Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Ludovico Lami"'
Autor:
Bartosz Regula, Ludovico Lami
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-7 (2024)
Abstract Among the most fundamental questions in the manipulation of quantum resources such as entanglement is the possibility of reversibly transforming all resource states. The key consequence of this would be the identification of a unique entropi
Externí odkaz:
https://doaj.org/article/4907e1225d384088b3f9c5c89b299032
Publikováno v:
Quantum, Vol 7, p 1157 (2023)
When two particles interact primarily through gravity and follow the laws of quantum mechanics, the generation of entanglement is considered a hallmark of the quantum nature of the gravitational interaction. However, we demonstrate that entanglement
Externí odkaz:
https://doaj.org/article/ea3e428f839345119b5139db7e418849
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033153 (2023)
We establish fundamental upper bounds on the amount of secret key that can be extracted from quantum Gaussian states by using local Gaussian operations, local classical processing, and public communication. For one-way public communication or when tw
Externí odkaz:
https://doaj.org/article/218142f3912e4459b4f4317062a20a9e
Autor:
Mario Berta, Fernando G. S. L. Brandão, Gilad Gour, Ludovico Lami, Martin B. Plenio, Bartosz Regula, Marco Tomamichel
Publikováno v:
Quantum, Vol 7, p 1103 (2023)
We show that the proof of the generalised quantum Stein's lemma [Brandão & Plenio, Commun. Math. Phys. 295, 791 (2010)] is not correct due to a gap in the argument leading to Lemma III.9. Hence, the main achievability result of Brandão & Plenio is
Externí odkaz:
https://doaj.org/article/7c9e4036238b4968888cc6931cc48ca5
Publikováno v:
Quantum, Vol 6, p 743 (2022)
We study the problem of estimating the temperature of Gaussian systems with feasible measurements, namely Gaussian and photo-detection-like measurements. For Gaussian measurements, we develop a general method to identify the optimal measurement numer
Externí odkaz:
https://doaj.org/article/b7cefb5f810a4186934f221fe35ca898
Autor:
Martin Ringbauer, Thomas R. Bromley, Marco Cianciaruso, Ludovico Lami, W. Y. Sarah Lau, Gerardo Adesso, Andrew G. White, Alessandro Fedrizzi, Marco Piani
Publikováno v:
Physical Review X, Vol 8, Iss 4, p 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:
https://doaj.org/article/da37bdb3e4eb490e990e7c67c9a13124
Publikováno v:
New Journal of Physics, Vol 20, Iss 2, p 023030 (2018)
We present a novel approach to the separability problem for Gaussian quantum states of bosonic continuous variable systems. We derive a simplified necessary and sufficient separability criterion for arbitrary Gaussian states of m versus n modes, whic
Externí odkaz:
https://doaj.org/article/5b61a87158284da0918e589b231bec77
Publikováno v:
New Journal of Physics, Vol 20, Iss 11, p 113012 (2018)
We compare two sets of multimode quantum channels acting on a finite collection of harmonic oscillators: (a) the set of linear bosonic channels, whose action is described as a linear transformation at the phase space level; and (b) Gaussian dilatable
Externí odkaz:
https://doaj.org/article/0705fa3646e24fd99d966e822fb59e82
Publikováno v:
Communications in Mathematical Physics. 398:291-351
We study asymptotic state transformations in continuous variable quantum resource theories. In particular, we prove that monotones displaying lower semicontinuity and strong superadditivity can be used to bound asymptotic transformation rates in thes
Autor:
Ludovico Lami, Maksim E. Shirokov
Publikováno v:
Annales Henri Poincaré.
The relative entropy of entanglement $E_R$ is defined as the distance of a multi-partite quantum state from the set of separable states as measured by the quantum relative entropy. We show that this optimisation is always achieved, i.e. any state adm