Quantum 9, 1801 (2025). https://doi.org/10.22331/q-2025-07-21-1801 Nonstabilizerness or `magic’ is a key resource for quantum computing and a necessary condition for quantum advantage. Non-Clifford operations turn stabilizer states into resourceful states, where the amount of nonstabilizerness […]
Quantum 9, 1800 (2025). https://doi.org/10.22331/q-2025-07-21-1800 Fault-tolerant quantum computation (FTQC) is essential to implement quantum algorithms in a noise-resilient way, and thus to enjoy advantages of quantum computers even with presence of noise. In FTQC, a […]
Quantum 9, 1799 (2025). https://doi.org/10.22331/q-2025-07-21-1799 Quantum computers are expected to enable fast solving of large-scale combinatorial optimization problems. However, their limitations in fidelity and the number of qubits prevent them from handling real-world problems. Recently, […]
Quantum 9, 1798 (2025). https://doi.org/10.22331/q-2025-07-21-1798 The Quantum Fisher Information Matrix (QFIM) plays a crucial role in quantum optimization algorithms such as Variational Quantum Imaginary Time Evolution and Quantum Natural Gradient Descent. However, computing the full […]
Quantum 9, 1797 (2025). https://doi.org/10.22331/q-2025-07-21-1797 The interplay between non-stabilizerness and entanglement in random states is a very rich arena of study for the understanding of quantum advantage and complexity. In this work, we tackle the […]
Quantum 9, 1796 (2025). https://doi.org/10.22331/q-2025-07-14-1796 Photonics represents one of the most promising approaches to large-scale quantum computation with millions of qubits and billions of gates, owing to the potential for room-temperature operation, high clock speeds, […]
Quantum 9, 1795 (2025). https://doi.org/10.22331/q-2025-07-14-1795 Graph states are key resources for measurement-based quantum computing, which is particularly promising for photonic systems. Fusions are probabilistic Bell state measurements, measuring pairs of parity operators of two qubits. […]
Quantum 9, 1794 (2025). https://doi.org/10.22331/q-2025-07-14-1794 We consider the time evolution of multiple clusters of Brownian Sachdev-Ye-Kitaev (SYK), i.e. systems of N Majorana fermions with a noisy interaction term. In addition to the unitary evolution, we […]
Quantum 9, 1793 (2025). https://doi.org/10.22331/q-2025-07-11-1793 We investigate the sensing capacity of non-equilibrium dynamics in quantum systems exhibiting Bloch oscillations. By focusing on the resource efficiency of the probe, quantified by quantum Fisher information, we find […]
Quantum 9, 1792 (2025). https://doi.org/10.22331/q-2025-07-11-1792 This work introduces a self-learning protocol that incorporates measurement and feedback into variational quantum circuits for efficient quantum state preparation. By combining projective measurements with conditional feedback, the protocol learns […]
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