Quantum 9, 1599 (2025). https://doi.org/10.22331/q-2025-01-20-1599 Hardy’s argument constitutes an elegantly logical test for identifying nonlocal features of multipartite correlations. In this paper, we investigate Hardy’s nonlocal behavior within a broad class of operational theories, including […]
Quantum 9, 1598 (2025). https://doi.org/10.22331/q-2025-01-15-1598 In a Generalised Probabilistic Theory (GPT) equipped additionally with some extra geometric structure we define the morphophoric measurements as those for which the measurement map sending states to distributions of […]
Quantum 9, 1597 (2025). https://doi.org/10.22331/q-2025-01-15-1597 In this work, we consider a fundamental task in quantum many-body physics – finding and learning ground states of quantum Hamiltonians and their properties. Recent works have studied the task […]
Quantum 9, 1596 (2025). https://doi.org/10.22331/q-2025-01-15-1596 Distributed quantum sensing enables the estimation of multiple parameters encoded in spatially separated probes. While traditional quantum sensing is often focused on estimating a single parameter with maximum precision, distributed […]
Quantum 9, 1595 (2025). https://doi.org/10.22331/q-2025-01-15-1595 We improve the test to show the impossibility of a quantum theory based on real numbers by a larger ratio of complex-to-real bound on a Bell-type parameter. In contrast to […]
Quantum 9, 1594 (2025). https://doi.org/10.22331/q-2025-01-15-1594 Quantum optimization methods use a continuous degree-of-freedom of quantum states to heuristically solve combinatorial problems, such as the MAX-CUT problem, which can be attributed to various NP-hard combinatorial problems. This […]
Quantum 9, 1593 (2025). https://doi.org/10.22331/q-2025-01-14-1593 Quantum-inspired classical algorithms provide us with a new way to understand the computational power of quantum computers for practically-relevant problems, especially in machine learning. In the past several years, numerous […]
Quantum 9, 1592 (2025). https://doi.org/10.22331/q-2025-01-14-1592 Adrian Kent has recently presented a critique [1] of our paper [2] in which he claims to refute our main result: the measurement postulates of quantum mechanics can be derived […]
Quantum 9, 1591 (2025). https://doi.org/10.22331/q-2025-01-14-1591 Correlations in Einstein-Podolsky-Rosen (EPR) scenarios, captured by $assemblages$ of unnormalised quantum states, have recently caught the attention of the community, both from a foundational and an information-theoretic perspective. The set […]
Quantum 9, 1590 (2025). https://doi.org/10.22331/q-2025-01-14-1590 We propose a state preparation protocol based on sequential measurements of a central spin coupled with a spin ensemble, and investigate the usefulness of the generated multi-spin states for quantum […]
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