Zobrazeno 1 - 10
of 346
pro vyhledávání: '"Acin, Antonio"'
Quantum measurements affect the state of the observed systems via back-action. While projective measurements extract maximal classical information, they drastically alter the system. In contrast, weak measurements balance information extraction with
Externí odkaz:
http://arxiv.org/abs/2411.03979
Autor:
Mortimer, Luke, Farina, Donato, Di Bello, Grazia, Jansen, David, Leitherer, Andreas, Mujal, Pere, Acín, Antonio
Estimating steady state properties of open quantum systems is a crucial problem in quantum technology. In this work, we show how to derive in a scalable way using semi-definite programming certified bounds on the expectation value of an arbitrary obs
Externí odkaz:
http://arxiv.org/abs/2410.13646
Autor:
Steffinlongo, Anna, Navarro, Mariana, Cenni, Marina, Valcarce, Xavier, Acín, Antonio, Oudot, Enky
Device-independent quantum key distribution (DIQKD) provides the strongest form of quantum security, as it allows two honest users to establish secure communication channels even when using fully uncharacterized quantum devices. The security proof of
Externí odkaz:
http://arxiv.org/abs/2409.17075
Understanding and characterising quantum many-body dynamics remains a significant challenge due to both the exponential complexity required to represent quantum many-body Hamiltonians, and the need to accurately track states in time under the action
Externí odkaz:
http://arxiv.org/abs/2408.08639
Continuous variable quantum key distribution (CVQKD) with discrete modulation combines advantages of CVQKD, such as the implementability using readily available technologies, with advantages of discrete variable quantum key distribution, such as easi
Externí odkaz:
http://arxiv.org/abs/2407.03087
We introduce two methods for quantum process and detector tomography. In the quantum process tomography method, we develop an analytical procedure for projecting the linear inversion estimation of a quantum channel onto the set of completely positive
Externí odkaz:
http://arxiv.org/abs/2406.11646
We introduce a quantum-inspired algorithm for Graph Coloring Problems (GCPs) that utilizes qudits in a product state, with each qudit representing a node in the graph and parameterized by d-dimensional spherical coordinates. We propose and benchmark
Externí odkaz:
http://arxiv.org/abs/2406.00792
Autor:
Macarone-Palmieri, Adriano, Zambrano, Leonardo, Lewenstein, Maciej, Acin, Antonio, Farina, Donato
Quantum compressed sensing is the fundamental tool for low-rank density matrix tomographic reconstruction in the informationally incomplete case. We examine situations where the acquired information is not enough to allow one to obtain a precise comp
Externí odkaz:
http://arxiv.org/abs/2405.10052
We analyze Bell inequalities violations in photonic experiments for which the measurement apparatuses are restricted to homodyne measurements. Through numerical optimization of the Clauser-Horne-Shimony-Holt inequality over homodyne measurements and
Externí odkaz:
http://arxiv.org/abs/2402.01530
Device-Independent Quantum Key Distribution (DIQKD) aims to generate secret keys between two parties without relying on trust in their employed devices, imposing strict noise constraints for key generation. This study explores the resilience of high-
Externí odkaz:
http://arxiv.org/abs/2402.00161