Quantum 9, 1675 (2025). https://doi.org/10.22331/q-2025-03-26-1675 Owing to their great expressivity and versatility, neural networks have gained attention for simulating large two-dimensional quantum many-body systems. However, their expressivity comes with the cost of a challenging optimization […]
Quantum 9, 1674 (2025). https://doi.org/10.22331/q-2025-03-25-1674 We present a novel quantum high-dimensional linear regression algorithm with an $ell_1$-penalty based on the classical LARS (Least Angle Regression) pathwise algorithm. Similarly to available classical algorithms for Lasso, our […]
Quantum 9, 1673 (2025). https://doi.org/10.22331/q-2025-03-25-1673 We propose a family of explicit geometrically local circuits on a 2-dimensional planar grid of qudits, realizing any abelian non-chiral topological phase as an actively error-corrected fault-tolerant memory. These circuits […]
Quantum 9, 1672 (2025). https://doi.org/10.22331/q-2025-03-25-1672 Multi-armed bandits are one of the theoretical pillars of reinforcement learning. Recently, the investigation of quantum algorithms for multi-armed bandit problems was started, and it was found that a quadratic […]
Quantum 9, 1671 (2025). https://doi.org/10.22331/q-2025-03-25-1671 Flat bands (FBs) are energy bands with zero group velocity, which in electronic systems were shown to favor strongly correlated phenomena. Indeed, a FB can be spanned with a basis […]
Quantum 9, 1670 (2025). https://doi.org/10.22331/q-2025-03-25-1670 We propose a definition of wavefunction “branchings”: quantum superpositions which can’t be feasibly distinguished from the corresponding mixed state, even under time evolution. Our definition is largely independent of interpretations, […]
Quantum 9, 1669 (2025). https://doi.org/10.22331/q-2025-03-25-1669 Computing vacuum states of lattice gauge theories (LGTs) containing fermionic degrees of freedom can present significant challenges for classical computation using Monte-Carlo methods. Quantum algorithms may offer a pathway towards […]
Quantum 9, 1668 (2025). https://doi.org/10.22331/q-2025-03-25-1668 In quantum many-body systems, complex dynamics delocalize the physical degrees of freedom. This spreading of information throughout the system has been extensively studied in relation to quantum thermalization, scrambling, and […]
Quantum 9, 1667 (2025). https://doi.org/10.22331/q-2025-03-24-1667 We propose an algorithm that combines the inchworm method and the frozen Gaussian approximation to simulate the Caldeira-Leggett model in which a quantum particle is coupled with thermal harmonic baths. […]
Quantum 9, 1666 (2025). https://doi.org/10.22331/q-2025-03-20-1666 Quantum thermodynamics and quantum entanglement represent two pivotal quantum resource theories with significant relevance in quantum information science. Despite their importance, the intricate relationship between these two theories is still […]
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