement for bipartite system based on Bell inequality and operators' noncommutativity. A state is said to be entangled, if the maximum of CHSH expectation value $F_{\max}$ is obtain by noncommutative measures on each particle of the bipartite system; otherwise, the state is a disentangled state. A uniform measure quantifying the degree of entanglement for any state of the bipartite system is also proposed.

Aldo Moro, Settore Scientifico, Disciplinare Fis +1 more

Dariusz Chruściński

Levente Szabó, Mátyás Koniorczyk, Петер Адам +1 more

We consider the entanglement manipulation capabilities of the universal covariant quantum cloner or quantum processor circuit for quantum bits. We investigate its use for cloning a member of a bipartite or a genuine tripartite entangled state of quantum bits. We find that for bipartite pure entangled states a nontrivial behavior of concurrence appears, while for GHZ entangled states a possibility of the partial extraction of bipartite entanglement can be achieved.