Quantum 8, 1469 (2024). https://doi.org/10.22331/q-2024-09-11-1469 Here, we investigate the fractal-lattice Hubbard model using various numerical methods: exact diagonalization, the self-consistent diagonalization of a (mean-field) Hartree-Fock Hamiltonian and state-of-the-art Auxiliary-Field Quantum Monte Carlo. We focus on […]
Quantum 8, 1468 (2024). https://doi.org/10.22331/q-2024-09-11-1468 The code-capacity threshold of a scalable quantum error correcting stabilizer code can be expressed as a thermodynamic phase transition of a corresponding random-bond Ising model. Here we study the XY […]
Quantum 8, 1467 (2024). https://doi.org/10.22331/q-2024-09-11-1467 Classical shadow tomography serves as a potent tool for extracting numerous properties from quantum many-body systems with minimal measurements. Nevertheless, prevailing methods yielding optimal performance for few-body operators necessitate the […]
Quantum 8, 1466 (2024). https://doi.org/10.22331/q-2024-09-09-1466 In lumped-element electrical circuit theory, the problem of solving Maxwell’s equations in the presence of media is reduced to two sets of equations, the constitutive equations encapsulating local geometry and […]
Quantum 8, 1465 (2024). https://doi.org/10.22331/q-2024-09-09-1465 We present an open-source database of superconducting quantum device designs that may be used as the starting point for customized devices. Each design can be generated programmatically using the open-source […]
Quantum 8, 1464 (2024). https://doi.org/10.22331/q-2024-09-09-1464 What would be the consequences if there were fundamental limits to our ability to experimentally explore the world? In this work we seriously consider this question. We assume the existence […]
Quantum 8, 1463 (2024). https://doi.org/10.22331/q-2024-09-09-1463 Quantum-enhanced (i.e., higher performance by quantum effects than any classical methods) mean value estimation of observables is a fundamental task in various quantum technologies; in particular, it is an essential […]
Quantum 8, 1462 (2024). https://doi.org/10.22331/q-2024-09-06-1462 In this work, we explore the interplay of confinement, string breaking and entanglement asymmetry on a 1D quantum Ising chain. We consider the evolution of an initial domain wall and […]
Quantum 8, 1461 (2024). https://doi.org/10.22331/q-2024-09-05-1461 The nonstabilizerness, or magic, is an essential quantum resource to perform universal quantum computation. Robustness of magic (RoM) in particular characterizes the degree of usefulness of a given quantum state […]
Quantum 8, 1460 (2024). https://doi.org/10.22331/q-2024-09-04-1460 We numerically analyze the feasibility of a platform-neutral, general strategy to perform quantum simulations of fermionic lattice field theories under open boundary conditions. The digital quantum simulator requires solely one- […]
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