Optical transmission of frequency-coded quantum bits with WDM synchronization

T. F. D. Silva, J. P. Weid
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引用次数: 3

Abstract

Quantum key distribution enables absolutely secure communication between two parties, making them able to share a secret that will be used in the posterior message encryption. Here we shall report the experimental implementation of an optical qubits transmission system compatible with BB84-based protocols. The photonic qubits preparation and measurement are performed by a double-modulation process according with the relative phase of a WDM carried synchronized radiofrequency signal, in the way that the quantum states are coded in the optical sidebands. A filtering scheme is applied to the further sidebands selection, delivering the qubits to single-photon detectors.
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WDM同步下频率编码量子比特的光传输
量子密钥分发使双方之间的通信绝对安全,使他们能够共享一个将用于后验消息加密的秘密。在这里,我们将报告与基于bb84协议兼容的光量子比特传输系统的实验实现。光子量子比特的制备和测量采用双调制过程,按照WDM携带的同步射频信号的相对相位进行,量子态在光学边带中编码。在进一步的边带选择中应用滤波方案,将量子比特传送到单光子探测器。
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