Speaker
Dr.
Salvatore Tirone
(Scuola Normale Superiore)
Description
We study the possibility of conveying useful energy (work) along a transmission line that allows for a partial preservation of quantum coherence. As a figure of merit we adopt the maximum values that ergotropy, total ergotropy, and non-equilibrium free-energy attain at the output of the line for an assigned input energy threshold. When the system can be modelled in terms of Phase-Invariant Bosonic Gaussian Channels (BGCs), we show that coherent inputs are optimal. For generic BGCs which are not Phase-Invariant the problem becomes more complex and coherent inputs are no longer optimal. In this case, focusing on one-mode channels, we solve the optimization problem under the extra restriction of Gaussian input signals.
Primary authors
Dr.
Salvatore Tirone
(Scuola Normale Superiore)
Dr.
Raffaele Salvia
(Scuola Normale Superiore)
Prof.
Vittorio Giovannetti
(Scuola Normale Superiore, NEST, CNR sez. PIsa)
