Quantum 6, 655 (2022). https://doi.org/10.22331/q-2022-02-16-655 Information-theoretic ideas have provided numerous insights in the progress of fundamental physics, especially in our pursuit of quantum gravity. In particular, the holographic entanglement entropy is a very useful tool […]
Quantum 6, 654 (2022). https://doi.org/10.22331/q-2022-02-16-654 Quantum systems generally exhibit different kinds of correlations. In order to compare them on equal footing, one uses the so-called distance-based approach where different types of correlations are captured by […]
Quantum 6, 653 (2022). https://doi.org/10.22331/q-2022-02-16-653 A multiple access channel describes a situation in which multiple senders are trying to forward messages to a single receiver using some physical medium. In this paper we consider scenarios […]
Quantum 6, 652 (2022). https://doi.org/10.22331/q-2022-02-15-652 The $textit{stabilizer rank}$ of a quantum state $psi$ is the minimal $r$ such that $left| psi right rangle = sum_{j=1}^r c_j left|varphi_j rightrangle$ for $c_j in mathbb{C}$ and stabilizer states […]
Quantum 6, 651 (2022). https://doi.org/10.22331/q-2022-02-15-651 Steering criteria are conditions whose violation excludes the possibility of describing the observed measurement statistics with local hidden state (LHS) models. When the available data do not allow to exclude […]
A couple months ago, friends and business contacts started asking me for a crash course on my professional research studying virtual environments. Their interest reflects an explosion—which you’ve probably noticed—of noise and hype surrounding something […]
Quantum 6, 650 (2022). https://doi.org/10.22331/q-2022-02-10-650 The thermal equilibrium properties of physical systems can be described using Gibbs states. It is therefore of great interest to know when such states allow for an easy description. In […]
Quantum 6, 649 (2022). https://doi.org/10.22331/q-2022-02-10-649 The characterization of open quantum systems is a central and recurring problem for the development of quantum technologies. For time-independent systems, an (often unique) steady state describes the average physics […]
Quantum 6, 648 (2022). https://doi.org/10.22331/q-2022-02-10-648 We examine general Gottesman-Kitaev-Preskill (GKP) codes for continuous-variable quantum error correction, including concatenated GKP codes, through the lens of lattice theory, in order to better understand the structure of this […]
Quantum 6, 647 (2022). https://doi.org/10.22331/q-2022-02-09-647 In this article we consider flagged extensions of convex combination of quantum channels, and find general sufficient conditions for the degradability of the flagged extension. An immediate application is a […]
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