Quantum 10, 2130 (2026). https://doi.org/10.22331/q-2026-06-08-2130 We analyze the task of estimating a multi-parameter unitary belonging to the $SU(2)$ or $SU(1,1)$ groups, in a two-bosonic-mode scenario and investigate the scaling of the precision in terms of […]
Quantum 10, 2129 (2026). https://doi.org/10.22331/q-2026-06-08-2129 Recent work highlighted the importance of higher-order correlations in quantum dynamics for a deeper understanding of quantum chaos and thermalization. The full Eigenstate Thermalization Hypothesis, the framework encompassing correlations, can […]
Quantum 10, 2128 (2026). https://doi.org/10.22331/q-2026-06-08-2128 Entanglement witnesses (EWs) are a collection of observables that can characterize separable states and, experimentally, estimating EWs can verify entangled states. In this work, we show that a fixed measurement […]
Quantum 10, 2127 (2026). https://doi.org/10.22331/q-2026-06-08-2127 Classical shadows provide a versatile framework for estimating many properties of quantum states from repeated, randomly chosen measurements without requiring full quantum state tomography. When prior information is available, such […]
Quantum 10, 2126 (2026). https://doi.org/10.22331/q-2026-06-08-2126 The study of quantum reference frames has received renewed interest over the last years, leading to the parallel development of non-equivalent frameworks by different communities. We clarify the differences between […]
Quantum 10, 2125 (2026). https://doi.org/10.22331/q-2026-06-02-2125 We construct a local decoder for the 2D toric code using ideas from the hierarchical classical cellular automata of Tsirelson and Gács. Our decoder is a circuit of strictly local […]
Quantum 10, 2124 (2026). https://doi.org/10.22331/q-2026-06-01-2124 We present a new simulation-secure quantum oblivious transfer (QOT) protocol based on one-way functions in the plain model. With a focus on practical implementation, our protocol surpasses prior works in […]
Quantum 10, 2123 (2026). https://doi.org/10.22331/q-2026-06-01-2123 We investigate quantum cellular automata (QCA) on one-dimensional spin systems defined over a subalgebra of the full local operator algebra – the symmetric subalgebra under a finite Abelian group symmetry […]
Quantum 10, 2122 (2026). https://doi.org/10.22331/q-2026-06-01-2122 This paper explores the sensitivity gains afforded by spin-squeezed states in atom interferometry, in particular using Bragg diffraction. We introduce a generalised input-output formalism that accurately describes realistic, non-unitary interferometers, […]
Quantum 10, 2121 (2026). https://doi.org/10.22331/q-2026-05-29-2121 A rigorous characterization of the information content of any highest-spin three-fermion wave function is presented. It is based upon a formal decomposition of the wave function into a finite set […]
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