Quantum 9, 1679 (2025). https://doi.org/10.22331/q-2025-03-27-1679 There is a large body of work studying what forms of computational hardness are needed to realize classical cryptography. In particular, one-way functions and pseudorandom generators can be built from […]
Quantum 9, 1678 (2025). https://doi.org/10.22331/q-2025-03-26-1678 The growth of the entanglement between two disjoint intervals and its complement after a quantum quench is regarded as a dynamical chaos indicator. Namely, it is expected to show qualitatively […]
Quantum 9, 1677 (2025). https://doi.org/10.22331/q-2025-03-26-1677 The behavior of systems far from equilibrium is often complex and unpredictable, challenging and sometimes overturning the physical intuition derived from equilibrium scenarios. One striking example of this is the […]
Quantum 9, 1676 (2025). https://doi.org/10.22331/q-2025-03-26-1676 We propose a fault-tolerant quantum error correction architecture consisting of a linear array of emitters and delay lines. In our scheme, a resource state for fault-tolerant quantum computation is generated […]
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, […]
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