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quant-ph2020
Quantum capacity analysis of multi-level amplitude damping channels
Stefano Chessa, Vittorio Giovannetti
The set of Multi-level Amplitude Damping (MAD) quantum channels is introduced as a generalization of the standard qubit Amplitude Damping Channel to quantum systems of finite dimen…
quant-ph2019
Quantum-capacity bounds in spin-network communication channels
Stefano Chessa, Marco Fanizza, Vittorio Giovannetti
Using the Lieb-Robinson inequality and the continuity property of the quantum capacities in terms of the diamond norm, we derive an upper bound on the values that these capacities…
quant-ph2019
Time-Polynomial Lieb-Robinson bounds for finite-range spin-network models
Stefano Chessa, Vittorio Giovannetti
The Lieb-Robinson bound sets a theoretical upper limit on the speed at which information can propagate in non-relativistic quantum spin networks. In its original version, it result…