Establishing a High-Fidelity Quantum Communication Channel Among Remote Three Parties
Quantum communication is a kind quantum mechanics applying microscopic material properties to communication technology.It has significant advantages in high-speed transmission and highly reliable secure communication,and has become one of the research hotspots in the field of communication technology currently.It is central to the quantum communication system how to establish a stable,reliable and secure quantum channel.The scheme is based on the weak cross Kerr nonlinear quantum non-destructive(QND)photon number analytical detection and cross-phase modulation(XPM)technology,linear optical elements and single bit rotation operation,this scheme can remotely prepare the three-particle Greenberger-Home-Zeilinger(GHZ)state in high fidelity,so as to realize the quantum communication channel among the three remote parties.The current scheme finally produces GHZ states remotely with a total success rate of approximately 1 and a fidelity of approximately unit in principle.Therefore,the GHZ pure state.with high fidelity is ob-tained at the expense of the probability of success.The scheme uses only a small number of basic linear optics,requires only the intro-duction of weak cross-Kerr nonlinearities,and does not require the addition of additional auxiliary photons to obtain high-fidelity GHZ pure states.It has been confirmed that in actual application this scheme has the significant advantages of ease,realizability and higher re-source utilization.
quantum communicationentangled statecross-phase modulationGHZ states
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