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  • Journal article
    Isichei R, Magueijo J, 2025,

    Thermodynamics in spacetimes without horizons

    , PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010
  • Journal article
    Liu X, Reall HS, Santos J, Wiseman Tet al., 2025,

    Ill-posedness of the Cauchy problem for linearized gravity in a cavity with conformal boundary conditions

    , Classical and Quantum Gravity, ISSN: 0264-9381

    <jats:title>Abstract</jats:title> <jats:p>We consider Lorentzian General Relativity in a cavity with a timelike boundary, with conformal boundary conditions and also a generalization of these boundary conditions. We focus on the linearized gravitational dynamics about the static empty cavity whose boundary has spherical spatial geometry. It has been recently shown that there exist dynamical instabilities, whose angular dependence is given in terms of spherical harmonics Y m , and whose coefficient of exponential growth in time goes as ∼ 1/3 . We use these modes to construct a sequence of solutions for which the initial data converge to zero as → ∞ but for which the solution itself does not converge to zero. This implies a lack of continuity of solutions on initial data, which shows that the initial value problem with these boundary conditions is not well-posed. This is in tension with recent mathematical work on well-posedness for such boundary conditions.</jats:p>
  • Journal article
    Dowker F, Liu R, Lloyd-Jones D, 2025,

    Timelike boundary and corner terms in the causal set action

    , CLASSICAL AND QUANTUM GRAVITY, Vol: 42, ISSN: 0264-9381
  • Journal article
    de Rham C, Jazayeri S, Tolley AJ, 2025,

    Bispectrum islands: Bootstrap bounds on cosmological correlators

    , PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010
  • Journal article
    Chester SM, Mouland R, van Muiden J, 2025,

    Extremal couplings, graviton exchange, and gluon scattering in AdS

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Gkountoumis G, Hull C, Nian G-E, Vandoren Set al., 2025,

    Duality and infinite distance limits in asymmetric freely acting orbifolds

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Dowker F, 2025,

    Unifying gravity and quantum theory requires better understanding of time

    , NATURE, Vol: 645, Pages: 32-34, ISSN: 0028-0836
  • Journal article
    Hull CM, 2025,

    Monopoles, Dirac strings and generalised symmetries

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Beccaria M, Roiban R, Tseytlin AA, 2025,

    2-loop scattering on superstring and supermembrane in flat space

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Tseytlin AA, Wang Z, 2025,

    On world-sheet S-matrix of NSR string in static gauge

    , NUCLEAR PHYSICS B, Vol: 1018, ISSN: 0550-3213
  • Journal article
    Borsten L, Duff MJ, Kanakaris D, Kim Het al., 2025,

    Duality anomalies in linearized gravity

    , PHYSICAL REVIEW D, Vol: 112, ISSN: 2470-0010
  • Journal article
    Chester SM, Ferrero P, Pavarini DR, 2025,

    Modular invariant gluon-graviton scattering in AdS at one loop

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Elder B, Mentasti G, Pasatembou E, Baynham CFA, Buchmueller O, Contaldi CR, de Rham C, Hobson R, Tolley AJet al., 2025,

    Prospects for detecting new dark physics with the next generation of atomic clocks

    , Physical Review D, Vol: 112, ISSN: 2470-0010

    Wide 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.
  • Journal article
    Genolini PB, Gauntlett JP, Jiao Y, Lüscher A, Sparks Jet al., 2025,

    Equivariant localization for D = 4 gauged supergravity

    , The Journal of High Energy Physics, Vol: 2025, Pages: 0-78, ISSN: 1029-8479

    We 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.
  • Journal article
    Isichei R, Magueijo J, 2025,

    Attractive voids

    , INTERNATIONAL JOURNAL OF MODERN PHYSICS D, Vol: 34, ISSN: 0218-2718
  • Journal article
    Chester SM, Komargodski Z, 2025,

    Symmetry enhancement, symmetry-protected topological absorption, and duality in QED3

    , PHYSICAL REVIEW B, Vol: 112, ISSN: 2469-9950
  • Journal article
    Chester SM, Dempsey R, Pufu SS, 2025,

    Higher-derivative corrections in M-theory from precision numerical bootstrap

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Bassani 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 article
    Bennett S, Hanany A, Kumaran G, Li C, Liu D, Sperling Met al., 2025,

    Quiver subtraction on the Higgs branch

    , NUCLEAR PHYSICS B, Vol: 1016, ISSN: 0550-3213
  • Journal article
    Albertini 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
  • Journal article
    Kozuszek J, Wiseman T, 2025,

    Well-posedness of minimal dRGT massive gravity

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Chester 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>&gt;</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
  • Journal article
    Mentasti 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: 1475-7516

    We 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.
  • Journal article
    Webb JK, Lee C-C, Milakovic D, Flambaum VV, Dzuba VA, Magueijo Jet al., 2025,

    The mystery of alpha and the isotopes (vol 539, pg L1, 2025)

    , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Vol: 540, Pages: L13-L13, ISSN: 0035-8711
  • Journal article
    Beccaria 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 article
    Chen CY-R, Joung E, Mkrtchyan K, Yoon Jet al., 2025,

    Higher-order chiral scalar from boundary reduction of 3d higher-spin gravity

    , JOURNAL OF HIGH ENERGY PHYSICS
  • Journal article
    Bassani PM, Magueijo J, 2025,

    How to make a universe

    , PHYSICAL REVIEW D, Vol: 111, ISSN: 2470-0010
  • Journal article
    Chester 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
  • Journal article
    Magueijo J, Manchanda GS, 2025,

    Quantum wormholes at spatial infinity

    , PHYSICS LETTERS B, Vol: 864, ISSN: 0370-2693
  • Journal article
    Garbrecht B, Ghoderao PS, Rajantie A, 2025,

    Curvature perturbations from vacuum transition during inflation

    , JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516

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