Quantum 6, 865 (2022). https://doi.org/10.22331/q-2022-11-28-865 One of the key ways in which quantum mechanics differs from relativity is that it requires a fixed background reference frame for spacetime. In fact, this appears to be one […]
Category: quantumjournal
Quantum 6, 864 (2022). https://doi.org/10.22331/q-2022-11-28-864 Does gravity constrain computation? We study this question using the AdS/CFT correspondence, where computation in the presence of gravity can be related to non-gravitational physics in the boundary theory. In […]
Quantum 6, 863 (2022). https://doi.org/10.22331/q-2022-11-28-863 Gaussian boson sampling is a model of photonic quantum computing that has attracted attention as a platform for building quantum devices capable of performing tasks that are out of reach […]
Quantum 6, 862 (2022). https://doi.org/10.22331/q-2022-11-28-862 The data processing inequality is the most basic requirement for any meaningful measure of information. It essentially states that distinguishability measures between states decrease if we apply a quantum channel […]
Quantum 6, 861 (2022). https://doi.org/10.22331/q-2022-11-17-861 Approximate combinatorial optimisation has emerged as one of the most promising application areas for quantum computers, particularly those in the near term. In this work, we focus on the quantum […]
Quantum 6, 860 (2022). https://doi.org/10.22331/q-2022-11-17-860 Quantum simulation is a prominent application of quantum computers. While there is extensive previous work on simulating finite-dimensional systems, less is known about quantum algorithms for real-space dynamics. We conduct […]
Quantum 6, 859 (2022). https://doi.org/10.22331/q-2022-11-14-859 Invariance under Lorentz transformations is fundamental to both the standard model and general relativity. Testing Lorentz-symmetry violation (LSV) via atomic systems attracts extensive interests in both theory and experiment. In […]
Quantum 6, 858 (2022). https://doi.org/10.22331/q-2022-11-10-858 I show that if a finite-dimensional density matrix has strictly smaller von Neumann entropy than a second one of the same dimension (and the rank is not bigger), then sufficiently […]
Quantum 6, 857 (2022). https://doi.org/10.22331/q-2022-11-10-857 In this letter, we propose how to measure the quantized nonlinear transport using two-dimensional ultracold atomic Fermi gases in a harmonic trap. This scheme requires successively applying two optical pulses […]
Quantum 6, 856 (2022). https://doi.org/10.22331/q-2022-11-10-856 We systematically investigate the robustness of symmetry protected topological (SPT) order in open quantum systems by studying the evolution of string order parameters and other probes under noisy channels. We […]
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