Quantum 10, 2198 (2026). https://doi.org/10.22331/q-2026-09-01-2198 In this review article we summarize all experiments claiming quantum computational advantage to date. Our review highlights challenges, loopholes, and refutations appearing in subsequent work to provide a complete picture […]
Quantum 10, 2197 (2026). https://doi.org/10.22331/q-2026-08-27-2197 Atomic scale qubits, as may be realized in nitrogen vacancy (NV) centers in diamond, offer the opportunity to study magnetic field noise with nanometer scale spatial resolution. Using these spin […]
Quantum 10, 2196 (2026). https://doi.org/10.22331/q-2026-08-20-2196 The framework of internal quantum reference frames (QRFs) constitutes a universal toolset for dealing with symmetries in quantum theory and has led to new revelations in quantum gravity, gauge theories […]
Quantum 10, 2195 (2026). https://doi.org/10.22331/q-2026-08-19-2195 There have been significant recent advances in constructing theoretical and practical quantum error correcting codes that function well as quantum memories; however, performing fault-tolerant logical gates on these codes is […]
Quantum 10, 2194 (2026). https://doi.org/10.22331/q-2026-08-19-2194 Entanglement plays a crucial role in quantum information science and many-body physics, yet quantifying it in mixed quantum many-body systems has remained a notoriously difficult problem. Here, we introduce families […]
Quantum 10, 2193 (2026). https://doi.org/10.22331/q-2026-08-19-2193 Quantum phase estimation is an important routine in many quantum algorithms, particularly for estimating the ground state energy in quantum chemistry simulations. This estimation involves applying powers of a unitary […]
Quantum 10, 2192 (2026). https://doi.org/10.22331/q-2026-08-13-2192 We present a comprehensive and pedagogical formulation of Bayesian multiparameter quantum estimation. Within this framework, we analyse the role of measurement incompatibility and establish its quantitative effect on attainable precision. […]
Quantum 10, 2191 (2026). https://doi.org/10.22331/q-2026-08-13-2191 We show that the $T$-depth of any single-qubit $z$-rotation can be reduced to $3$ if a certain catalyst state is available. To achieve an $epsilon$-approximation, it suffices to have a […]
Quantum 10, 2190 (2026). https://doi.org/10.22331/q-2026-08-13-2190 We develop a theoretical framework for fast, robust and high-fidelity topological quantum state transfer in one-dimensional systems with long-range couplings, motivated by chains of Rydberg atoms with dipole–dipole interactions. Such […]
Quantum 10, 2190 (2026). https://doi.org/10.22331/q-2026-08-13-2190 We develop a theoretical framework for fast, robust and high-fidelity topological quantum state transfer in one-dimensional systems with long-range couplings, motivated by chains of Rydberg atoms with dipole–dipole interactions. Such […]
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