CAJ | 학술논문

王和闫设计出利用两步方法确定性地实现远程制备单粒子态,受到这个思想的启发,研究了任意形式双粒子态的远程制备.在此方案中,两个非最大纠缠GHZ态用作量子通道,制备者Alice将已知态的全部信息分割为两部分,一部分为实系数部分,另一部分为相因子部分.制备者Alice执行两次投影测量并将测量结果用4比特经典信息告诉Bob,远方接收者Bob可以通过合适的幺正变换以概率4|βγ|2成功地获得目标态,此成功概率比刘的方案高,这也是本方案的优点所在,因为在刘的方案中只有二粒子实系数态或赤道态的远程制备才能达到这个概率值.
왕화염설계출이용량보방법학정성지실현원정제비단입자태,수도저개사상적계발,연구료임의형식쌍입자태적원정제비.재차방안중,량개비최대규전GHZ태용작양자통도,제비자Alice장이지태적전부신식분할위량부분,일부분위실계수부분,령일부분위상인자부분.제비자Alice집행량차투영측량병장측량결과용4비특경전신식고소Bob,원방접수자Bob가이통과합괄적요정변환이개솔4|βγ|2성공지획득목표태,차성공개솔비류적방안고,저야시본방안적우점소재,인위재류적방안중지유이입자실계수태혹적도태적원정제비재능체도저개개솔치.
Inspired by the idea of Wang and Yan's,i.e.,a two-step exact remote state preparation (RSP) of an arbitrary qubit,the remote preparation of arbitrary two-qubit state was studied.In the scheme,two non-maximally entangled GHZ states act as quantum channels.The sender Alice divides the full information encoded in known state into two parts,one purely real coefficient and the other purely real phase factor.After twice projective measurements and the transmission of 4-bit classical information by Alice,the remote receiver Bob can obtain the desired state with the success probability 4|βγ|2 which is higher than that in Liu's protocol and it is also the advantage of our scheme,because only two-qubit state in real Hilbert space or equatorial-like state can reach this success probability value in Liu's protocol.