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

Explicit qutrit channel with zero quantum and private capacities discovered—resolving two open problems about capacity vanishing mechanisms outside PPT and antidegradable classes.

#QuantumInformation #QuantumCapacity #Research

Researchers demonstrated noise cancellation by coherently superposing quantum channels using NMR, recovering quantum coherence and enabling quantum capacity in zero-capacity channels—a breakthrough for quantum communication systems.

#QuantumChannels #QuantumCapacity #Research