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Energy-constrained two-way capacity bounds for noisy Gaussian channels
Stefano Pirandola
A gap between achievable rates and converse bounds persists for energy-constrained bosonic communication in the presence of excess noise. We derive a unified adaptive weak-converse…
Energy-constrained two-way capacities of pure-loss and quantum-limited amplifier channels
Stefano Pirandola
We determine the two-way quantum, entanglement-distribution, private, and secret-key capacities of the pure-loss bosonic channel under an unconditional mean transmitted-photon-numb…
Exact series formulas for the capacities of the amplitude damping channel
Stefano Pirandola
We derive explicit, absolutely convergent series formulas for the quantum, unassisted classical, and entanglement-assisted classical capacities of the qubit amplitude damping chann…
Improved lower bound for the two-way-assisted quantum capacity of the bosonic thermal-loss channel
Matthew Barber, Stefano Pirandola
The bosonic thermal-loss channel is a fundamental model for quantum communication. This Gaussian channel models the transmission of bosonic systems subject to both loss and thermal…
Heuristic Lookahead Distillation Protocol Search
Matthew Barber, Stefano Pirandola
Bipartite qubit entanglement distillation is the process of converting noisy ebits into pure ebits using only local operations and classical communication. This is a core operation…
Free-Space Quantum Networks and Optimized Fiber-Reinforcement
Alasdair I. Fletcher, Ignazio Pedone, Stefano Pirandola
Free-space quantum communication provides a flexible complement to fiber-based quantum networks, but its point-to-point capacity is fundamentally limited by diffraction, atmospheri…