Every Quanta article, video and podcast has its own backstory. By the time it arrives on your screen, our staff has nurtured it through weeks (and sometimes months) of careful work: research, reporting, writing, editing, […]
The use of light to produce transient phases in quantum materials is fast becoming a novel way to engineer new properties in them, such as the generation of superconductivity or nanoscale topological defects. However, visualizing […]
Executive Summary As 2022 came to an end and winter settled in, the French quantum community heated up. The ecosystem was busy across all the segments that make up this emerging industry — from government […]
Quantum 6, 884 (2022). https://doi.org/10.22331/q-2022-12-22-884 Quantum speed limits (QSLs) identify fundamental time scales of physical processes by providing lower bounds on the rate of change of a quantum state or the expectation value of an […]
Quantum 6, 883 (2022). https://doi.org/10.22331/q-2022-12-22-883 Equivalent approaches to determine eigenfrequencies of the Liouvillians of open quantum systems are discussed using the solution of the Heisenberg-Langevin equations and the corresponding equations for operator moments. A simple […]
A recent Nature publication continues to generate headlines over its findings that scientists from the California Institute of Technology developed a model of a traversable wormhole on the Google Sycamore quantum processing system. Click to […]
Quantum 6, 882 (2022). https://doi.org/10.22331/q-2022-12-22-882 This paper is concerned with complexity theoretic aspects of a general formulation of quantum game theory that models strategic interactions among rational agents that process and exchange quantum information. In […]
We can think of a mathematician as a kind of archaeologist, painstakingly brushing dust off the hidden structures of the world. But the structures mathematicians reveal are not only durable, but also inevitable. They could […]
Quantum 6, 881 (2022). https://doi.org/10.22331/q-2022-12-22-881 Quantum machine learning techniques have been proposed as a way to potentially enhance performance in machine learning applications. In this paper, we introduce two new quantum methods for neural networks. […]
Quantum 6, 880 (2022). https://doi.org/10.22331/q-2022-12-22-880 The security of finite-length keys is essential for the implementation of device-independent quantum key distribution (DIQKD). Presently, there are several finite-size DIQKD security proofs, but they are mostly focused on […]
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