Quantum Cryptography

What is the private classical capacity \(P(\Lambda_p)\) of the qubit depolarizing channel, defined for a mixing parameter \(p\in[0,1]\) by

• Quantum Communication
• Quantum Cryptography
• Private capacity
• Additivity and regularization

Does every finite-alphabet Bell-nonlocal behavior have a strictly positive asymptotic secret-key rate against arbitrary individual nonsignalling attacks?

• Quantum Cryptography
• Quantum Resource Theory
• Secret-key distillation
• Device-independent cryptography
• Bell nonlocality

Does an explicit total Boolean family require polynomial shared-state cost for bounded-error one-round \(f\)-routing?

• Quantum Communication
• Quantum Cryptography
• Quantum communication complexity
• Position-based quantum cryptography

Does every finite-dimensional entangled bipartite state have positive asymptotic distillable secret key?

• Quantum Cryptography
• Quantum Resource Theory
• Secret-key distillation
• Bound entanglement
• Local operations and classical communication

Can loss of one qubit held by an honest party reduce the two-way distillable secret key by an arbitrarily large amount?

• Quantum Cryptography
• Quantum Resource Theory
• Secret-key distillation
• Local operations and classical communication