We present a novel protocol for deterministic secure quantum communication by using the four-qubit clusterstate as quantum channel.It is shown that two legitimate users can directly transmit the secret messages based ...We present a novel protocol for deterministic secure quantum communication by using the four-qubit clusterstate as quantum channel.It is shown that two legitimate users can directly transmit the secret messages based on Bell-basis measurements and classical communication.The present protocol makes use of the ideas of block transmission anddecoy particle checking technique.It has a high capacity as each cluster state can carry two bits of information,and hasa high intrinsic efficiency because almost all the instances except the decoy checking particles (its number is negligible)are useful.Furthermore,this protocol is feasible with present-day technique.展开更多
We propose a scheme for multiparty-controlled remote preparation of the two-particle state by usingtwo non-maximally Greenberger-Horne-Zeilinger states as quantum channel.Our scheme consists of one sender andn remote ...We propose a scheme for multiparty-controlled remote preparation of the two-particle state by usingtwo non-maximally Greenberger-Horne-Zeilinger states as quantum channel.Our scheme consists of one sender andn remote receivers.It will be shown that the sender can help either one of the n receivers to remotely preparationthe original state with the appropriate probability,and the sender Alice's two-particle projective measurement and thecontrollers' single-particle product measurements are needed.We also obtained the probability of the successful remotestate preparation.展开更多
We propose two schemes for quantum secure direct communication (QSDC) and deterministic securequantum communication (DSQC) over collective dephasing noisy channel.In our schemes,four special two-qubit statesare used a...We propose two schemes for quantum secure direct communication (QSDC) and deterministic securequantum communication (DSQC) over collective dephasing noisy channel.In our schemes,four special two-qubit statesare used as the quantum channel.Since these states are unchanged through the collective dephasing noisy channel,the effect of the channel noise can be perfectly overcome.Simultaneously,the security against some usual attacks canbe ensured by utilizing the various checking procedures.Furthermore,these two schemes are feasible with present-daytechnique.展开更多
We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using afour-qubit cluster-class state and a Bell state as a quantum channel With a quantum controlled phase gate (QCPG)operat...We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using afour-qubit cluster-class state and a Bell state as a quantum channel With a quantum controlled phase gate (QCPG)operation and a local unitary operation,any one of the two agents has the access to reconstruct the original state ifhe/she collaborates with the other one,whilst individual agent obtains no information.As all quantum resource canbe used to carry the useful information,the intrinsic efficiency of qubits approaches the maximal value.Moreover,thepresent scheme is more feasible with present-day technique.展开更多
基金supported by the Postgraduate Innovation Research Plan from Anhui University under Grant No.20073039
文摘We present a novel protocol for deterministic secure quantum communication by using the four-qubit clusterstate as quantum channel.It is shown that two legitimate users can directly transmit the secret messages based on Bell-basis measurements and classical communication.The present protocol makes use of the ideas of block transmission anddecoy particle checking technique.It has a high capacity as each cluster state can carry two bits of information,and hasa high intrinsic efficiency because almost all the instances except the decoy checking particles (its number is negligible)are useful.Furthermore,this protocol is feasible with present-day technique.
文摘We propose a scheme for multiparty-controlled remote preparation of the two-particle state by usingtwo non-maximally Greenberger-Horne-Zeilinger states as quantum channel.Our scheme consists of one sender andn remote receivers.It will be shown that the sender can help either one of the n receivers to remotely preparationthe original state with the appropriate probability,and the sender Alice's two-particle projective measurement and thecontrollers' single-particle product measurements are needed.We also obtained the probability of the successful remotestate preparation.
文摘We propose two schemes for quantum secure direct communication (QSDC) and deterministic securequantum communication (DSQC) over collective dephasing noisy channel.In our schemes,four special two-qubit statesare used as the quantum channel.Since these states are unchanged through the collective dephasing noisy channel,the effect of the channel noise can be perfectly overcome.Simultaneously,the security against some usual attacks canbe ensured by utilizing the various checking procedures.Furthermore,these two schemes are feasible with present-daytechnique.
基金Supported by the Natural Science Research Programme of the Education Department of Anhui Province under Grant Nos.KJ2009B039Z and KJ2009B018Zthe Municipal Level Research Project from Lu'an City directive entrusted to West AnHui University under Grant No.2008LW004
文摘We propose a scheme for sharing an arbitrary unknown two-qubit state among three parties by using afour-qubit cluster-class state and a Bell state as a quantum channel With a quantum controlled phase gate (QCPG)operation and a local unitary operation,any one of the two agents has the access to reconstruct the original state ifhe/she collaborates with the other one,whilst individual agent obtains no information.As all quantum resource canbe used to carry the useful information,the intrinsic efficiency of qubits approaches the maximal value.Moreover,thepresent scheme is more feasible with present-day technique.
