Jan Carlo Schumann, Igor Lesanovsky, Parvinder Solanki
{"title":"Hierarchical Time Crystals.","authors":"Jan Carlo Schumann, Igor Lesanovsky, Parvinder Solanki","doi":"10.1103/7mv6-4g91","DOIUrl":"https://doi.org/10.1103/7mv6-4g91","url":null,"abstract":"<p><p>Spontaneous symmetry breaking is one of the central organizing principles in physics. Time crystals have emerged as an exotic phase of matter, spontaneously breaking the time translational symmetry, and are mainly categorized as discrete or continuous. While these distinct types of time crystals have been extensively explored as stand-alone systems, intriguing effects can arise from their mutual interaction. Here, we demonstrate that a time-independent coupled system of discrete and continuous time crystals induces a simultaneous twofold temporal symmetry breaking, resulting in a hierarchical time crystal phase. Interestingly, one of the subsystems breaks a discrete temporal symmetry that is absent from the time-independent Liouvillian generating the dynamics, but instead emerges dynamically, giving rise to a convoluted nonequilibrium phase. We demonstrate that hierarchical time crystals are robust, emerging for fundamentally different coupling schemes and persisting across wide ranges of system parameters.</p>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"137 13","pages":"130402"},"PeriodicalIF":9.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149149365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sofie Castro Holbæk,Morten H. Christensen,Andreas Kreisel,Brian M. Andersen
{"title":"Protection of Unconventional Superconductivity from Disorder","authors":"Sofie Castro Holbæk,Morten H. Christensen,Andreas Kreisel,Brian M. Andersen","doi":"10.1103/3cn5-hb8z","DOIUrl":"https://doi.org/10.1103/3cn5-hb8z","url":null,"abstract":"","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"9 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"First evidence of neutrino absorption on argon using 8 B solar neutrinos in DEAP-3600","authors":"","doi":"10.1103/ss4t-vqxr","DOIUrl":"https://doi.org/10.1103/ss4t-vqxr","url":null,"abstract":"","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"19 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149043611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Emil J. Bjerrum-Bohr,Gang Chen,Carl Jordan Eriksen,Nabha Shah
{"title":"From the Gravitational Compton Amplitude to Black Hole Perturbation Theory","authors":"N. Emil J. Bjerrum-Bohr,Gang Chen,Carl Jordan Eriksen,Nabha Shah","doi":"10.1103/f939-mjhj","DOIUrl":"https://doi.org/10.1103/f939-mjhj","url":null,"abstract":"We employ a single worldline effective field theory in a Schwarzschild-Tangherlini background to compute the gravitational Compton amplitude up to third post-Minkowskian order. After excising the infrared divergences associated with the Weinberg phase, we establish a direct and exact map to results in black hole perturbation theory with a natural resummation and regularization of the forward divergences of the Compton amplitude. We also outline possible applications of this useful computational bridge for Compton amplitudes that include spin and tidal effects.","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"31 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Radiative Corrections to Inverse Beta Decay: Precision Analysis for Reactor Neutrinos","authors":"Oleksandr Tomalak","doi":"10.1103/zbcz-nkpd","DOIUrl":"https://doi.org/10.1103/zbcz-nkpd","url":null,"abstract":"We present a complete calculation of radiative corrections to the inverse beta decay reaction, ν ¯ e + p → e + + n , at reactor antineutrino energies using heavy-baryon chiral perturbation theory. Our analysis consistently incorporates quantum electrodynamics, chromodynamics, and electroweak contributions for the first time within this framework. We provide updated, high-precision cross-section predictions with a full error budget and present the positron energy spectrum, including radiative effects. The results are essential for normalizing the reactor antineutrino flux, determining neutrino oscillation parameters with subpercent accuracy, and searching for new physics at nuclear power plants.","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"75 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149050170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Superparamagnetism in an interacting nanomagnet array: A tale of three temperatures","authors":"","doi":"10.1103/f92d-w6fn","DOIUrl":"https://doi.org/10.1103/f92d-w6fn","url":null,"abstract":"","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"397 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149043479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}