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- […]
Quantum 8, 1459 (2024). https://doi.org/10.22331/q-2024-09-03-1459 In this paper we introduce and investigate the concept of a $textit{perfect quantum protractor}$, a pure quantum state $|psirangleinmathcal{H}$ that generates three different orthogonal bases of $mathcal{H}$ under rotations around […]
Quantum 8, 1458 (2024). https://doi.org/10.22331/q-2024-09-03-1458 Quantum networks crucially rely on the availability of high-quality entangled pairs of qubits, known as entangled links, distributed across distant nodes. Maintaining the quality of these links is a challenging […]
Quantum 8, 1457 (2024). https://doi.org/10.22331/q-2024-08-29-1457 This work provides a nonasymptotic error analysis of quantum Krylov algorithms based on real-time evolutions, subject to generic errors in the outputs of the quantum circuits. We prove upper and […]
Quantum 8, 1456 (2024). https://doi.org/10.22331/q-2024-08-29-1456 Quantum state designs, by enabling an efficient sampling of random quantum states, play a quintessential role in devising and benchmarking various quantum protocols with broad applications ranging from circuit designs […]
Quantum 8, 1455 (2024). https://doi.org/10.22331/q-2024-08-29-1455 Classical shadows (CS) offer a resource-efficient means to estimate quantum observables, circumventing the need for exhaustive state tomography. Here, we clarify and explore the connection between CS techniques and least […]
Quantum 8, 1454 (2024). https://doi.org/10.22331/q-2024-08-29-1454 Most quantum theorists are familiar with different ways of describing the effective quantum dynamics of a system coupled to external degrees of freedom, such as the Born-Markov master equation or […]
Recent Comments