Zobrazeno 1 - 10
of 151
pro vyhledávání: '"Piani, Marco"'
Autor:
Kraft, Tristan, Piani, Marco
Quantum coherence plays an important role in quantum information protocols that provide an advantage over classical information processing. The amount of coherence that can exist between two orthogonal subspaces is limited by the positivity constrain
Externí odkaz:
http://arxiv.org/abs/1911.10026
Autor:
Winczewski, Marek, Das, Tamoghna, Selby, John H., Horodecki, Karol, Horodecki, Paweł, Pankowski, Łukasz, Piani, Marco, Ramanathan, Ravishankar
Publikováno v:
Quantum 7, 1159 (2023)
Deriving quantum mechanics from information-theoretic postulates is a recent research direction taken, in part, with the view of finding a beyond-quantum theory; once the postulates are clear, we can consider modifications to them. A key postulate is
Externí odkaz:
http://arxiv.org/abs/1810.02222
Publikováno v:
Phys. Rev. B 99, 235115 (2019)
The fact that the computational cost of simulating a many-body quantum system on a computer increases with the amount of entanglement has been considered as the major bottleneck for simulating its out-of-equilibrium dynamics. Some aspects of the dyna
Externí odkaz:
http://arxiv.org/abs/1810.01231
Publikováno v:
Phys. Rev. Lett. 122, 140404 (2019)
We show that every entangled state provides an advantage in bi- and multi-channel discrimination that singles out its degree of entanglement, quantified in terms of its Schmidt number and of the corresponding robustness measures.
Comment: 7 page
Comment: 7 page
Externí odkaz:
http://arxiv.org/abs/1809.02082
Autor:
Caiaffa, Matteo, Piani, Marco
Standard quantum process tomography on a $d$-dimensional input is performed by preparing several states of an input probe that then evolve under the action of the quantum channel corresponding to the progress. The final states of the probe are recons
Externí odkaz:
http://arxiv.org/abs/1808.10835
Publikováno v:
Phys. Rev. Lett. 121, 160401 (2018)
Quantum Darwinism posits that information becomes objective whenever multiple observers indirectly probe a quantum system by each measuring a fraction of the environment. It was recently shown that objectivity of observables emerges generically from
Externí odkaz:
http://arxiv.org/abs/1802.05719
Autor:
Kraft, Tristan, Piani, Marco
We introduce a notion of genuine distributed coherence. Such a notion is based on the possibility of concentrating on individual systems the coherence present in a distributed system, by making use of incoherent unitary transformations. We define an
Externí odkaz:
http://arxiv.org/abs/1801.03919
Autor:
Sindici, Enrico, Piani, Marco
Publikováno v:
Phys. Rev. A 97, 032319 (2018)
We provide a simple construction of bipartite entangled states that are positive under partial transposition, and hence undistillable. The construction makes use of the properties of the projectors onto the symmetric and antisymmetric subspaces of th
Externí odkaz:
http://arxiv.org/abs/1708.06595
Autor:
Ringbauer, Martin, Bromley, Thomas R., Cianciaruso, Marco, Lami, Ludovico, Lau, W. Y. Sarah, Adesso, Gerardo, White, Andrew G., Fedrizzi, Alessandro, Piani, Marco
Publikováno v:
Phys. Rev. X 8, 041007 (2018)
Quantum coherence, present whenever a quantum system exists in a superposition of multiple classically distinct states, marks one of the fundamental departures from classical physics. Quantum coherence has recently been investigated rigorously within
Externí odkaz:
http://arxiv.org/abs/1707.05282
Autor:
Regula, Bartosz, Piani, Marco, Cianciaruso, Marco, Bromley, Thomas R., Streltsov, Alexander, Adesso, Gerardo
Publikováno v:
New J. Phys. 20, 033012 (2018)
Characterizing genuine quantum resources and determining operational rules for their manipulation are crucial steps to appraise possibilities and limitations of quantum technologies. Two such key resources are nonclassicality, manifested as quantum s
Externí odkaz:
http://arxiv.org/abs/1704.04153