| Volume 95, Issue 3 (partial) July - September 2023 | | Advertisement  | The first published articles from PRX Life, APS's new interdisciplinary, open-access journal exclusively for quantitative biological research, are now online. Access highly selective research at the intersection of physics and biology every month by signing up for alerts. | | | | | | Advertisement | 2024 Committee Nominations are currently open, and will close August 4. Please nominate colleagues (or yourself). Service by APS's diverse, talented, and engaged membership strengthens our community and enhances the leadership skills of committee members. | | | | | Advertisement | Get to know the candidates for Vice President, General Councilor, International Councilor, and Chair-Elect of the Nominating Committee. Polls are currently open, and will close August 25. Learn more. | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Michael P. Zaletel, Mikhail Lukin, Christopher Monroe, Chetan Nayak, Frank Wilczek, and Norman Y. Yao Rev. Mod. Phys. 95, 031001 (2023) – Published 7 July 2023  | The spontaneous breaking of time translational invariance, which leads to time crystals, is harder to achieve than that of other continuous symmetries, including spatial translational invariance. In recent years it has become clear that ergodicity breaking is crucial for the stabilization of time crystals. This Colloquium explains the concepts behind time crystals, as well as recent theoretical and experimental advances in this exciting field. | | | | | | Dominik Hangleiter and Jens Eisert Rev. Mod. Phys. 95, 035001 (2023) – Published 20 July 2023  | Quantum computers have improved and recent experiments have claimed quantum advantage – completion of a computational task that is evidently hard for any conventional computer. The problem solved is that of obtaining samples, by quantum measurement, from a certain probability distribution. This review shows in what precise way quantum random sampling can be seen as a computation. It explains what that computation solves, in what way it outperforms classical computations, and what methods of verification are available. Quantum random sampling becomes a first test of the presumed exponential computational advantage of quantum computers over classical ones. | | | | | | | |
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