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 […]
What happens when a quantum physicist is frustrated by the limitations of quantum mechanics when trying to study densely packed atoms? At EPFL, you get a metamaterial, an engineered material that exhibits exotic properties. Click […]
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 […]
Insider Brief PsiQuantum is raising at least $750 million at a $6 billion pre-money valuation to build a fault-tolerant quantum computer using photonic chips, Reuters reports. The company manufactures its light-based qubits on silicon chips […]
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 […]
Insider Brief Classiq Technologies, in collaboration with Sumitomo Corporation and Mizuho–DL Financial Technology, achieved up to 95% compression of quantum circuits for Monte Carlo simulations used in financial risk analysis. The study compared traditional and […]
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