Quantum gate-assisted teleportation in noisy environments:robustness and fidelity improvement
作者机构：Department of AutomationUniversity of Science and Technology of ChinaHefei 230027China
出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)
年 卷 期：2024年第76卷第1期
页 面：36-48页
核心收录：
学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China under grant no.61973290 Ministry of Science and Technology of P.R.China Program under the grant no.QN2022200007L
主 题：quantum communication quantum teleportation decoherence control quantum gate environment-assisted measurement
摘 要：Quantum teleportation as the key strategy for quantum communication requires pure maximally shared entangled states among quantum *** practice,quantum decoherence drastically degrades the shared entanglement during entanglement distribution,which is a serious challenge for the development of quantum ***,most of the decoherence control strategies proposed thus far are either resource-intensive or *** overcome this obstacle,we enable noise-resistant teleportation through a noisy channel with a limited number of qubits and without applying time-consuming weak *** apply a quantum gate control unit consisting of a controlled NOT gate and a rotation gate after the original teleportation protocol is ***,we demonstrate that a teleportation fidelity of unity is attainable when environment-assisted measurement is added to the proposed teleportation protocol via quantum ***,we present an entanglement distribution process by employing the designed quantum gate control unit followed by the deterministic standard teleportation protocol to improve teleportation fidelity by establishing improved shared *** performance analysis indicates that the proposed teleportation schemes offer a competitive fidelity and success probability compared with the conventional schemes and a recent weak measurement-based teleportation protocol.
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