Quantum 9, 1682 (2025). https://doi.org/10.22331/q-2025-04-01-1682 We investigate the feasibility of early fault-tolerant quantum algorithms focusing on ground-state energy estimation problems. In particular, we examine the computation of the cumulative distribution function (CDF) of the spectral […]
Quantum 9, 1681 (2025). https://doi.org/10.22331/q-2025-04-01-1681 We investigate operator dynamics and entanglement growth in dual-unitary circuits, a class of locally scrambled quantum systems that enables efficient simulation beyond the exponential complexity of the Hilbert space. By […]
Quantum 9, 1680 (2025). https://doi.org/10.22331/q-2025-03-27-1680 Quantum reference frames are needed in quantum theory for much the same reasons that reference frames are in classical theories: to manifest invariance in line with fundamental relativity principles and […]
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 […]
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