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  • Journal article
    Hull CM, Lindstrom UG, Velasquez Cotini Hutt ML, 2025,

    Gravitational currents and charges from conformal Killing-Yano tensors

    , Classical and Quantum Gravity, ISSN: 0264-9381

    <jats:title>Abstract</jats:title> <jats:p>We construct a set of higher-form conserved currents on spacetimes admitting conformal Killing-Yano tensors. We find relations between these currents that allow the charge given by integrating one of these currents over a region to be re-expressed as an integral of a covariant quantity over the boundary. In many cases, only a non-covariant form of the boundary integral was previously known. For a special class of these currents the conservation does not rely on field equations, so they give conserved topological charges in any gravitational theory. We discuss the relation of our currents to the Komar current and derive several new properties of conformal Killing-Yano tensors. We study a number of applications of our construction to charges of black hole solutions of Einstein-Maxwell theory, and D-brane solutions of type II supergravity.</jats:p>
  • Journal article
    Liu X, Reall HS, Santos JE, Wiseman Tet al., 2025,

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

    , Classical and Quantum Gravity, Vol: 42, Pages: 235003-235003, 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 <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi>Y</mml:mi> <mml:mrow> <mml:mi>ℓ</mml:mi> <mml:mi>m</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> </jats:inline-formula> , and whose coefficient of exponential growth in time goes as <jats:inline-formula> <jats:tex-math> </jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mo>∼</mml:mo> <mml:msup> <mml:mi>ℓ</mml:mi> <mml:mrow> <mml:mn>1</mml:mn>
  • Journal article
    Bennett S, Hanany A, Kumaran G, 2025,

    Orthosymplectic quotient quiver subtraction. Part II. Framed quivers

    , Journal of High Energy Physics, Vol: 2025

    The technique of orthosymplectic quotient quiver subtraction is introduced for framed orthosymplectic quivers. This involves subtracting an orthosymplectic quotient quiver from a framed orthosymplectic 3dN = 4 quiver gauge theory which has the effect of gauging an SO(n) or Sp(n) subgroup of the IR Coulomb branch global symmetry with complete Higgsing. The orthosymplectic quotient quivers take the form of magnetic quivers for class S theories on cylinders with (twisted) maximal punctures of simply laced algebras, similar to the case of unitary quotient quiver subtraction. This gives a set of quotient quivers for all classical groups. Notably, quotient quiver subtraction for framed and unframed orthosymplectic quivers are different procedures.
  • Journal article
    Isichei R, Magueijo J, 2025,

    Thermodynamics in spacetimes without horizons

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

    We consider the energetics and thermodynamics of spacetimes with no horizons, but endowed with a preferred timelike junction surface. They could arise as a limiting case of the gravastar and other constructions regularizing the interior of the horizon of a black hole, or from the conceptual cutting of a portion of a nonasymptotically flat space and gluing it with flat space. We find that such surfaces can be made to have zero energy, so that the energetics of such spaces is not encumbered by them. They do have a transverse pressure, fixed by the jump in surface gravity. A peculiar matter thermodynamics then follows, with well-defined entropy, temperature, and surface pressure, constrained by specific relations arising from the zero energy condition. This is confirmed by the Euclidean path integral, with the proviso that the Tolman-Ehrenfest temperature should be used. The entropy of the space is then the area of the timelike surface in units of a fundamental area, and the matter temperature is proportional to the transverse pressure and so the jump in surface gravity. However, when the gravitational action is added, the free energy of the surface is also zero. The fact that for some such spaces the temperature comes out negative raises interesting questions regarding the third “law” of thermodynamics.
  • 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
    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
    Beccaria M, Roiban R, Tseytlin AA, 2025,

    2-loop scattering on superstring and supermembrane in flat space

    , JOURNAL OF HIGH ENERGY PHYSICS
  • 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
    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
    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
    Webb JK, Lee C-C, Milakovic D, Flambaum VV, Dzuba VA, Magueijo Jet 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 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
    Bassani PM, Magueijo J, 2025,

    How to make a universe

    , PHYSICAL REVIEW D, Vol: 111, ISSN: 2470-0010
  • 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
    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

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