论文标题
噪声二进制量子信息协议中的纠缠恢复通过三量量子误差校正代码
Entanglement recovery in noisy binary quantum information protocols via three-qubit quantum error correction codes
论文作者
论文摘要
保护噪声的纠缠的任务对于量子通信和量子信息传输至关重要。为此，可以使用量子误差校正（QEC）代码来补偿，至少部分地是由环境噪声引起的损害，这些损失可以模拟为位叉或相叉误差通道。在本文中，我们调查了简单的三量QEC代码在双Quity系统中恢复纠缠和非锁定性的影响，并考虑两个实际应用：超密集的编码和量子传送。尽管已知所考虑的三量QEC代码在存在很小的噪声的情况下可以完美地工作，但我们表明它们可以避免纠缠突然死亡，并提高解决方案的性能，也可以用于更大的噪声幅度。
The task of preserving entanglement against noises is of crucial importance for both quantum communication and quantum information transfer. To this aim, quantum error correction (QEC) codes may be employed to compensate, at least partially, the detriments induced by environmental noise that can be modelled as a bit-flip or a phase-flip error channel. In this paper we investigate the effects of the simple three-qubit QEC codes to restore entanglement and nonlocality in a two-qubit system and consider two practical applications: superdense coding and quantum teleportation. Though the considered three-qubit QEC codes are known to perfectly work in the presence of very small noise, we show that they can avoid the sudden death of entanglement and improve the performance of the addressed protocols also for larger noise amplitudes.
