Proves polynomial fidelity decay O(1/n) for codes exceeding capacity on pure-loss bosonic channels, establishing fundamental limits on quantum communication without energy constraints using quantum hypothesis testing methods.

#QuantumInformation #QuantumChannels #QuantumCapacity

Proves exponential decay of entanglement-transmission fidelity beyond quantum capacity for all finite-dimensional channels via quantum blowing-up lemma and polynomial projector approximations.

#QuantumInformationTheory #QuantumCommunication #QuantumCapacity