Quantum secret sharing based on reusable Greenberger-Horne-Zeilinger states as secure carriers

Abstract

We introduce a protocol for quantum secret sharing based on reusable entangled states. The entangled state between the sender and the receiver acts only as a carrier to which data bits are entangled by the sender and disentangled from it by the receivers, all by local actions of simple gates. We also show that the interception by Eve or the cheating of one of the receivers introduces a quantum bit error rate (QBER) larger than 25 percent which can be detected by comparing a subsequence of the bits.

Efficient symmetric multiparty quantum state sharing of an arbitrarym-qubit state

“…Its intrinsic efficiency for qubits η q [8], the ratio of number of theoretical valid transmitted qubits to the number of transmitted qubits is about 50% as half of the instances will be abandoned [9]. Now, there are some theoretic schemes for sharing and splitting a classical message [5,7,9,10,11,12,13,14,15,16,17,18,19,20,21,22]. The experiment demonstration of QSS was also studied by some groups [23,24].…”

Scheme for Implementing Teleporting an Arbitrary Tripartite Entangled State in Cavity QED

“…Here, if we take α = β = γ = δ = 1/2, it just reduces to the even parity state [25], which is local equivalent to the tripartite GHZ state. On the other hand, if we take α = 0, β = γ = δ = 1/ √ 3, it will be the well-known W state.…”

Schemes for Splitting Quantum Information via Tripartite Entangled States

“…Alice, Bob, and Charlie share a tripartite entangled state [41,42] |φ 234 = 1 2 (|000 + |110 + |101 + |011 ) 234 .…”