Quantum 5, 501 (2021). https://doi.org/10.22331/q-2021-07-13-501 Topological materials have potential applications for quantum technologies. Non-interacting topological materials, such as e.g., topological insulators and superconductors, are classified by means of fundamental symmetry classes. It is instead only […]
Quantum 5, 500 (2021). https://doi.org/10.22331/q-2021-07-13-500 Energy storage is a basic physical process with many applications. When considering this task at the quantum scale, it becomes important to optimise the non-equilibrium dynamics of energy transfer to […]
Quantum 5, 499 (2021). https://doi.org/10.22331/q-2021-07-13-499 Activation of Bell nonlocality refers to the phenomenon that some entangled mixed states that admit a local hidden variable model in the standard Bell scenario nevertheless reveal their nonlocal nature […]
Quantum 5, 498 (2021). https://doi.org/10.22331/q-2021-07-08-498 The Wigner’s friend paradox concerns one of the most puzzling problems of quantum mechanics: the consistent description of multiple nested observers. Recently, a variation of Wigner’s gedankenexperiment, introduced by Frauchiger […]
Quantum 5, 497 (2021). https://doi.org/10.22331/q-2021-07-06-497 This paper presents “Stim”, a fast simulator for quantum stabilizer circuits. The paper explains how Stim works and compares it to existing tools. With no foreknowledge, Stim can analyze a […]
Quantum 5, 496 (2021). https://doi.org/10.22331/q-2021-07-05-496 We study supervised learning algorithms in which a quantum device is used to perform a computational subroutine – either for prediction via probability estimation, or to compute a kernel via […]
Quantum 5, 495 (2021). https://doi.org/10.22331/q-2021-07-05-495 We consider simulating quantum systems on digital quantum computers. We show that the performance of quantum simulation can be improved by simultaneously exploiting commutativity of the target Hamiltonian, sparsity of […]
Quantum 5, 494 (2021). https://doi.org/10.22331/q-2021-07-05-494 One of the lowest-order corrections to Gaussian quantum mechanics in infinite-dimensional Hilbert spaces are Airy functions: a uniformization of the stationary phase method applied in the path integral perspective. We […]
Quantum 5, 493 (2021). https://doi.org/10.22331/q-2021-07-01-493 Certification of nonlocality of quantum mechanics is an important fundamental test that typically requires prolonged data collection and is only revealed in an in-depth analysis. These features are often particularly […]
Quantum 5, 492 (2021). https://doi.org/10.22331/q-2021-07-01-492 We present a hardware agnostic error mitigation algorithm for near term quantum processors inspired by the classical Lanczos method. This technique can reduce the impact of different sources of noise […]
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