For quantum information, two wrongs can make a right

Abstract

Superactivation is the phenomenon where two quantum channels which individually have zero-capacity can have positive capacity when used together. The perspective given here provides an intuitive explanation of this discovery by Smith and Yard, and gives a protocol to activate any private channel.

References in corpus (5)

• Quantum Communication With Zero-Capacity Channels
• Secure key from bound entanglement
• Hiding classical data in multi-partite quantum states
• The quantum capacity with symmetric side channels
• Unconditional privacy over channels which cannot convey quantum information

Cited by in corpus (12)

• A Survey on Quantum Channel Capacities
• Unbounded number of channel uses are required to see quantum capacity
• The private capacity of quantum channels is not additive
• Superactivation of the Asymptotic Zero-Error Classical Capacity of a Quantum Channel
• When does noise increase the quantum capacity?
• Generic nonadditivity of quantum capacity in simple channels
• The platypus of the quantum channel zoo
• Classical-Quantum Arbitrarily Varying Wiretap Channel: Ahlswede dichotomy, Positivity, Resources, Super Activation
• Exploring super-additivity of coherent information of noisy quantum channels through Genetic algorithms
• Public Quantum Communication and Superactivation
• Low-dimensional quite noisy bound entanglement with cryptographic key
• Better transmission with lower capacity: lossy compression over quantum channels