Quantum 9, 1864 (2025). https://doi.org/10.22331/q-2025-09-24-1864 We prove that adaptive strategies offer no advantage over non-adaptive ones for learning and testing Pauli channels using entangled inputs. This key observation allows us to characterize the query complexity […]
Quantum 9, 1863 (2025). https://doi.org/10.22331/q-2025-09-24-1863 Memory or time-non-local effects in open quantum dynamics pose theoretical as well as practical challenges in the understanding and control of noisy quantum systems. While there has been a comprehensive […]
Quantum 9, 1862 (2025). https://doi.org/10.22331/q-2025-09-24-1862 We introduce an explicit construction for a key distribution protocol in the Quantum Computational Timelock (QCT) security model, where one assumes that computationally secure encryption may only be broken after […]
Quantum 9, 1861 (2025). https://doi.org/10.22331/q-2025-09-18-1861 Non-reciprocal couplings or drivings are known to induce steady-state, directional, amplification in driven-dissipative bosonic lattices. This amplification phenomenon has been recently linked to the existence of a non-zero topological invariant […]
Quantum 9, 1860 (2025). https://doi.org/10.22331/q-2025-09-16-1860 Among the cost metrics characterizing a quantum circuit, the $T$-count stands out as one of the most crucial as its minimization is particularly important in various areas of quantum computation […]
Quantum 9, 1859 (2025). https://doi.org/10.22331/q-2025-09-16-1859 We show how the Loschmidt echo of a product state after a quench to a conformal invariant critical point and its leading finite time corrections can be predicted by using […]
Quantum 9, 1858 (2025). https://doi.org/10.22331/q-2025-09-15-1858 Magic State Distillation (MSD) has been a research focus for fault-tolerant quantum computing due to the need for non-Clifford resource in gaining quantum advantage. Although many of the MSD protocols […]
Quantum 9, 1857 (2025). https://doi.org/10.22331/q-2025-09-11-1857 Many promising quantum applications depend on the efficient quantum simulation of an exponentially large sparse Hamiltonian, a task known as sparse Hamiltonian simulation, which is fundamentally important in quantum computation. […]
Quantum 9, 1856 (2025). https://doi.org/10.22331/q-2025-09-11-1856 We present BAE, a problem-tailored and noise-aware Bayesian algorithm for quantum amplitude estimation. In a fault tolerant scenario, BAE is capable of saturating the Heisenberg limit; if device noise is […]
Quantum 9, 1855 (2025). https://doi.org/10.22331/q-2025-09-11-1855 Highly correlated biphoton states are powerful resources in quantum optics, both for fundamental tests of the theory and practical applications. In particular, high-dimensional spatial correlation has been used in several […]
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