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 […]
Quantum 10, 2189 (2026). https://doi.org/10.22331/q-2026-08-13-2189 Graph states are central resources for quantum information processing, supporting applications in computation, communication, and error correction. In photonic systems, they are typically assembled from smaller entangled states using probabilistic […]
Quantum 10, 2189 (2026). https://doi.org/10.22331/q-2026-08-13-2189 Graph states are central resources for quantum information processing, supporting applications in computation, communication, and error correction. In photonic systems, they are typically assembled from smaller entangled states using probabilistic […]
Quantum 10, 2188 (2026). https://doi.org/10.22331/q-2026-08-12-2188 Recent work by Bravyi, Gosset, and Koenig showed that there exists a search problem that a constant-depth quantum circuit can solve, but that any constant-depth classical circuit with bounded fan-in […]
Quantum 10, 2187 (2026). https://doi.org/10.22331/q-2026-08-10-2187 Hamiltonian simulation is one of the most promising candidates for the demonstration of quantum advantage within the next ten years, and several studies have proposed end-to-end resource estimates for executing […]
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