Bell's 1964 theorem, which states that the predictions of quantum theory cannot be
accounted for by any local theory, represents one of the most profound developments in the …

We review recent developments in the physics of ultracold atomic and molecular gases in
optical lattices. Such systems are nearly perfect realisations of various kinds of Hubbard …

A scheme for multiparty quantum state sharing of an arbitrary two-particle state is presented
with Einstein-Podolsky-Rosen pairs. Any one of the N agents has the access to regenerate …

We present a two-way protocol for the quantum key distribution with practical faint laser
pulses. It is secure when the faint laser pulses contain no more than two photons. The key …

We present the experimental observation of the symmetric four-photon entangled Dicke
state with two excitations| D 4 (2)⟩. A simple experimental setup allowed quantum state …

Secret sharing is a multiparty cryptographic task in which some secret information is split into
several pieces which are distributed among the participants such that only an authorized set …

In this Letter, we present quantum secret sharing and secret splitting protocols with single
photons running forth and back between the participating parties. The protocol has a high …

The participant attack is the most serious threat for quantum secret-sharing protocols. We
present a method to analyze the security of quantum secret-sharing protocols against this …

We discuss the four requirements for a real point-to-point quantum secure direct
communication (QSDC) first, and then present two efficient QSDC network schemes with an …

A circular quantum secret sharing protocol is proposed, which is useful and efficient when
one of the parties of secret sharing is remote to the others who are in adjacent, especially …