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Universal locality of quantum thermal susceptibility
Giacomo De Palma, Antonella De Pasquale, Vittorio Giovannetti
The ultimate precision of any measurement of the temperature of a quantum system is the inverse of the local quantum thermal susceptibility [De Pasquale et al., Nature Communicatio…
Gaussian states minimize the output entropy of one-mode quantum Gaussian channels
Giacomo De Palma, Dario Trevisan, Vittorio Giovannetti
We prove the longstanding conjecture stating that Gaussian thermal input states minimize the output von Neumann entropy of one-mode phase-covariant quantum Gaussian channels among…
Multi-Phase Hadamard receivers for classical communication on lossy bosonic channels
Matteo Rosati, Andrea Mari, Vittorio Giovannetti
A scheme for transferring classical information over a lossy bosonic channel is proposed by generalizing the proposal presented in Phys. Rev. Lett. 106, 240502 (2011) by Guha. It e…
Gaussian States Minimize the Output Entropy of the One-Mode Quantum Attenuator
Giacomo De Palma, Dario Trevisan, Vittorio Giovannetti
We prove that Gaussian thermal input states minimize the output von Neumann entropy of the one-mode Gaussian quantum-limited attenuator for fixed input entropy. The Gaussian quantu…
Optimal processes for probabilistic work extraction beyond the second law
Vasco Cavina, Andrea Mari, Vittorio Giovannetti
According to the second law of thermodynamics, for every transformation performed on a system which is in contact with an environment of fixed temperature, the extracted work is bo…
Cut-and-paste restoration of entanglement transmission
Alvaro Cuevas, Andrea Mari, Antonella De Pasquale +5
The distribution of entangled quantum systems among two or more nodes of a network is a key task at the basis of quantum communication, quantum computation and quantum cryptography…
Passive states as optimal inputs for single-jump lossy quantum channels
Giacomo De Palma, Andrea Mari, Seth Lloyd +1
The passive states of a quantum system minimize the average energy among all the states with a given spectrum. We prove that passive states are the optimal inputs of single-jump lo…
Coherent-state discrimination via non-heralded probabilistic amplification
Matteo Rosati, Andrea Mari, Vittorio Giovannetti
A scheme for the detection of low-intensity optical coherent signals was studied which uses a probabilistic amplifier operated in the non-heralded version, as the underlying non-li…
Universal Control Induced by Noise
Christian Arenz, Daniel Burgarth, Paolo Facchi +4
On the basis of the quantum Zeno effect it has been recently shown [D. K. Burgarth et al., Nat. Commun. 5, 5173 (2014)] that a strong amplitude damping process applied locally on a…