Restoring Quantum Communication Efficiency over High Loss Optical Fibers
Restoring Quantum Communication Efficiency over High Loss Optical Fibers
In the absence of quantum repeaters, quantum communication proved to be nearly impossible across optical fibers longer than ≳20 km due to the drop of transmissivity below the critical threshold of 1/2. However, if the signals fed into the fiber are separated by a sufficiently short time interval, memory effects …