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115 papers · 1 filter
Coherent regime of Kapitza-Dirac effect with electrons
Kamila Moriová, Petr Koutenský, Neli Laštovičková Streshkova +5
Electron matter waves coherently diffract when passing through a periodic structure of light formed by two interfering light waves. In this so-called Kapitza-Dirac effect, the elec…
Quantumness and its hierarchies in PT-symmetric down-conversion models
Jan Peřina, Karol Bartkiewicz, Grzegorz Chimczak +4
We investigate the hierarchy of quantum correlations in a quadratic bosonic parity-time-symmetric system (PTSS) featuring distinct dissipation and amplification channels. The hiera…
Conditional mutual information: A generalization of causal inference in quantum systems
Anupam Ghosh
The concept of causality is fundamental to numerous scientific explanations; however, its extension to the quantum regime has yet to be rigorously explored. This letter introduces…
A Non-Convex Optimization Strategy for Computing Convex-Roof Entanglement
Jimmie Adriazola, Katarzyna Roszak
We develop a numerical methodology for the computation of entanglement measures for mixed quantum states. Using the well-known Schrödinger-HJW theorem, the computation of convex ro…
Harnessing spin-qubit decoherence to probe strongly-interacting quantum systems
Marcin Płodzień, Sambunath Das, Maciej Lewenstein +2
Extracting information from quantum many-body systems remains a key challenge in quantum technologies due to experimental limitations. In this work, we employ a single spin qubit t…
Experimental relative entanglement potentials of single-photon states
Josef Kadlec, Karol Bartkiewicz, Antonín Černoch +2
Entanglement potentials (EPs) enable the characterization and quantification of the nonclassicality of single-mode optical fields by measuring the entanglement generated through be…