| Volume 109, Issue 1 January 2024 | | Advertisement | Registration is still open for March Meeting 2024 - one of the largest and most exciting conferences in physics! Witness groundbreaking physics research, network with potential employers, and prepare for career success at March Meeting 2024. Register today. | | | | |
Advertisement | Help decide on publishing the most exciting and consequential results in quantum science and technologies. PRX Quantum seeks a talented candidate with deep research experience in quantum information at the postdoctoral level and outstanding communication skills to work with the Editorial Team and top leaders in the field. Expertise in quantum computing and algorithms is a plus. Learn more. | | | | | | Not an APS member? Join today to start connecting with a community of more than 50,000 physicists. | | | | Editors' Suggestion Giulio Camillo, Pedro Lauand, Davide Poderini, Rafael Rabelo, and Rafael Chaves Phys. Rev. A 109, 012220 (2024) – Published 24 January 2024  | The authors study the link between causal relations and quantum correlations. In particular, given a network of causal relationships between physical systems, the authors calculate how many classical, quantum, and "nonsignaling" types of correlations arise. They compare their method to other approaches, and find that the often-used inflation technique misses a significant portion of nonclassical behavior. | | | | | | Editors' Suggestion Gopal Chandra Santra, Fred Jendrzejewski, Philipp Hauke, and Daniel J. Egger Phys. Rev. A 109, 012413 (2024) – Published 8 January 2024  | The authors study the connection between the solution of the quantum approximate optimization algorithm (QAOA) and the generation of squeezed states. In doing so, they reveal a tight connection between the two seemingly unrelated fields of quantum metrology and computing. They also suggest the potential use of squeezing as a benchmark for assessing the quality of quantum algorithms. | | | | | | Editors' Suggestion Laura Lewis, Daiwei Zhu, Alexandru Gheorghiu, Crystal Noel, Or Katz, Bahaa Harraz, Qingfeng Wang, Andrew Risinger, Lei Feng, Debopriyo Biswas, Laird Egan, Thomas Vidick, Marko Cetina, and Christopher Monroe Phys. Rev. A 109, 012610 (2024) – Published 9 January 2024  | The authors implement a noninteractive test of quantumness, or an algorithm for verifying whether an untrusted device is capable of quantum computation, on an ion-trap quantum computer. Their results clearly exceed the classical bound. | | | | | | Editors' Suggestion Alexander A. Milner, Ian MacPhail-Bartley, Katarina Preocanin, Shroyon Dasgupta, Xuanshan Peng, and Valery Milner Phys. Rev. A 109, 013110 (2024) – Published 23 January 2024  | The authors experimentally demonstrate control of molecular rotation in bulk superfluid ^{4}He. The authors show that both the degree of rotational excitation of metastable helium dimers and the directionality of molecular rotation can be controlled by different aspects of the pulse trains. | | | | | | Editors' Suggestion Yong-Kang Fang, Lei Geng, and Liang-You Peng Phys. Rev. A 109, 013113 (2024) – Published 29 January 2024  | The authors study two-photon double ionization induced by chirped pulses, which shows additional features in the photoelectron energy spectrum compared to the case without chirp. They develop an analytical model that is able to shed light on the origin of these peaks, discovered in earlier theoretical work but unexplained until now. | | | | | | Editors' Suggestion Max Cohen, Max Casebolt, Yutan Zhang, Kaden R. A. Hazzard, and Richard Scalettar Phys. Rev. A 109, 013303 (2024) – Published 3 January 2024  | The authors introduce a classical spin model motivated by the quantum Hamiltonian for synthetic-dimension systems based on ultracold molecules or Rydberg atoms. The authors use mean-field theory, Monte Carlo methods, and machine-learning approaches to study the phase diagram. | | | | | | Editors' Suggestion Hao-Tian Wei, Eduardo Ibarra-García-Padilla, Michael L. Wall, and Kaden R. A. Hazzard Phys. Rev. A 109, 013318 (2024) – Published 19 January 2024  | The authors develop a method to compute the Hubbard-model parameters for tunnel-coupled tweezer arrays given the trap parameters. The method also solves the inverse problem of finding trap configurations given desired Hubbard parameters, providing tools for using tunnel-coupled tweezer arrays. | | | | | | Editors' Suggestion Murat Yessenov, Miguel Romer, Naoki Ichiji, and Ayman F. Abouraddy Phys. Rev. A 109, 013509 (2024) – Published 19 January 2024  | The authors present an experimental procedure that is analogous to Lorentz boosts of space-time wave packets (STWPs), in that the physical transformation is identical to the mathematical impact of a Lorentz transformation except for an overall Doppler shift to the carrier. Their work indicates that a Lorentz boost of a STWP results in another STWP. | | | | | | Editors' Suggestion Juanjuan Ren, Sebastian Franke, Becca VanDrunen, and Stephen Hughes Phys. Rev. A 109, 013513 (2024) – Published 23 January 2024  | The authors derive a correction to the spontaneous emission rate and the classical Purcell factor in linear media that includes gain and loss within the framework of a classical light-matter theory. The results fully recover a recently presented quantum mechanical form, establishing an essential classical-to-quantum correspondence of spontaneous emission, and are extended to also account for local field effects. | | | | | | | |
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