Improvement of two-way continuous variable quantum cryptography by using additional noise

作者：Wang MinJie^*; Pan Wei

来源：Physics Letters A, 2010, 374(24): 2434-2437.

DOI：10.1016/j.physleta.2010.04.006

• Quantum key distribution
• Coherent state
• Thermal noise
• Homodyne measurement

The performance of quantum key distribution such as one-way continuous variable protocols, can be increased by adding some noise on the reference side of error correction in the error-correction phase. For this reason, we here study this possibility in the case of two-way continuous variable system. Finally, the numerical results show that the using of additional noise gives two-way schemes better security performance in terms of secret key rates and resistance to channel excess noise.

• 出版日期2010-5-17
• 单位西南交通大学