On feedback and the classical capacity of a noisy quantum channel
Garry Bowen, Rajagopal Nagarajan
Abstract
Garry Bowen, Rajagopal Nagarajan
Abstract
In Shannon information theory the capacity of a memoryless communication channel cannot be increased by the use of feedback. The use of classical feedback is shown to provide no increase in the classical capacity of a memoryless quantum channel when feedback is used across nonentangled input states, or when the channel is an entanglement-breaking channel
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In Shannon information theory the capacity of a memoryless communication channel cannot be increased by the use of feedback. The use of classical feedback is shown to provide no increase in the classical capacity of a memoryless quantum channel when feedback is used across nonentangled input states, or when the channel is an entanglement-breaking channel
Key concepts: Classical capacity, Channel capacity, Channel (broadcasting), Quantum entanglement, Quantum channel, Amplitude damping channel, Quantum, Quantum capacity