Physical review letters最新文献

{"title":"Tuning Transport in Solid-State Bose-Fermi Mixtures by Feshbach Resonances","authors":"Caterina Zerba, Clemens Kuhlenkamp, Léo Mangeolle, Michael Knap","doi":"10.1103/physrevlett.134.126502","DOIUrl":"https://doi.org/10.1103/physrevlett.134.126502","url":null,"abstract":"Transition-metal-dichalcogenide heterostructures have emerged as promising platforms for realizing tunable Bose–Fermi mixtures. Their constituents are fermionic charge carriers resonantly coupled to long-lived bosonic interlayer excitons, allowing them to form trion bound states. Such platforms promise to achieve comparable densities of fermions and bosons at low relative temperatures. Here, we predict the transport properties of correlated Bose–Fermi mixtures close to a narrow solid-state Feshbach resonance. When driving a hole current, the responses of doped holes, excitons, and trions are significantly modified by the resonant interactions, leading to deviations from the typical Drude behavior and to a sign change of the exciton drag. Our results on the temperature-dependent resistivities demonstrate that near resonance interaction effects dominate over established conventional scattering mechanisms in these solid-state Bose–Fermi mixtures. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"29 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713378","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":"Direct Observation of Time-Dependent Coherent Chiral Tunneling Dynamics","authors":"Wenhao Sun, Denis S. Tikhonov, Melanie Schnell","doi":"10.1103/physrevlett.134.123403","DOIUrl":"https://doi.org/10.1103/physrevlett.134.123403","url":null,"abstract":"Superpositions of handed molecular states give rise to achiral eigenstates, delocalized across a double-well potential via tunneling. A coherent superposition of these energy eigenstates could dynamically relocalize the molecules into chiral states, which has only been addressed theoretically. Here, we present a microwave pump-probe study to create and probe coherent chiral tunneling dynamics in a given rotational state. Through a time-resolved scheme, we uncover the periodic time evolution of the induced chiral wave packet under field-free conditions. Moreover, we demonstrate precise phase control of this coherence via phase modulation during pump excitation. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"61 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713381","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":"Cooperativity of Confined Nematic Microswimmers: From One to Many","authors":"Shubhadeep Mandal, Thomas J. Mason, Anthony C. Croft, Marco G. Mazza","doi":"10.1103/physrevlett.134.128302","DOIUrl":"https://doi.org/10.1103/physrevlett.134.128302","url":null,"abstract":"Controlling the behavior of microswimmers is a major challenge to extract work for novel active matter applications. Geometric confinement is often used for controlling soft matter systems. However, in comparison to the case of Newtonian fluids, the effects of solid interfaces on microswimmers moving through an anisotropic fluid are far less understood. By means of nematic multiparticle collision dynamics simulations and analytical modeling, we investigate the dynamical behavior of swimmers immersed in a nematic liquid crystal and confined by solid walls. For isolated squirmers, we find a rich phase diagram including oscillatory dynamics for weak pushers, depending on the strength of their propulsion and degree of confinement. Our theoretical model shows that, unlike in the isotropic case, in a nematic fluid, force dipole, source dipole, and source quadrupole singularities all are required for the onset of oscillations. Increasing the number of squirmers shows the emergence of cooperativity in pusher-type squirmers, while pullers’ flow fields hinder each other’s motion. The interplay of nematodynamic torque, wall-induced elastic repulsion, and active flows thus offers the opportunity for both control and transport in active nematic systems. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"28 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713379","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":"g Factor of Boronlike Tin","authors":"J. Morgner, B. Tu, M. Moretti, C. M. König, F. Heiße, T. Sailer, V. A. Yerokhin, B. Sikora, N. S. Oreshkina, Z. Harman, C. H. Keitel, S. Sturm, K. Blaum","doi":"10.1103/physrevlett.134.123201","DOIUrl":"https://doi.org/10.1103/physrevlett.134.123201","url":null,"abstract":"In the experiment, the g</a:mi></a:math> factor of boronlike <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mrow><c:mmultiscripts><c:mrow><c:msup><c:mrow><c:mi>Sn</c:mi></c:mrow><c:mrow><c:mn>45</c:mn><c:mo>+</c:mo></c:mrow></c:msup></c:mrow><c:mprescripts/><c:none/><c:mrow><c:mn>118</c:mn></c:mrow></c:mmultiscripts></c:mrow></c:math> has been measured with a 0.5 ppb uncertainty. This is the first high-precision measurement of the <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mrow><e:mi>g</e:mi></e:mrow></e:math> factor of a heavy boronlike ion. The measured value of 0.6 447 038 265(4) is consistent with the presented state-of-the-art theory calculations, which predict a value of 0.64 470 29(8). So far, the only boronlike ion of which the <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mrow><g:mi>g</g:mi></g:mrow></g:math> factor was measured with high precision has been <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mrow><i:mmultiscripts><i:mrow><i:msup><i:mrow><i:mi>Ar</i:mi></i:mrow><i:mrow><i:mn>13</i:mn><i:mo>+</i:mo></i:mrow></i:msup></i:mrow><i:mprescripts/><i:none/><i:mrow><i:mn>40</i:mn></i:mrow></i:mmultiscripts></i:mrow></i:math>. The measurement presented here therefore tests quantum electrodynamics as well as many-electron interactions at much higher <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:mi>Z</k:mi></k:math>. Furthermore, we discuss the potential for an independent determination of the fine-structure constant <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mi>α</m:mi></m:math>, which can be achieved with a specific difference of <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>g</o:mi></o:math> factors, combining the presented results with the recent electron <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:mi>g</q:mi></q:math>-factor measurement of hydrogenlike tin. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"61 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695346","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":"Anomalous Hall Effect due to Magnetic Fluctuations in a Ferromagnetic Weyl Semimetal","authors":"Ola Kenji Forslund, Xiaoxiong Liu, Soohyeon Shin, Chun Lin, Masafumi Horio, Qisi Wang, Kevin Kramer, Saumya Mukherjee, Timur Kim, Cephise Cacho, Chennan Wang, Tian Shang, Victor Ukleev, Jonathan S. White, Pascal Puphal, Yasmine Sassa, Ekaterina Pomjakushina, Titus Neupert, Johan Chang","doi":"10.1103/physrevlett.134.126602","DOIUrl":"https://doi.org/10.1103/physrevlett.134.126602","url":null,"abstract":"The anomalous Hall effect (AHE) has emerged as a key indicator of time-reversal symmetry breaking (TRSB) and topological features in electronic band structures. Absent of a magnetic field, the AHE requires spontaneous TRSB but has proven hard to probe due to averaging over domains. The anomalous component of the Hall effect is thus frequently derived from extrapolating the magnetic field dependence of the Hall response. We show that discerning whether the AHE is an intrinsic property of the field-free system becomes intricate in the presence of strong magnetic fluctuations. As a study case, we use the Weyl semimetal PrAlGe, where TRSB can be toggled via a ferromagnetic transition, providing a transparent view of the AHE’s topological origin. Through a combination of thermodynamic, transport, and muon spin relaxation measurements, we contrast the behavior below the ferromagnetic transition temperature to that of strong magnetic fluctuations above. Our results on PrAlGe provide general insights into the interpretation of anomalous Hall signals in systems where TRSB is debated, such as families of kagome metals or certain transition metal dichalcogenides. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695415","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":"New Physics Decaying into Metastable Particles: Impact on Cosmic Neutrinos","authors":"Kensuke Akita, Gideon Baur, Maksym Ovchynnikov, Thomas Schwetz, Vsevolod Syvolap","doi":"10.1103/physrevlett.134.121001","DOIUrl":"https://doi.org/10.1103/physrevlett.134.121001","url":null,"abstract":"We investigate decays of hypothetical unstable new physics particles into metastable species such as muons, pions, or kaons in the early Universe, when temperatures are in the MeV range, and study how they affect cosmic neutrinos. We demonstrate that the nontrivial dynamics of metastables in the plasma alters the impact of the new physics particles on the neutrino population, including the effective number of neutrino degrees of freedom, N</a:mi></a:mrow>eff</a:mi></a:mrow></a:msub></a:mrow></a:math>, modifies neutrino spectral distortions, and may induce asymmetries in neutrino and antineutrino energy distributions. These modifications have important implications for observables such as big bang nucleosynthesis and the cosmic microwave background, especially in light of upcoming cosmic microwave background observations aiming to reach percent-level precision on <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msub><c:mi>N</c:mi><c:mi>eff</c:mi></c:msub></c:math>. We illustrate our findings with a few examples of new physics particles and provide a computational tool available for further exploration. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"61 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695416","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":"New Method for the Astrometric Direct Detection of Ultralight Dark Matter","authors":"Jeff A. Dror, Sarunas Verner","doi":"10.1103/physrevlett.134.111003","DOIUrl":"https://doi.org/10.1103/physrevlett.134.111003","url":null,"abstract":"Ultralight dark matter induces time-dependent perturbations in the spacetime metric, enabling its . In this Letter, we propose using astrometry to detect dark matter. After reviewing the calculation of the metric in the presence of scalar dark matter, we study the influence of the perturbations on the apparent motion of astrophysical bodies. We apply our results to angular position measurements of quasars, whose vast distances from Earth present an opportunity to discover subcomponent dark matter with a mass as low as 10</a:mn>−</a:mo>33</a:mn></a:mrow></a:msup></a:mtext></a:mtext>eV</a:mi></a:math>. We explore the prospects of very long baseline interferometry and optical astrometric survey measurements for detecting ultralight relics, finding that for the smallest masses, current astrometric surveys can detect dark matter moving locally with a velocity of <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>3</c:mn></c:mrow></c:msup></c:math> with energy density as low as <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mn>3</e:mn><e:mo>×</e:mo><e:msup><e:mn>10</e:mn><e:mrow><e:mo>−</e:mo><e:mn>11</e:mn></e:mrow></e:msup><e:mtext> </e:mtext><e:mtext> </e:mtext><e:mi>GeV</e:mi><e:mo>/</e:mo><e:msup><e:mi>cm</e:mi><e:mn>3</e:mn></e:msup></e:math>. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"13 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672402","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":"Engineering Dipole-Dipole Couplings for Enhanced Cooperative Light-Matter Interactions","authors":"Adam Burgess, Madeline C. Waller, Erik M. Gauger, Robert Bennett","doi":"10.1103/physrevlett.134.113602","DOIUrl":"https://doi.org/10.1103/physrevlett.134.113602","url":null,"abstract":"Cooperative optical effects are enabled and controlled by interactions between molecular dipoles, meaning that their mutual orientation is of paramount importance to, for example, superabsorbing light-harvesting antennas. Here we show how to move beyond the possibilities of simple geometric tailoring, demonstrating how a metallic sphere placed within a ring of parallel dipoles engineers an effective Hamiltonian that generates “guide-sliding” states within the ring system. This allows steady-state superabsorption in noisy room temperature environments, outperforming previous designs while being significantly simpler to implement. As exemplified by this showcase, our approach represents a powerful design paradigm for tailoring cooperative light-matter effects in molecular structures that extends beyond superabsorbing systems to a huge array of quantum energy transport systems. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"16 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672403","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":"One-Loop N -Point Correlators in Pure Gravity","authors":"Humberto Gomez, Renann Lipinski Jusinskas, Cristhiam Lopez-Arcos, Alexander Quintero Vélez","doi":"10.1103/physrevlett.134.111602","DOIUrl":"https://doi.org/10.1103/physrevlett.134.111602","url":null,"abstract":"In this Letter we propose a simple algebraic recursion for the complete one-loop integrands of N</a:mi></a:math>-graviton correlators. This formula automatically yields the correct symmetry factors of individual diagrams, taking into account both the graviton and the ghost loop, and seamlessly controlling the related combinatorics. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"19 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666632","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":"Topological Portal to the Dark Sector","authors":"Joe Davighi, Admir Greljo, Nudžeim Selimović","doi":"10.1103/physrevlett.134.111804","DOIUrl":"https://doi.org/10.1103/physrevlett.134.111804","url":null,"abstract":"We propose a unique topological portal between quantum chromodynamics (QCD) and a dark sector characterized by a global symmetry breaking, which connects three QCD to two dark pions. When gauged, it serves as the leading portal between the two sectors, providing an elegant, self-consistent scenario of light thermal inelastic dark matter. The inherent antisymmetrization leads to diminished annihilations at later times and suppressed direct detection. However, novel collider signatures offer tremendous prospects for discovery at Belle II. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666658","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}