Partially entangled states bridge in quantum teleportation

We propose two efficient entanglement concentration protocols (ECPs) for arbitrary less-entangled single-photon entanglement state, in which the photon qubit has the polarization feature. The first ECP is in linear optics, and the second ECP is in nonlinear optics. The two ECPs have some attractive advantages. First, they can preserve the polarization feature of the photon qubit, while all the other existing ECPs for single photon state cannot achieve this goal. Second, they only require one pair of less-entangled single-photon entanglement state and some auxiliary single photons. Third, they only require local operations. Especially, the second ECP can be used repeatedly, which can increase its success probability largely. Based on above properties, our two ECPs, especially the second one may be useful in current and future quantum communication.

Section: The Second Ecp For the Single-photon Entanglementmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Zhou

Wang

et al. 2017

“…For Chika to perform this task, first, she needs to set up a close similarity such that the coefficient of a 0 should be |0 4 and that of b 0 should be |1 4 . To achieve this, she performs a local unitary operation U 1 = |0 4 1| − |1 4 0| on Q and then she introduces an auxiliary qubit, say T with state |0 T , which gives Q 1 = 2 −1 ( a 0 γ|00 4T + b 0 β|10 4T ).…”

Section: Probabilistic Teleportation Of An Arbitrary Single Qubit Statementioning

confidence: 99%

“…After the first teleportation protocol was proposed by Bennett et al, many researchers have proposed several quantum teleportation protocols ( [2][3][4][5][6][7][8][9][10][11] and Refs. therein).…”

Section: Introductionmentioning

confidence: 99%

Quantum teleportation and information splitting via four-qubit cluster state and a Bell state

Ramírez¹,

Falaye²,

Sun³

et al. 2017

Quantum teleportation provides a 'bodiless' way of transmitting the quantum state from one object to another, at a distant location, using a classical communication channel and a previously shared entangled state. In this paper, we present a tripartite scheme for probabilistic teleportation of an arbitrary single qubit state, without losing the information of the state being teleported, via a four-qubit cluster state of the form |φ 1234 = α|0000 + β|1010 + γ|0101 − η |1111 , as the quantum channel, where the nonzero real numbers α, β, γ, and η satisfy the relation |α| 2 +|β| 2 +|γ| 2 +|η| 2 = 1. With the introduction of an auxiliary qubit with state |0 , using a suitable unitary transformation and a positive-operator valued measure (POVM), the receiver can recreate the state of the original qubit. An important advantage of the teleportation scheme demonstrated here is that, if the teleportation fails, it can be repeated without teleporting copies of the unknown quantum state, if the concerned parties share another pair of entangled qubit. We also present a protocol for quantum information splitting of an arbitrary two-particle system via the aforementioned cluster state and a Bellstate as the quantum channel. Problems related to security attacks were examined for both the cases and it was found that this protocol is secure. This protocol is highly efficient and easy to implement.

“…Dai et al presented a scheme where a partially entangledGreenberger--Horne--Zeilinger (GHZ) state and a partially entangled W state are used as the quantum channel to teleport an unknown two-particle state from a sender to either of two receivers [8].In the future, long-distance transmission of quantum information through networks will emerge as an important field of research. With the development of quantum communication, research on multi-hop teleportation is required [16][17][18][19][20]. In order to transmit quantum information between nodes that do not share direct entanglement, intermediate nodes are usually introduced.…”

mentioning

confidence: 99%

Routing protocol for wireless quantum multi-hop mesh backbone network based on partially entangled GHZ state

Xiong

Zhang

et al. 2016

Self Cite

Quantum multi-hop teleportation is important in the field of quantum communication. In this study, we propose a quantum multi-hop communication model and a quantum routing protocol with multihop teleportation for wireless mesh backbone networks. Based on an analysis of quantum multi-hop protocols, a partially entangled Greenberger--Horne--Zeilinger (GHZ) state is selected as the quantum channel for the proposed protocol. Both quantum and classical wireless channels exist between two neighboring nodes along the route. With the proposed routing protocol, quantum information can be transmitted hop by hop from the source node to the destination node. Based on multi-hop teleportation based on the partially entangled GHZ state, a quantum route established with the minimum number of hops. The difference between our routing protocol and the classical one is that in the former, the processes used to find a quantum route and establish quantum channel entanglement occur simultaneously. The Bell state measurement results of each hop are piggybacked to quantum route finding information. This method reduces the total number of packets and the magnitude of air interface delay. The deduction of the establishment of a quantum channel between source and destination is also presented here. The final success probability of quantum multi-hop teleportation in wireless mesh backbone networks was simulated and analyzed. Our research shows that quantum multi-hop teleportation in wireless mesh backbone networks through a partially entangled GHZ state is feasible.Keywords: wireless mesh backbone network, multi-hop teleportation, partially entangled GHZ state, quantum routing protocol PACS: 03.67.Hk, 03.65.Ud IntroductionQuantum communication technology is a popular subject of research in the field of quantum information [1][2][3][4][5]. There are two methods to transmit quantum information between nodes. One involves the direct transfer of quantum states, whereas the other facilitates the indirect transfer of such states through quantum teleportation. Considering that qubits are sensitive to the environment and, hence, that some loss of information can occur, when quantum information needs to be transferred between two