We analyzed the security of the secure direct communication protocol based on the secret
transmitting order of particles recently proposed by Zhu, Xia, Fan, and Zhang [Phys. Rev. A …

We present a way for entanglement purification based on two parametric down-conversion
(PDC) sources with cross-Kerr nonlinearities. It is comprised of two processes. The first one …

We present two realistic entanglement concentration protocols (ECPs) for pure partially
entangled photons. A partially entangled photon pair can be concentrated to a maximally …

We investigate the usefulness of a recently introduced five-qubit state by Brown et al.[IDK
Brown, S. Stepney, A. Sudbery, and SL Braunstein, J. Phys. A 38, 1119 (2005)] for quantum …

We present an entanglement purification protocol and an entanglement concentration
protocol for electron-spin entangled states, resorting to quantum-dot spin and optical …

We present an efficient quantum repeater protocol that uses coupled systems of quantum-
dot spins and optical microcavities, in which the spatial entanglement of a photon system …

We present two two-step practical entanglement concentration protocols for concentrating
an arbitrary three-particle less-entangled W state into a maximally entangled W state …

We present a nonlocal entanglement concentration scheme for reconstructing some
maximally entangled multipartite states from partially entangled ones by exploiting cross …

We present an entanglement purification protocol (EPP) to reconstruct some maximally
hybrid entangled states (HESs) from nonmaximally mixed HESs. We use simple linear …

Multiparty remote state preparation (MRSP) is a procedure for multiparty collaboration with
each other for remote preparation of a known quantum state to a distant party. We show that …