Quantum 7, 922 (2023). https://doi.org/10.22331/q-2023-02-16-922 Bell inequality tests where the detection efficiency is below a certain threshold $eta_{rm{crit}}$ can be simulated with local hidden-variable models. Here, we introduce a method to identify Bell tests requiring […]
Quantum 7, 921 (2023). https://doi.org/10.22331/q-2023-02-09-921 As the width and depth of quantum circuits implemented by state-of-the-art quantum processors rapidly increase, circuit analysis and assessment via classical simulation are becoming unfeasible. It is crucial, therefore, to […]
Quantum 7, 920 (2023). https://doi.org/10.22331/q-2023-02-09-920 A quantum internet aims at harnessing networked quantum technologies, namely by distributing bipartite entanglement between distant nodes. However, multipartite entanglement between the nodes may empower the quantum internet for additional […]
Quantum 7, 919 (2023). https://doi.org/10.22331/q-2023-02-09-919 The topology of classical networks is determined by physical links between nodes, and after a network request the links are used to establish the desired connections. Quantum networks offer the […]
Quantum 7, 918 (2023). https://doi.org/10.22331/q-2023-02-09-918 In a previous work [J. Chem. Phys. 155, 244111 (2021)], we found counterexamples to the fundamental Hohenberg-Kohn theorem from density-functional theory in finite-lattice systems represented by graphs. Here, we demonstrate […]
Quantum 7, 917 (2023). https://doi.org/10.22331/q-2023-02-09-917 The quantum kicked rotor is well-known for displaying dynamical (Anderson) localization. It has recently been shown that a periodically kicked Tonks gas will always localize and converge to a finite […]
Quantum 7, 916 (2023). https://doi.org/10.22331/q-2023-02-09-916 Computing the ground-state properties of quantum many-body systems is a promising application of near-term quantum hardware with a potential impact in many fields. The conventional algorithm quantum phase estimation uses […]
Quantum 7, 915 (2023). https://doi.org/10.22331/q-2023-02-09-915 Genuinely entangled subspaces are a class of subspaces in the multipartite Hilbert spaces that are composed of only genuinely entangled states. They are thus an interesting object of study in […]
Quantum 7, 914 (2023). https://doi.org/10.22331/q-2023-02-09-914 We present a method to detect bipartite entanglement based on number-phase-like uncertainty relations in split spin ensembles. First, we derive an uncertainty relation that plays the role of a number-phase […]
Quantum 7, 913 (2023). https://doi.org/10.22331/q-2023-02-02-913 We present substantially generalized and improved quantum algorithms over prior work for inhomogeneous linear and nonlinear ordinary differential equations (ODE). Specifically, we show how the norm of the matrix exponential […]
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