Quantum capacity

What is the squashed entanglement \(E_{\mathrm{sq}}(\Lambda_p)\) of the qubit depolarizing channel, defined for a mixing parameter \(p\in[0,1]\) by

• Quantum Resource Theory
• Quantum Communication
• Entanglement measures
• Quantum capacity
• Private capacity

Is the ordinary unassisted quantum capacity a computable function of a finite description of a finite-dimensional quantum channel?

• Quantum Communication
• Quantum algorithm
• Quantum capacity
• Computational complexity and computability

What is the unconstrained, unassisted quantum capacity of the single-mode Gaussian random-displacement channel?

• Quantum Communication
• Quantum capacity
• Bosonic channels

Does every finite-dimensional transpose-degradable channel satisfy an exponential strong converse for quantum communication at its single-letter quantum capacity?

• Quantum Communication
• Quantum capacity
• Channel degradability
• Strong converses

For \(0<\eta<1\) and \(0<\nu<\infty\), let the single-mode bosonic thermal attenuator be

• Quantum Communication
• Quantum capacity
• Bosonic channels

What is the quantum capacity \(\mathcal{Q}(\Lambda_{\mathbf p})\) of the qubit Pauli channel defined by

• Quantum Communication
• Quantum capacity

Let \(\Phi_{\eta,\nu}\) be the single-mode bosonic thermal attenuator with transmissivity \(0<\eta<1\) and environmental mean photon number \(0<\nu<\infty\), defined by

• Quantum Communication
• Quantum capacity
• Bosonic channels

For \(0<\eta<1\) and \(0<\nu<\infty\), let the single-mode bosonic thermal attenuator be

• Quantum Communication
• Quantum capacity
• Bosonic channels

What is the two-way quantum capacity \(\mathcal{Q}_2(\mathcal A_p)\) of the qubit amplitude-damping channel

• Quantum Communication
• Quantum capacity
• Local operations and classical communication