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Journal articleBorsten L, Duff MJ, Kanakaris D, et al., 2025,
Duality anomalies in linearized gravity
, PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010- Cite
- Citations: 1
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Journal articleChester SM, Ferrero P, Pavarini DR, 2025,
Modular invariant gluon-graviton scattering in AdS at one loop
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleElder B, Mentasti G, Pasatembou E, et al., 2025,
Prospects for detecting new dark physics with the next generation of atomic clocks
, Physical Review D, Vol: 112, ISSN: 2470-0010Wide classes of new fundamental physics theories cause apparent variations in particle mass ratios in space and time. In theories that violate the weak equivalence principle (EP), those variations are not uniform across all particles and may be detected with atomic and molecular clock frequency comparisons. In this work we explore the potential to detect those variations with near-future clock comparisons. We begin by searching published clock data for variations in the electron-proton mass ratio. We then undertake a statistical analysis to model the noise in a variety of clock pairs that can be built in the near future according to the current state of the art, determining their sensitivity to various fundamental physics signals. Those signals are then connected to constraints on fundamental physics theories that lead directly or indirectly to an effective EP-violating, including those motivated by dark matter, dark energy, the vacuum energy problem, unification or other open questions of fundamental physics. This work results in projections for tight new bounds on fundamental physics that could be achieved with atomic and molecular clocks within the next few years. Our code for this work is packaged into a forecast tool that translates clock characteristics into bounds on fundamental physics.
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Journal articleAbitbol M, Abril-Cabezas I, Adachi S, et al., 2025,
The Simons Observatory: science goals and forecasts for the enhanced Large Aperture Telescope
, Journal of Cosmology and Astroparticle Physics, Vol: 2025, ISSN: 1475-7516We describe updated scientific goals for the wide-field, millimeter-wave survey that will be produced by the Simons Observatory (SO). Significant upgrades to the 6-meter SO Large Aperture Telescope (LAT) are expected to be complete by 2028, and will include a doubled mapping speed with 30,000 new detectors and an automated data reduction pipeline. In addition, a new photovoltaic array will supply most of the observatory's power. The LAT survey will cover about 60% of the sky at a regular observing cadence, with five times the angular resolution and ten times the map depth of the Planck satellite. The science goals are to: (1) determine the physical conditions in the early universe and constrain the existence of new light particles; (2) measure the integrated distribution of mass, electron pressure, and electron momentum in the late-time universe, and, in combination with optical surveys, determine the neutrino mass and the effects of dark energy via tomographic measurements of the growth of structure at redshifts z ≲ 3; (3) measure the distribution of electron density and pressure around galaxy groups and clusters, and calibrate the effects of energy input from galaxy formation on the surrounding environment; (4) produce a sample of more than 30,000 galaxy clusters, and more than 100,000 extragalactic millimeter sources, including regularly sampled AGN light-curves, to study these sources and their emission physics; (5) measure the polarized emission from magnetically aligned dust grains in our Galaxy, to study the properties of dust and the role of magnetic fields in star formation; (6) constrain asteroid regoliths, search for Trans-Neptunian Objects, and either detect or eliminate large portions of the phase space in the search for Planet 9; and (7) provide a powerful new window into the transient universe on time scales of minutes to years, concurrent with observations from the Vera C. Rubin Observatory of overlapping sky.
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Journal articleGenolini PB, Gauntlett JP, Jiao Y, et al., 2025,
Equivariant localization for D = 4 gauged supergravity
, The Journal of High Energy Physics, Vol: 2025, Pages: 0-78, ISSN: 1029-8479We consider supersymmetric solutions of D = 4, N = 2 Euclidean gauged supergravity coupled to an arbitrary number of vector multiplets. Such solutions admit an R-symmetry Killing vector, ξ, constructed as a bilinear in the Killing spinor. The Killing spinor bilinears can also be used to construct polyforms that are equivariantly closed under the action of the equivariant exterior derivative d<inf>ξ</inf> = d – ξ⌟. This allows one to compute various flux integrals and the on-shell action using localization, without solving any supergravity equations, just assuming the supersymmetric solutions exist. The flux integrals allow one to obtain important UV-IR relations, relating fixed point data in the bulk to data on the asymptotic AdS boundary, allowing one to express the gravitational free energy in terms of boundary SCFT data. We illustrate the formalism with a number of examples, including classes of solutions which are unlikely to be ever constructed in closed form.
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Journal articleIsichei R, Magueijo J, 2025,
Attractive voids
, INTERNATIONAL JOURNAL OF MODERN PHYSICS D, Vol: 34, ISSN: 0218-2718 -
Journal articleChester SM, Komargodski Z, 2025,
Symmetry enhancement, symmetry-protected topological absorption, and duality in QED3
, PHYSICAL REVIEW B, Vol: 112, ISSN: 2469-9950- Cite
- Citations: 1
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Journal articleChester SM, Dempsey R, Pufu SS, 2025,
Higher-derivative corrections in M-theory from precision numerical bootstrap
, JOURNAL OF HIGH ENERGY PHYSICS- Cite
- Citations: 1
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Journal articleBennett S, Hanany A, Kumaran G, et al., 2025,
Quiver subtraction on the Higgs branch
, NUCLEAR PHYSICS B, Vol: 1016, ISSN: 0550-3213- Cite
- Citations: 3
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Journal articleBassani P, Magueijo J, Mukohyama S, 2025,
Violations of energy conservation in Horava-Lifshitz gravity: a new ingredient in the dark matter puzzle
, JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516 -
Journal articleAlbertini E, Platt D, Wiseman T, 2025,
Towards a uniqueness theorem for static black holes in Kaluza-Klein theory with small circle size
, JOURNAL OF HIGH ENERGY PHYSICS- Cite
- Citations: 2
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Journal articleKozuszek J, Wiseman T, 2025,
Well-posedness of minimal dRGT massive gravity
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleChester SM, Su N, 2025,
Upper critical dimension of the 3-state Potts model
, Physical Review D, Vol: 111, ISSN: 2470-0010<jats:p>We consider the 3-state Potts model in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>d</a:mi><a:mo>≥</a:mo><a:mn>2</a:mn></a:math> dimensions. For <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>d</c:mi></c:math> less than the upper critical dimension <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:msub><e:mi>d</e:mi><e:mrow><e:mi>crit</e:mi></e:mrow></e:msub></e:math>, the model has a critical and a tricritical fixed point. In <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mi>d</g:mi><g:mo>=</g:mo><g:mn>2</g:mn></g:math>, these fixed points are described by minimal models, and so are exactly solvable. For <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:mi>d</i:mi><i:mo>></i:mo><i:mn>2</i:mn></i:math>, however, strong coupling makes them difficult to study and there is no consensus on the value of <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:msub><k:mi>d</k:mi><k:mrow><k:mi>crit</k:mi></k:mrow></k:msub></k:math>. We use the numerical conformal bootstrap to compute critical exponents of both the critical and tricritical fixed points for general <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:mi>d</m:mi></m:math>. In <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mi>d</o:mi><o:mo>=</o:mo><o:mn>2</o:mn></o:math> our results ma
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Journal articleMentasti G, Contaldi C, 2025,
Cosmic shimmering: the gravitational wave signal of time-resolved cosmic shear observations
, Journal of Cosmology and Astroparticle Physics, Vol: 2025, ISSN: 1475-7516We introduce a novel approach for detecting gravitational waves through their influence on the shape of resolved astronomical objects. This method, complementary to pulsar timing arrays and astrometric techniques, explores the time-dependent distortions caused by gravitational waves on the shapes of celestial bodies, such as galaxies or any resolved extended object. By developing a formalism based on that adopted in the analysis of weak lensing effects, we derive the response functions for gravitational wave-induced distortions and compute their angular correlation functions. Our results highlight the sensitivity of these distortions to the lowest frequencies of the gravitational wave spectrum and demonstrate how they produce distinct angular correlation signatures, including null and polarisation-sensitive correlations. These findings pave the way for future high-resolution surveys to exploit this novel observable, potentially offering new insights into the stochastic gravitational wave background and cosmological models.
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Journal articleWebb JK, Lee C-C, Milakovic D, et al., 2025,
Correction to: The mystery of alpha and the isotopes
, Monthly Notices of the Royal Astronomical Society, Vol: 540, Pages: L13-L13, ISSN: 0035-8711 -
Journal articleBeccaria M, Kurlyand SA, Tseytlin AA, 2025,
On non-planar ABJM anomalous dimensions from M2 branes in AdS<sub>4</sub> x <i>S</i><SUP>7</SUP>/ℤ<sub><i>k</i></sub>
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleChen CY-R, Joung E, Mkrtchyan K, et al., 2025,
Higher-order chiral scalar from boundary reduction of 3d higher-spin gravity
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleBassani PM, Magueijo J, 2025,
How to make a universe
, PHYSICAL REVIEW D, Vol: 111, ISSN: 2470-0010 -
Journal articleChester SM, Hansen T, Zhong D-L, 2025,
The type IIA Virasoro-Shapiro amplitude in AdS<sub>4</sub> x CP<SUP>3</SUP> from ABJM theory
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479- Cite
- Citations: 6
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Journal articleGarbrecht B, Ghoderao PS, Rajantie A, 2025,
Curvature perturbations from vacuum transition during inflation
, Journal of Cosmology and Astroparticle Physics, Vol: 2025, ISSN: 1475-7516We demonstrate that in the presence of a light scalar spectator field, vacuum transitions taking place during inflation can produce large, potentially detectable non-Gaussian signatures in the primordial curvature perturbation. Such transitions are common in theories with multiple scalar fields when the potential has several minima. Our computation proceeds by numerically finding the instanton solution that describes quantum tunnelling between vacuum states in a de Sitter background, calculating its dependence on the spectator field and, thereby, its effect on the expansion of space. For a scenario with Higgs inflation, we obtain the non-Gaussianity parameter fNL ∼ O(10) and study its parameter dependence.
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Journal articleWebb JK, Lee C-C, Milakovic D, et al., 2025,
The mystery of alpha and the isotopes
, Monthly Notices of the Royal Astronomical Society, Vol: 539, Pages: L1-L6, ISSN: 0035-8711We report unbiased Artificial Intelligence (AI) measurements of the fine structure constant α in two proximate absorption regionsin the spectrum of the quasar HE0515−4414. The data are high resolution, high signal to noise, and laser frequency combcalibrated, obtained using the Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations (ESPRESSO)spectrograph on the VLT. The high quality of the data and proximity of the regions motivate a differential comparison, exploringthe possibility of spatial variations of fundamental constants, as predicted in some theories. We show that if the magnesiumisotopic relative abundances are terrestrial, the fine structure constants in these two systems differ at the 7σ level. A 3σdiscrepancy between the two measurements persists even for the extreme non-terrestrial case of 100 per cent 24Mg, if shared byboth systems. However, if Mg isotopic abundances take independent values in these two proximate systems, one terrestrial, theother with no heavy isotopes, both can be reconciled with a terrestrial α, and the discrepancy between the two measurementsfalls to 2σ. We cannot rule out other systematics that are unaccounted for in our study that could masquerade as a varyingalpha signal. We discuss varying constant and varying isotope interpretations and resolutions to this conundrum for future highprecision measurements.
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Journal articleMagueijo J, Manchanda GS, 2025,
Quantum wormholes at spatial infinity
, PHYSICS LETTERS B, Vol: 864, ISSN: 0370-2693- Cite
- Citations: 1
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Journal articleBeccaria M, Tseytlin AA, 2025,
Non-planar corrections to ABJM Bremsstrahlung function from quantum M2 brane
, JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, Vol: 58, ISSN: 1751-8113- Cite
- Citations: 1
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Journal articleChester SM, Zhong D-L, 2025,
AdS3 x S3 Virasoro-Shapiro Amplitude with Ramond-Ramond Flux
, PHYSICAL REVIEW LETTERS, Vol: 134, ISSN: 0031-9007- Cite
- Citations: 4
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Journal articleHull C, Hutt ML, Lindstrom U, 2025,
Generalised symmetries in linear gravity
, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479- Cite
- Citations: 2
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Journal articleAbdalla A, Abe M, Abend S, et al., 2025,
Terrestrial Very-Long-Baseline Atom Interferometry: summary of the second workshop
, EPJ Quantum Technology, Vol: 12, ISSN: 2196-0763This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024 (Second Terrestrial Very-Long-Baseline Atom Interferometry Workshop, Imperial College, April 2024), building on the initial discussions during the inaugural workshop held at CERN in March 2023 (First Terrestrial Very-Long-Baseline Atom Interferometry Workshop, CERN, March 2023). Like the summary of the first workshop (Abend et al. in AVS Quantum Sci. 6:024701, 2024), this document records a critical milestone for the international atom interferometry community. It documents our concerted efforts to evaluate progress, address emerging challenges, and refine strategic directions for future large-scale atom interferometry projects. Our commitment to collaboration is manifested by the integration of diverse expertise and the coordination of international resources, all aimed at advancing the frontiers of atom interferometry physics and technology, as set out in a Memorandum of Understanding signed by over 50 institutions (Memorandum of Understanding for the Terrestrial Very Long Baseline Atom Interferometer Study).
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Journal articleHo M, Price H, Evans T, et al., 2025,
Enhancing foresight models with network science: measuring innovation feedbacks within the Chain-Linked Model
, Technological Forecasting and Social Change, Vol: 213, ISSN: 0040-1625A granular understanding of innovation dynamics is crucial for forecasting how and when different actors within the innovation system can make valuable contributions. Existing theoretical foundations of the foresight practice are largely qualitative and often oversimplify the innovation process. While foresight practitioners acknowledge the existence of knowledge feedback loops, these feedback loops are rarely quantified systematically in empirical forecasting studies. Innovators and funders tend to choose their dyadic relationships but rarely have visibility over the wider, dynamic innovation network. This study enriches innovation theories for the foresight practice by leveraging multilayer citation networks to explore innovation translation pathways, achieved by integrating data from market entries, clinical trials, patents, publications, funders, and grants over a 70-year period. Our analysis shows shifts in the order, prevalence, and tipping points of translation activities as technologies mature, with granularity not described in previous studies. We also examine the distinct funding patterns of major public and private entities throughout this maturation process, revealing their unique contributions and enriching sociotechnical explanations of innovation processes. This study improves the explainability of technology forecasting through innovation theories by reconstructing micro-technical innovation dynamics from first principles.
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Journal articleHull C, 2025,
Coupling self-dual <i>p</i>-form Gauge fields to self-dual branes
, JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, Vol: 58, ISSN: 1751-8113 -
Journal articleAkhond M, Arias-Tamargo G, Carta F, et al., 2025,
On brane systems with O<SUP>+</SUP> planes-5d and 6d SCFTs
, JOURNAL OF HIGH ENERGY PHYSICS -
Journal articleCostantino F, He Y-H, Heyes E, et al., 2025,
Learning 3-manifold triangulations
, Journal of Physics A: Mathematical and Theoretical, Vol: 58, Pages: 095201-095201, ISSN: 1751-8113<jats:title>Abstract</jats:title> <jats:p>Real 3-manifold triangulations can be uniquely represented by isomorphism signatures. Databases of these isomorphism signatures are generated for a variety of 3-manifolds and knot complements, using SnapPy and Regina, then these language-like inputs are used to train various machine learning architectures to differentiate the manifolds, as well as their Dehn surgeries, via their triangulations. Gradient saliency analysis then extracts key parts of this language-like encoding scheme from the trained models. The isomorphism signature databases are taken from the 3-manifolds’ Pachner graphs, which are also generated in bulk for some selected manifolds of focus and for the subset of the SnapPy orientable cusped census with <jats:inline-formula> <jats:tex-math/> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mo><</mml:mo> <mml:mn>8</mml:mn> </mml:mrow> </mml:math> </jats:inline-formula> initial tetrahedra. These Pachner graphs are further analysed through the lens of network science to identify new structure in the triangulation representation; in particular for the hyperbolic case, a relation between the length of the shortest geodesic (systole) and the size of the Pachner graph’s ball is observed.</jats:p>
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