Optimizing the scheme of bidirectional controlled quantum teleportation with a genuine five-qubit entangled state

Abstract

A bidirectional controlled quantum teleportation (BCQT) scheme was proposed by Yan Chen [Int. J. Theor. Phys. 53, 1454 (2014)] with a genuine five-qubit entangled state as quantum channel. In the scheme two remote participants have to perform some two-qubit joint operations to accomplish the BCQT task. Such joint operations are nonlocal and usually regarded as serious faults in some sense. To overcome them, in this paper we put forward an optimized version. Our scheme has the distinct advantages of degrading the necessary-operation complexity (i.e., both intensity and difficulty) and consuming fewer classical resources as well as owing higher intrinsic efficiency in contrast to Chen’s. Besides, it is feasible in experiment and applicable in the intending quantum network.

Convenient quantum controlled teleportation of two-qubit pure state with seven-qubit entangled state

“…Only obtaining the approve and help of the controllers, the receiver can successfully reconstruct the teleported state. Since it can be used as a remote quantum controlled technology, CQT has attracted extensive attentions [42,[57][58][59][60][61][62][63][64][65][66][67][68][69][70] in the past two decades. It should be mentioned that based on a seven-qubit entangled state, Chen et al [67] put forwarded a tripartite CQT scheme (referred to as CLLYZ-CQT scheme hereafter) in which a Bell state can be remotely transmitted under the control of a supervisor.…”

Asymmetric bidirectional quantum 1⇔2 qubit teleportation scheme via six-qubit Bell-cluster state

“…That is to say, there are two opposite and simultaneous quantum teleportation processes in a BQT task. Due to its higher communication capacity and intrinsic efficiency, BQT has attracted a large number of researchers' attention [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53], and various quantum entanglement resources have been applied as its quantum channels, such as cluster states [36,42,44,51,52], Bell states [40,53], GHZ states [38,41,46,53], Brown states [43,49], and other multi-qubit entangled states [37,39,45,47,48,50].…”

Cryptanalysis of a Semi-Quantum Bi-Signature Scheme Based on W States

“…With advances in quantum information science, various quantum techniques have been applied in quantum cryptography, such as entanglement swapping [ 1 ], quantum teleportation [ 2 , 3 , 4 ], and quantum remote control [ 5 , 6 , 7 , 8 , 9 , 10 ]. Quantum cryptography techniques can be used in various network communication environments, among which quantum signature is an important topic.…”