Quantum 10, 2078 (2026). https://doi.org/10.22331/q-2026-04-21-2078 We discuss the estimation of the distance of a given mixed many-body quantum state to the set of fully separable states, applied to the concrete scenario of collective spin states. […]
Quantum 10, 2077 (2026). https://doi.org/10.22331/q-2026-04-21-2077 In this work we present a hierarchy of generalized contextuality. It refines the traditional binary distinction between contextual and noncontextual theories, and facilitates their comparison based on how contextual they […]
Quantum 10, 2076 (2026). https://doi.org/10.22331/q-2026-04-21-2076 Many practically important NP-hard optimization problems are inherently higher-order polynomial optimizations, which are typically addressed using approximation algorithms. Classical relaxations express polynomial objectives over a polynomial basis and solve the […]
Quantum 10, 2075 (2026). https://doi.org/10.22331/q-2026-04-21-2075 In this paper, we investigate three schemes for implementing Controlled-Z (CZ) gates between individual ytterbium (Yb) rare-earth ions doped into yttrium orthovanadate (YVO$_4$ or YVO). Specifically, we investigate the CZ […]
Quantum 10, 2074 (2026). https://doi.org/10.22331/q-2026-04-20-2074 The Poincaré recurrence theorem shows that conservative systems in a bounded region of phase space eventually return arbitrarily close to their initial state after a finite amount of time. An […]
Quantum 10, 2073 (2026). https://doi.org/10.22331/q-2026-04-16-2073 We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations and appropriate gauge fixings […]
Quantum 10, 2072 (2026). https://doi.org/10.22331/q-2026-04-16-2072 Many alternative approaches to construct quantum channels with large entangling capacity were proposed in the past decade, resulting in multiple isolated gates. In this work, we put forward a novel […]
Quantum 10, 2071 (2026). https://doi.org/10.22331/q-2026-04-16-2071 As quantum computing moves toward fault-tolerant architectures, quantum error correction (QEC) decoder performance is increasingly critical for scalability. Understanding the impact of transitioning from floating-point software to finite-precision hardware is […]
Quantum 10, 2070 (2026). https://doi.org/10.22331/q-2026-04-16-2070 Friction in atomistic systems is usually described by the classical Prandtl-Tomlinson model suitable for capturing the dragging force of a nanoparticle in a periodic potential. Here we consider the quantum […]
Quantum 10, 2069 (2026). https://doi.org/10.22331/q-2026-04-15-2069 Magic-state resource theory is a fundamental framework with far-reaching applications in quantum error correction and the classical simulation of quantum systems. Recent advances have significantly deepened our understanding of magic […]
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