Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound
Recent Advances on Quantum Key Distribution Overcoming the Linear Secret Key Capacity Bound
Abstract A crucial goal for quantum key distribution (QKD) is to transmit unconditionally secure keys over long distances. Previous studies show that the key rate of point‐to‐point QKD is limited by a secret key rate capacity bound, and higher key rates would require quantum repeaters. In 2018, the seminal twin‐field …