Multilevel quantum thermodynamic swap engines

Autor: Massimiliano F. Sacchi

We study energetic exchanges and fluctuations in two-stroke quantum thermodynamic engines where the working fluid is represented by two multilevel quantum systems, i.e. qudits, the heat flow is allowed by relaxation with two thermal reservoirs at dif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::461a04c3eb140699bffca011d4085df1
http://arxiv.org/abs/2106.15897

Experimental witnessing of the quantum channel capacity in the presence of correlated noise

Autor: Massimiliano F. Sacchi, Marco Barbieri, Chiara Macchiavello, Ilaria Gianani, Valeria Cimini

Publikováno v: Physical review, A Print 102 (2020): 052404-1–052404-7. doi:10.1103/PhysRevA.102.052404
info:cnr-pdr/source/autori:Cimini, V; Gianani, I; Sacchi, M. F.; Macchiavello, C.; Barbieri, M./titolo:Experimental witnessing of the quantum channel capacity in the presence of correlated noise/doi:10.1103%2FPhysRevA.102.052404/rivista:Physical review, A Print/anno:2020/pagina_da:052404-1/pagina_a:052404-7/intervallo_pagine:052404-1–052404-7/volume:102

We present an experimental method to detect lower bounds to the quantum capacity of two-qubit communication channels. We consider an implementation with polarization degrees of freedom of two photons and report on the efficiency of such a method in t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d51459479c8858581a56c807de4ecedf
http://arxiv.org/abs/2007.09983

Efficient Accessible Bounds to the Classical Capacity of Quantum Channels

Autor: Massimiliano F. Sacchi, Chiara Macchiavello

Publikováno v: Physical review letters
123 (2019). doi:10.1103/PhysRevLett.123.090503
info:cnr-pdr/source/autori:Macchiavello, Chiara; Sacchi, Massimiliano F./titolo:Efficient Accessible Bounds to the Classical Capacity of Quantum Channels/doi:10.1103%2FPhysRevLett.123.090503/rivista:Physical review letters (Print)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:123

We present a method to detect lower bounds to the classical capacity of quantum communication channels by means of few local measurements (i.e. without complete process tomography), reconstruction of sets of conditional probabilities, and classical o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e907c0ba82c3a26b97f73d4c0e0d0030
http://www.cnr.it/prodotto/i/412260

Mixed-state certification of quantum capacities for noisy communication channels

Autor: Chiara Macchiavello, Massimiliano F. Sacchi

Publikováno v: Physical review, A Print 97 (2018). doi:10.1103/PhysRevA.97.012303
info:cnr-pdr/source/autori:Macchiavello, Chiara; Sacchi, Massimiliano F./titolo:Mixed-state certification of quantum capacities for noisy communication channels/doi:10.1103%2FPhysRevA.97.012303/rivista:Physical review, A Print/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:97

We extend a recent method to detect lower bounds to the quantum capacity of quantum communication channels by considering realistic scenarios with general input probe states and arbitrary detection procedures at the output. Realistic certification re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7518327be12f032f35e558f1557902d
https://doi.org/10.1103/physreva.97.012303

Convex approximations of quantum channels

Autor: Tito Sacchi, Massimiliano F. Sacchi

Publikováno v: Physical review, A Print 96 (2017). doi:10.1103/PhysRevA.96.032311
info:cnr-pdr/source/autori:Sacchi, Massimiliano F.; Sacchi, Tito/titolo:Convex approximations of quantum channels/doi:10.1103%2FPhysRevA.96.032311/rivista:Physical review, A Print/anno:2017/pagina_da:/pagina_a:/intervallo_pagine:/volume:96

We address the problem of optimally approximating the action of a desired and unavailable quantum channel $\Phi $ having at our disposal a single use of a given set of other channels $\{\Psi_i \}$. The problem is recast to look for the least distingu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bef05931ebf67dea40cd2f1cbfd052c7