Quantum 9, 1694 (2025). https://doi.org/10.22331/q-2025-04-07-1694 The accurate and efficient energy estimation of quantum Hamiltonians consisting of Pauli observables is an essential task in modern quantum computing. We introduce a Resource-Optimized Grouping Shadow (ROGS) algorithm, which […]
Quantum 9, 1693 (2025). https://doi.org/10.22331/q-2025-04-07-1693 Spatially-coupled (SC) codes is a class of convolutional LDPC codes that has been well investigated in classical coding theory thanks to their high performance and compatibility with low-latency decoders. We […]
Quantum 9, 1692 (2025). https://doi.org/10.22331/q-2025-04-07-1692 The dynamics of monitored systems can exhibit a measurement-induced phase transition (MIPT) between entangling and disentangling phases, tuned by the measurement rate. When the dynamics obeys a continuous symmetry, the […]
Quantum 9, 1691 (2025). https://doi.org/10.22331/q-2025-04-07-1691 Quantum money is the task of verifying the validity of banknotes while ensuring that they cannot be counterfeited. Public-key quantum money allows anyone to perform verification, while the private-key setting […]
Quantum 9, 1690 (2025). https://doi.org/10.22331/q-2025-04-07-1690 High-dimensional quantum computing has generated significant interest due to its potential to address scalability and error correction challenges faced by traditional qubit-based systems. This paper investigates the Average Gate Fidelity […]
Quantum 9, 1689 (2025). https://doi.org/10.22331/q-2025-04-03-1689 Learning in games has emerged as a powerful tool for machine learning with numerous applications. Quantum games model interactions between strategic players who have access to quantum resources, and several […]
Quantum 9, 1688 (2025). https://doi.org/10.22331/q-2025-04-03-1688 Complexity theory typically focuses on the difficulty of solving computational problems using classical inputs and outputs, even with a quantum computer. In the quantum world, it is natural to apply […]
Quantum 9, 1687 (2025). https://doi.org/10.22331/q-2025-04-03-1687 This paper introduces quantum edge detection, aimed at locating boundaries of quantum domains where all particles share the same pure state. Focusing on the 1D scenario of a string of […]
Quantum 9, 1686 (2025). https://doi.org/10.22331/q-2025-04-03-1686 What is fundamentally quantum? We argue that most of the features, problems, and paradoxes – such as the measurement problem, the Wigner’s friend paradox and its proposed solutions, single particle […]
Quantum 9, 1685 (2025). https://doi.org/10.22331/q-2025-04-03-1685 We study free fermion systems under adaptive quantum dynamics consisting of unitary gates and projective measurements followed by corrective unitary operations. We further introduce a classical flag for each site, […]
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