Perspective Perspective on “Circuits of space and time quantum channels” Shane Dooley, Quantum Views 7, 75 (2023). Summary Throughout the history of physics, exactly solvable models have provided valuable insight into various physical phenomena [1]. Conventional wisdom says that exact solutions are usual…
Perspective Tailoring randomized-measurement schemes for practical devices Pei Zeng, Quantum Views 7, 74 (2023). We live in a quantum world, yet, our everyday experiences seem to present themselves in terms of classical information. To examine large quantum systems, we can obtain classical information…
Perspective Information erasure through quantum many-body effects Marcus V. S. Bonança, Quantum Views 7, 73 (2023). The problem of quantifying the thermodynamic cost of bit erasure has received a great attention since its first proposal [1,2]. Its relation with previously considered problems of the thermo…
Editorial Quantum Decision Making Nicolai Friis, Quantum Views 7, 72 (2023). No, what you are about to read is not about the latest quantum-research band waggon to jump on. Instead, this editorial is intended to give an inside view on the editorial process at Quantum…
Perspective Universality in quantum snapshots Pieter W. Claeys, Quantum Views 7, 71 (2023). Thermalization and random matrices One of the main challenges in quantum mechanics lies in understanding the dynamical behaviour of many-body systems. How do isolated quantum systems relax t…
Perspective Extending Quantum topological data analysis to persistent homology Sam McArdle, Quantum Views 7, 70 (2023). It is an open challenge to design quantum algorithms for machine learning that do not need access to large amounts of data – the efficient loading of which would require challenging-t…
Perspective High-performance Photonic Entanglement Generation Xiongfeng Ma, Quantum Views 6, 69 (2022). Background With decades of development progress in quantum science and technology, we are at the dawn of entanglement-based quantum networks [1]. Theoretical research has gone deep into the…
Perspective Quantum thermal machines: a simple scheme with realistic bath modelling Felipe Barra, Quantum Views 6, 68 (2022). Thermal machines interact with two or more heat reservoirs to perform work on a third system or use work to cool down the hot reservoir. In the first case, the machine works as an engine, an…
Perspective A Quantum Theory for Bose–Einstein Condensation of the Ideal Gas Fabrice P. Laussy, Quantum Views 6, 67 (2022). Historical background: insights of a genius. The achievements of Einstein in formulating the laws governing nothing short of space and time are so monumental that they often overshadow his…
Perspective The signaling dimension of physical systems Michele Dall’Arno, Quantum Views 6, 66 (2022). The question we start our analysis from is whether a quantum system can outperform a classical system of the same dimension for some communication scenarios. By “communication scenario'', w…
Perspective Designing algorithms for estimating ground state properties on early fault-tolerant quantum computers Yu Tong, Quantum Views 6, 65 (2022). Estimating ground-state properties in quantum chemistry, e.g., the ground-state energy and observable expectation values, has been considered a promising candidate for demonstrating a useful…
Perspective Randomized benchmarking with a tractable continuously generated group Martin Kliesch, Quantum Views 6, 64 (2022). 1 Background For any given implementation of a quantum computer one would like to have a precise description of what its logical components are. Ideally, this information would include full…
Perspective Towards practical quantum LDPC codes Joschka Roffe, Quantum Views 5, 63 (2021). In quantum computing there is no such thing as a perfect qubit; interaction with the environment is inevitable and quantum error correction must be used to ensure fault tolerance. Fortunatel…
Perspective Fast-Forwardable Quantum Evolution and Where to Find Them Yuan Su, Quantum Views 5, 62 (2021). Simulating the time evolution of a quantum system is one of the major applications of quantum computers. The apparent intractability of this problem on a classical computer has led Feynman […
Perspective Fisher Information: A Crucial Tool for NISQ Research Kishor Bharti, Quantum Views 5, 61 (2021). Quantum computers available today consist of around a few dozen qubits. Each quantum gate operation is afflicted by a certain level of noise, and hence the computations are restricted…
Perspective Gate set tomography is not just hyperaccurate, it’s a different way of thinking Gregory A. L. White, Quantum Views 5, 60 (2021). Characterising quantum gates When a quantum computation breaks down, where — and how — did the error occur? We often take for granted the diversity of intricate noise in quantum informatio…