Tootfinder

Spectra for the Vacuum Cherenkov Effect in Astrophysical Electromagnetic Cascades with Lorentz Invariance Violation
Andrey Saveliev, Rafael Alves Batista, Feodor Mishin
https://arxiv.org/abs/2507.08593

Spectra for the Vacuum Cherenkov Effect in Astrophysical Electromagnetic Cascades with Lorentz Invariance Violation
Lorentz invariance violation is a feature of several quantum gravity models in which Lorentz symmetry is broken at high energies, possibly leading to changes in particle behavior and interactions. In this work, we investigate vacuum Cherenkov radiation, a reaction in which an electron spontaneously emits a photon. This process, forbidden when Lorentz symmetry is unbroken, is a phenomenological consequence of some quantum gravity models. We derive, for the first time, the spectra for the vacuum …

Self-gravitating strings and quantum effects in two-dimensional gravity
Akihiro Ishibashi, Yoshinori Matsuo, Akane Tanaka
https://arxiv.org/abs/2506.09586 …

Self-gravitating strings and quantum effects in two-dimensional gravity
It is expected that when the string coupling is taken to be sufficiently small, a black hole turns into a bound state of self-gravitating fundamental strings. This state would be described by winding strings wrapping around the Euclidean time circle, known as the Horowitz-Polchinski solution. In this paper, we study such a self-gravitating string configuration in two-dimensional dilaton gravity theories. We first derive an analytic expression of the solution describing a winding string in two-d…

Quantum Effective Dynamics of Papapetrou Spacetime
Xiaokan Guo, Faqiang Yuan
https://arxiv.org/abs/2506.08821 https://arxiv.org/pdf/2…

Quantum Effective Dynamics of Papapetrou Spacetime
In this paper, we investigate the quantum effective dynamics of Papapetrou spacetime by using methods from loop quantum gravity. The Papapetrou spacetime is an extension of the Schwarzschild spacetime with an extra coupled anti-scalar field. By solving the equations of motion generated by the Hamiltonian constraint for Papapetrou spacetime, we can construct the quantum effective metric. The resulting effective metric for the quantum-corrected Papapetrou spacetime demonstrates the quantum effect…

Particles, Forces and the Early Universe
Risto Raitio
https://arxiv.org/abs/2507.08057 https://arxiv.org/pdf/2507.08057

Particles, Forces and the Early Universe
This article reveals the unexpected result that three a priori distinct ideas--global supersymmetry of preons, Hartle-Hawking cosmology, and Chern-Simons quantum gravity--share common concepts that offer paths beyond the Standard Model. Differences from the MSSM are discussed.

Evolution of tripartite entanglement in three-qubit Quantum Gravity-Induced Entanglement of Masses (QGEM) with quantum decoherence
Pablo Guillermo Carmona Rufo, Anupam Mazumdar, Carlos Sab\'in
https://arxiv.org/abs/2507.01007

Evolution of tripartite entanglement in three-qubit Quantum Gravity-Induced Entanglement of Masses (QGEM) with quantum decoherence
The recently introduced quantum gravity-induced entanglement of masses (QGEM) protocol aims to test the quantum nature of gravity by witnessing the entanglement produced by the virtual exchange of a graviton between two spatially superposed masses. Shortly after the original proposal, further improvements upon the experiment were suggested, including the addition of a third mass, showing that three-qubit setups can be more resilient to higher rates of decoherence caused by the interaction of th…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Holomorphic Unified Field Theory of Gravity and the Standard Model
John. W. Moffat, Ethan. J. Thompson

Compact Temporal Geometry and the $T^2$ Framework for Quantum Gravity
James Hateley
https://arxiv.org/abs/2506.08165 https://arxiv.or…

Compact Temporal Geometry and the $T^2$ Framework for Quantum Gravity
We introduce a two-dimensional temporal framework in which time is represented by a compact manifold $T^2 = (t_1, t_2)$, with $t_1$ encoding classical causal structure and $t_2$ representing quantum coherence. This construction unifies unitary evolution, decoherence, measurement collapse, and gravitational dynamics within a consistent geometric and algebraic formalism. Compactification of the coherence time $t_2$ yields a minimal temporal resolution $Δt_2 \sim \sqrt{α'}$, leading to a discret…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- A new framework for cosmological expansion in a reformulated Newtonian-Like gravity with variable G
Felipe S. Esc\'orcio, J\'ulio C. Fabris, J\'unior D. Toniato, Hermano Velten

Emergent gravity and gravitational lensing in quantum materials
Yugo Onishi, Nisarga Paul, Liang Fu
https://arxiv.org/abs/2506.04335 https://

Emergent gravity and gravitational lensing in quantum materials
We show that an effective gravitational field naturally emerges in quantum materials with long-wavelength spin (or pseudospin) textures. When the itinerant electrons' spin strongly couples to the background spin texture, it effectively behaves as a spinless particle in a curved space, with the curvature arising from quantum corrections to the electron's spin orientation. The emergent gravity gives rise to the electron lensing effect, an analog of the gravitational lensing. Our work shows that n…

This https://arxiv.org/abs/2506.04319 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The Nonperturbative Hilbert Space of Quantum Gravity With One Boundary
We discuss a basis for the nonperturbative Hilbert space of quantum gravity with one asymptotic boundary. We use this basis to show that the Hilbert space for gravity with two disconnected boundaries factorizes into a product of two copies of the single boundary Hilbert space.

Energy Correlators: A Journey From Theory to Experiment
Ian Moult, Hua Xing Zhu
https://arxiv.org/abs/2506.09119 https://arxiv.org/pd…

Energy Correlators: A Journey From Theory to Experiment
Collider experiments offer a unique opportunity to explore the Standard Model (SM), and to search for new physics, new interactions, and new principles of nature. The theoretical abstraction of a collider, namely the study of correlations in asymptotic fluxes, provides one of the most basic examples of an observable in quantum field theory (QFT) and quantum gravity. Energy flux is described in QFT by energy flow operators, a particular example of light-ray operators. In addition to their centra…

Replaced article(s) found for math.PR. https://arxiv.org/list/math.PR/new
[1/1]:
- Liouville quantum gravity from random matrix dynamics
Paul Bourgade, Hugo Falconet

Reverse Physics Rap Battle: String Theory vs Loop Quantum Gravity - 😆
Take the top expert in each of two competing theories, and assign each to defend the other's theory. I can't recall the last time I laughed so hard. Best of all, it's all true and they both know it, but yes, one has had 'promising' results for more decades than the other. 🤣
https://www.youtube.com/watch?v=jEr038WOKFI

Index Theorem and Vortex Kinetics in Bose-Einstein Condensates on a Haldane Sphere with a Magnetic Monopole
Xi-Yu Chen, Lijia Jiang, Tao Yang, Jun-Hui Zheng
https://arxiv.org/abs/2507.03375

Index Theorem and Vortex Kinetics in Bose-Einstein Condensates on a Haldane Sphere with a Magnetic Monopole
The geometry-gauge interplay constitutes a fundamental issue in quantum physics, with profound implications spanning from quantum gravity to topological matter. Here, we investigate the dynamic effects of geometry-gauge interplay in Bose-Einstein condensates (BECs) on a Haldane sphere with a magnetic monopole. We reveal an index theorem that establishes a correspondence between BEC vortices and the topology of the gauge field, enabling the construction of vortex-monopole composites. Furthermore…

Dynamics of discrete spacetimes with Quantum-enhanced Markov Chain Monte Carlo
Stuart Ferguson, Arad Nasiri, Petros Wallden
https://arxiv.org/abs/2506.19538

Dynamics of discrete spacetimes with Quantum-enhanced Markov Chain Monte Carlo
Quantum algorithms offer the potential for significant computational advantages; however, in many cases, it remains unclear how these advantages can be practically realized. Causal Set Theory is a discrete, Lorentz-invariant approach to quantum gravity which may be well positioned to benefit from quantum computing. In this work, we introduce a quantum algorithm that investigates the dynamics of causal sets by sampling the space of causal sets, improving on classical methods. Our approach builds…

Untangling Selberg from the Wilson spool: 1-loop determinants and trace formulae in (A)dS$_{3}$
Samuel Haupfear, Victoria Martin, Andrew Svesko, Claire Zukowski
https://arxiv.org/abs/2507.05358

Untangling Selberg from the Wilson spool: 1-loop determinants and trace formulae in (A)dS$_{3}$
Leading quantum effects in perturbative quantum gravity are captured by functional determinants of kinetic operators. We study such 1-loop determinants in three-dimensional Euclidean (anti-) de Sitter gravity evaluated using two seemingly disparate tools, the Selberg zeta function and the Wilson spool. For the Euclidean BTZ black hole, we demonstrate the Wilson spool for massive bosons of arbitrary spin directly equates to a representation-theoretic version of the Selberg zeta function. In the …

Towards a consistent Semiclassical Theory of Gravity
Francisco Pipa
https://arxiv.org/abs/2507.05237 https://arxiv.org/pdf/2507.05237…

Towards a consistent Semiclassical Theory of Gravity
We argue that semiclassical gravity can be rendered consistent by assuming that quantum systems only emit a gravitational field when they interact with a stable determination chain (SDCs), which are specific chains of interactions modeled via decoherence and test functions obeying a set of conditions. When systems are disconnected from SDCs, they do not emit a gravitational field. This denies the universality of gravity, while upholding a version of the equivalence principle. We argue that this…

This https://arxiv.org/abs/2312.00871 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The q-Schwarzian and Liouville gravity
We present a new holographic duality between q-Schwarzian quantum mechanics and Liouville gravity. The q-Schwarzian is a one parameter deformation of the Schwarzian, which is dual to JT gravity and describes the low energy sector of SYK. We show that the q-Schwarzian in turn is dual to sinh dilaton gravity. This one parameter deformation of JT gravity can be rewritten as Liouville gravity. We match the thermodynamics and classical two point function between q-Schwarzian and Liouville gravity. W…

This https://arxiv.org/abs/2408.01583 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Superconducting Levitated Detector of Gravitational Waves
A magnetically levitated mass couples to gravity and can act as an effective gravitational wave detector. We show that a superconducting sphere levitated in a quadrupolar magnetic field, when excited by a gravitational wave, will produce magnetic field fluctuations that can be read out using a flux tunable microwave resonator. With a readout operating at the standard quantum limit, such a system could achieve broadband strain noise sensitivity of $h \lesssim 10^{-20}/\sqrt{\rm Hz}$ for frequenc…

This https://arxiv.org/abs/2203.06002 has been replaced.
link: https://scholar.google.com/scholar?q=a

Experiments on the Violation of Electromagnetic Gauge Symmetry by Yang-Mills Gravity Using Josephson Effects in Superconductors
Yang-Mills gravity is a quantum theory of gravity with translational gauge symmetry that is based on a flat space-time. The universal coupling of all quantum fields to quantum Yang-Mills gravity is based on the replacement of $\partial_μ$ by the translational gauge covariant derivative $(\partial_μ+gϕ_μ^ν\partial_ν)$ in the Lagrangians of non-gravitational fields. Near the surface of the Earth, Yang-Mills gravity causes the phase gradient $\partial_k θ$ to be altered by a factor of $h_1\…

The Crossed Product, Modular (Tomita) Dynamics and its Role in the Transition of Type $III$ to Type $II_{\infty}$ v.Neumann Algebras and Connections to Quantum Gravity
Manfred Requardt
https://arxiv.org/abs/2507.01419

The Crossed Product, Modular (Tomita) Dynamics and its Role in the Transition of Type $III$ to Type $II_{\infty}$ v.Neumann Algebras and Connections to Quantum Gravity
We analyse the role of the crossed product and the modular (Tomita) dynamics in the transition of type $III$ to type $II_{\infty}$ v.Neumann algebras which was recently observed in papers by Witten et al. In a preceding paper we argued that type $II_{\infty}$ v.Neumann algebras display certain features which we attributed to quantum gravity effects. We claim that the action of the modular evolution on the quantum fluctuations can be understood as an aspect of quantum gravity. We mention in this…

This https://arxiv.org/abs/2503.17834 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Gauge preservation in renormalization for Yang-Mills and gravity theories
In the present work, multiplicative renormalization \cite{dixon} for Yang-Mills theories is reviewed. While this subject is not new, it is suggested that a clear understanding of these methods leads to a systematic way for interpreting the counter terms needed for non multiplicative renormalization of quantum gravity, for models such as \cite{dewitt}-\cite{stelle2}. These models are renormalizable but contain apparent instabilities leading to possible unitarity loss, an earlier analog is \cite{…

Leading Logarithm Quantum Gravity II
S. P. Miao, N. C. Tsamis, R. P. Woodard
https://arxiv.org/abs/2507.04308 https://arxiv.org/pdf/2…

Leading Logarithm Quantum Gravity II
This paper is a sequel in which we derive and simplify the gravitational equations that apply in accelerating cosmological spacetimes. Solutions to these equations should be tantamount to all order resummations of the perturbative leading logarithms. We also discuss possible phenomenological applications to cosmological observables.

Probing Planck scale effects on absolute mass limit in neutrino flavor evolution
Kartik Joshi, Sanjib Dey, Satyajit Jena
https://arxiv.org/abs/2506.07588 h…

Probing Planck scale effects on absolute mass limit in neutrino flavor evolution
This work explores how the generalized uncertainty principle, a theoretical modification of the Heisenberg uncertainty principle inspired by quantum gravity, affects neutrino flavor oscillations. By extending the standard two-flavor neutrino model, we show that the oscillation probability acquires an additional phase term that depends on the square roots of the neutrino masses, introducing new features beyond the conventional mass-squared differences. To account for the non-Hermitian nature of …

This https://arxiv.org/abs/2311.13633 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Open AdS/CFT via a Double Trace Deformation
A concrete model of extracting the physics from the bulk of a gravitational universe is important to the study of quantum gravity and its possible relationship with experiments. Such a model can be constructed in the AdS/CFT correspondence by gluing a bath on the asymptotic boundary of the bulk anti-de Sitter (AdS) spacetime. This bath models a laboratory and is described by a quantum field theory. In the dual conformal field theory (CFT) description this coupling is achieved by a double-trace …

This https://arxiv.org/abs/2410.12693 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Area measures and branched polymers in supercritical Liouville quantum gravity
We study Liouville quantum gravity (LQG) in the supercritical (a.k.a. strongly coupled) phase, which has background charge $Q \in (0,2)$ and central charge $\mathbf{c}_{\mathrm{L}} = 1+6Q^2 \in (1,25)$. Recent works have shown how to define LQG in this phase as a planar random geometry associated with a variant of the Gaussian free field, which exhibits "infinite spikes." In contrast, a number of results from physics, dating back to the 1980s, suggest that supercritical LQG surfaces should beha…

This https://arxiv.org/abs/2506.03451 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Eye of the vortex: bound spectra in tunable horizonless rotational analogs
Analog gravity experiments are making remarkable strides in unveiling both the classical and quantum nature of black holes. By harnessing diverse states of matter, contemporary tabletop setups now replicate strong-field phenomena typically confined to the enigmatic regions surrounding black holes. Through these modern gravity simulators, physical processes once considered elusive may finally be brought into experimental reach. In this work, we investigate the bound spectrum of massless scalar e…

This https://arxiv.org/abs/2410.02270 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Beyond the ensemble paradigm in low dimensional quantum gravity: Schwarzian density, quantum chaos and wormhole contributions
Based on periodic orbit theory we address the individual-system versus ensemble interpretation of quantum gravity from a quantum chaos perspective. To this end we show that the spectrum of geodesic motion on high-dimensional hyperbolic manifolds, described by the Selberg trace formula, displays a Schwarzian ($\sinh 2π\sqrt{E}$) mean level density. Due to its chaotic classical limit, this quantum system also shows all universal signatures of quantum chaos. These two properties imply a possible …

This https://arxiv.org/abs/2502.18560 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Quantum decoherence of gravitational waves
The quantum nature of gravity remains an open question in fundamental physics, lacking experimental verification. Gravitational waves (GWs) provide a potential avenue for detecting gravitons, the hypothetical quantum carriers of gravity. However, by analogy with quantum optics, distinguishing gravitons from classical GWs requires the preservation of quantum coherence, which may be lost due to interactions with the cosmic environment causing decoherence. We investigate whether GWs retain their q…

Enhancement of the effects due to the Schr\"odinger-Newton equation
Davide Giordano Ario Altamura, Jos\'e Luis Gaona-Reyes, Elliot Simcox, Hendrik Ulbricht, Angelo Bassi
https://arxiv.org/abs/2507.02845

Enhancement of the effects due to the Schrödinger-Newton equation
The Schrödinger-Newton (SN) equation introduces a nonlinear self-gravitational term to the standard Schrödinger equation, offering a paradigmatic model for semiclassical gravity. However, the small deviations it predicts from standard quantum mechanics pose significant experimental challenges. We propose a novel method to amplify such deviations through periodic modulation of the trapping frequency in a levitated mechanical oscillator. We identify specific regimes where the SN-induced effects…

Quantum Gravity Corrections to the Scalar Quasi-Normal Modes in Near-Extremal Reissener-Nordstr\"{o}m Black Holes
Zheng Jiang, Jun Nian, Caiying Shao, Yu Tian, Hongbao Zhang
https://arxiv.org/abs/2506.22945

Quantum Gravity Corrections to the Scalar Quasi-Normal Modes in Near-Extremal Reissener-Nordström Black Holes
We investigate quantum corrections to scalar quasi-normal modes (QNMs) in the near-extremal Reissner-Nordström black hole background with quantum correction in the near-horizon AdS$_2\times \mathrm{S}^2$ region. By performing a dimensional reduction, we obtain an effective Jackiw-Teitelboim (JT) gravity theory, whose quantum fluctuations are captured by the Schwarzian action. Using path integral techniques, we derive the quantum-corrected scalar field equation, which modifies the effective pot…

Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
Marco Calz\`a, Davide Pedrotti, Guan-Wen Yuan, Sunny Vagnozzi
https://arxiv.org/abs/2507.02396

Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
In earlier companion papers, we showed that non-singular primordial black holes (PBHs) could account for all the dark matter (DM) over a significantly wider mass range compared to Schwarzschild PBHs. Those studies, mostly based on phenomenological metrics, are now extended by considering the quantum-corrected space-time recently proposed by Zhang, Lewandowski, Ma and Yang (ZLMY), derived from an effective canonical (loop) quantum gravity approach explicitly enforcing general covariance. Unlike …

This https://arxiv.org/abs/2211.15412 has been replaced.
link: https://scholar.google.com/scholar?q=a

STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept
Space-borne quantum technologies, particularly those based on atom interferometry, are heralding a new era of strategic and robust space exploration. The unique conditions of space, characterized by low noise and low gravity environments, open up diverse possibilities for applications ranging from precise time and frequency transfer to Earth Observation and the search of new Physics. In this paper, we summarise the M-class mission proposal in response to the 2022 call in ESA's science program: …

Phases of Tree-decorated Dynamical Triangulations in 3D
Timothy Budd, D\'aniel N\'emeth
https://arxiv.org/abs/2507.01604 https://

Phases of Tree-decorated Dynamical Triangulations in 3D
This work revisits the Euclidean Dynamical Triangulation (DT) approach to non-perturbative quantum gravity in three dimensions. Inspired by a recent combinatorial study by T. Budd and L. Lionni of a subclass of 3-sphere triangulations constructed from trees, called the \emph{triple-tree} class, we present a Monte Carlo investigation of DT decorated with a pair of spanning trees, one spanning the vertices and the other the tetrahedra of the triangulation. The complement of the pair of trees in t…

This https://arxiv.org/abs/1907.13457 has been replaced.
link: https://scholar.google.com/scholar?q=a

Universal Entanglement and an Information-Complete Quantum Theory
The most challenging problem of modern physics is how to reconcile quantum theory and general relativity, namely, to find a consistent quantum theory in which gravity is quantized. This Progress Report focuses on such a tentative theory called the information-complete quantum theory (ICQT), in which (1) spacetime (gravity) as a physical quantum system plays a central role for formulating the theory, and (2) there are no any classical systems and concepts. Here universal spacetime-matter entangl…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- A Simple Model for Quantum Gravity: the one-dimensional case
Ricardo Paszko

This https://arxiv.org/abs/2502.14578 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

The massive BMS character in 3D quantum gravity
We derive the one-loop partition function for three-dimensional quantum gravity in a finite-radius thermal twisted flat space with a conical defect, reproducing the massive BMS$_3$ character. We perform the computation in both discrete and continuum geometry formulations, showing consistency between them. In the discrete case, we integrate out bulk degrees of freedom in a Regge gravity framework, while in the continuum, we construct a dual non-local boundary field theory encoding geodesic lengt…

Random walk reflected off of infinity, with applications to uniform spanning forests and supercritical Liouville quantum gravity
Ewain Gwynne, Jinwoo Sung
https://arxiv.org/abs/2506.18827

Random walk reflected off of infinity, with applications to uniform spanning forests and supercritical Liouville quantum gravity
Let $\mathcal G$ be an infinite graph -- not necessarily one-ended -- on which the simple random walk is transient. We define a variant of the continuous-time random walk on $\mathcal G$ which reaches $\infty$ in finite time and "reflects off of $\infty$" infinitely many times. We show that the Aldous-Broder algorithm for the random walk reflected off of $\infty$ gives the free uniform spanning forest (FUSF) on $\mathcal G$. Furthermore, Wilson's algorithm for the random walk reflected off of…

This https://arxiv.org/abs/2502.02661 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

The Conformal Primon Gas at the End of Time
The Belinksy-Khalatnikov-Lifshitz dynamics of gravity close to a spacelike singularity can be mapped, at each point in space separately, onto the motion of a particle bouncing within half the fundamental domain of the modular group. We show that the semiclassical quantisation of this motion is a conformal quantum mechanics where the states are constrained to be modular invariant. Each such state defines an odd automorphic $L$-function. In particular, in a basis of dilatation eigenstates the wav…

The Study on Modified Theories of General Relativity: A Differential Geometric Approach
N. S. Kavya
https://arxiv.org/abs/2507.04031 https://

The Study on Modified Theories of General Relativity: A Differential Geometric Approach
The introduction of General Relativity (GR) in 1915 revolutionized our understanding of gravity, but over time, its limitations in explaining phenomena like dark energy, dark matter, and quantum gravity have motivated alternative theories. Early modifications, such as Weyl's 1919 proposal, focused on adding higher-order terms to the Einstein-Hilbert action. GR's non-renormalizability further strengthened the case for extending it. A central theme of modern gravity research is modifying the geom…

Relativistic implications of entropy and purity
Joseph Balsells, Martin Bojowald
https://arxiv.org/abs/2506.14705 https://arxiv.org/p…

Relativistic implications of entropy and purity
A quantum object is extended by virtue of quantum uncertainty. Subjected to gravity, it therefore experiences tidal forces and other relativistic effects. As a result, entropy and purity affect geodesic motion and acquire weight, an observation that has broad implications from free-fall experiments to Hawking radiation. If the object's position is quantum correlated in at least two directions, a complete description of its geodesic motion requires non-Riemannian geometry of a form controlled by…

Observer Time from Causality in Perturbative Quantum Gravity
Allic Sivaramakrishnan
https://arxiv.org/abs/2506.16109 https://arxiv.or…

Observer Time from Causality in Perturbative Quantum Gravity
It is unclear whether an observable notion of time exists in quantum gravity even in principle because spacetime itself fluctuates. We propose a form of observable time in perturbative quantum gravity. First, we define an elapsed proper time in curved space using intersections of worldlines and future light cones. Here, time arises from causality via the dependence on light cones. We then propose that performing the gravitational path integral describes quantum gravity corrections to this notio…

Renormalization group flows in area-metric gravity
Johanna Borissova, Bianca Dittrich, Astrid Eichhorn, Marc Schiffer
https://arxiv.org/abs/2507.02034 http…

Renormalization group flows in area-metric gravity
We put forward the first analysis of renormalization group flows in an area-metric theory, motivated by spin-foam quantum gravity. Area-metric gravity contains the well-known length-metric degrees of freedom of standard gravity as well as additional shape-mismatching degrees of freedom. To be phenomenologically viable, the shape-mismatching degrees of freedom have to decouple under the renormalization group flow towards lower scales. We test this scenario by calculating the renormalization grou…

This https://arxiv.org/abs/1907.13457 has been replaced.
link: https://scholar.google.com/scholar?q=a

Universal Entanglement and an Information-Complete Quantum Theory
The most challenging problem of modern physics is how to reconcile quantum theory and general relativity, namely, to find a consistent quantum theory in which gravity is quantized. This Progress Report focuses on such a tentative theory called the information-complete quantum theory (ICQT), in which (1) spacetime (gravity) as a physical quantum system plays a central role for formulating the theory, and (2) there are no any classical systems and concepts. Here universal spacetime-matter entangl…

DSR-relativistic spacetime picture and the phenomenology of Planck-scale-modified time dilation
Giovanni Amelino-Camelia, Giulia Gubitosi, Pietro Pellecchia, Marco Refuto, Giacomo Rosati
https://arxiv.org/abs/2506.08111

DSR-relativistic spacetime picture and the phenomenology of Planck-scale-modified time dilation
The most active area of research in quantum-gravity phenomenology investigates the possibility of Planck-scale-modified dispersion relations, focusing mainly on two alternative scenarios: the "LIV" scenario, characterized by a specific mechanism of breakdown of relativistic symmetries, and the "DSR" scenario, which preserves overall relativistic invariance but with deformed laws of relativistic transformation. Two recent studies of modified dispersion relations, one relying on Finsler geometry …

A Non-Inflationary Axion and ALP Misalignment Mechanism
Robert Brandenberger (McGill University)
https://arxiv.org/abs/2507.00785 https://

A Non-Inflationary Axion and ALP Misalignment Mechanism
Based on considerations of quantum gravity, global symmetries which lead to axions as pseudo Nambu-Goldstone bosons after low scale symmetry breaking cannot be exact at the Planck scale. Here, we show that Planck-suppressed terms which yield this symmetry breaking may provide a non-inflationary misalignment mechanism which can generate coherent oscillations of the axion and axion-like particle (ALP) fields at low temperatures.

Moduli Self-Fixing
Gonzalo F. Casas, Luis E. Ib\'a\~nez
https://arxiv.org/abs/2507.05345 https://arxiv.org/pdf/2507.05345

Moduli Self-Fixing
In Quantum Gravity (QG), large moduli values lead to towers of exponentially light states, making the QG cut-off field-dependent. In 4D supersymmetric (SUSY) theories, this cut-off is set by the species scale $Λ(z_i, \bar{z}_i)$, where $z_i$ are complex moduli. We argue that in GKP-like 4D no-scale vacua, accounting for this field dependence generates one-loop, positive-definite potentials for the otherwise unfixed moduli, with local Minkowski minima at the desert points in moduli space with $…

Homothetic expansion of polyhedra in the two-vertex model: emergence of FLRW
I\~naki Garay, Sergio Rodr\'iguez-Gonz\'alez, Ra\"ul Vera
https://arxiv.org/abs/2507.06951

Homothetic expansion of polyhedra in the two-vertex model: emergence of FLRW
The cosmological behavior associated to a U(N)-symmetry reduced sector of the loop-quantum-gravity truncation known as the two-vertex model is further explored in this work. We construct convenient frame bases that encode the whole classical phase space of the twisted geometry associated to the graph. We show that the polyhedra of the twisted geometry suffer under evolution an homothetic expansion, which strengthens the correspondence to the Robertson-Walker geometry.

This https://arxiv.org/abs/2407.02313 has been replaced.
link: https://scholar.google.com/scholar?q=a

A Casimir-like probe for 4D Einstein-Gauss-Bonnet gravity
Virtual transitions in a Casimir-like configuration are utilized to probe quantum aspects of four-dimensional Einstein-Gauss-Bonnet (4D EGB) gravity. This study employs a quantum optics-based approach, wherein an Unruh-DeWitt detector (modeled as a two-level atom) follows a radial timelike geodesic, falling freely into an uncharged, nonrotating black hole described by 4D EGB gravity, becoming thermalized in the usual Unruh manner. The black hole, asymptotically Minkowskian, is enclosed by a Cas…

This https://arxiv.org/abs/2505.23199 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Chaos in the holographic matrix models for meson and baryon
In recent years, the investigation of chaos has become a bridge connecting gravity theory and quantum field theory, especially within the framework of gauge-gravity duality. In this work, we study holographically the chaos in the matrix models for meson and baryon, which are derived from the $\mathrm{D4}/\mathrm{D6}/\overline{\mathrm{D6}}$ approach as a top-down holographic model for QCD. Since these matrix models can be simplified into coupled oscillator models with special parameters, we anal…

This https://arxiv.org/abs/2409.02188 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Stochastic dark matter: Covariant Brownian motion from Planckian discreteness
Quantum gravity has long remained elusive from an observational standpoint. Developing effective cosmological models motivated by the fundamental aspects of quantum gravity is crucial for bridging theory with observations. One key aspect is the granularity of spacetime, which suggests that free particles would deviate from classical geodesics by following a covariant Brownian motion. This notion is further supported by swerves models in causal set theory, a discrete approach to quantum gravity.…

Open-closed 3d gravity as a random ensemble
Daniel L. Jafferis, Liza Rozenberg, Diandian Wang
https://arxiv.org/abs/2506.19817 https://

Open-closed 3d gravity as a random ensemble
We investigate an ensemble of boundary CFTs within the framework of a tensor model recently constructed to model 3d quantum gravity. The incorporation of CFT borders introduces new elements to the gravity theory. In particular, it leads to an open-closed extension of Virasoro TQFT, which in the classical limit gives rise to 3d gravity with tensionful end-of-the-world branes. It also provides predictions for off-shell manifolds with bordered asymptotic boundaries, such as the annulus wormhole. A…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Predicting wide binaries and deviations from standard gravity using machine learning algorithms
Amoy Ashesh, Harsimran Kaur, Sandeep Aashish

This https://arxiv.org/abs/2505.23891 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

A microscopic Normal Matrix Model for $(A)dS_2$
We describe the duality between the gravitating $c=1$ (compact) Sine-Gordon model and a normal matrix model. From a two-dimensional quantum gravity perspective and due to the periodic nature of the potential, this model admits both anti-de Sitter and de-Sitter saddles, similarly to simpler models of Sine-Dilaton gravity, as well as more complicated interpolating "wineglass wormhole" geometries. From a string theory perspective the Euclidean de-Sitter (genus zero) saddles are related to the pres…

This https://arxiv.org/abs/2503.06207 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Transport and response coefficients in second-order dissipative relativistic hydrodynamics with quantum corrections: probing the quark-gluon plasma
A functional measure encompasses quantum corrections and is explored in the fluid/gravity correspondence. Corrections to response and transport coefficients in the second-order dissipative relativistic hydrodynamics are proposed, including the ones to the pressure, the relaxation time, and the shear relaxation. Their dependence on the quark-gluon plasma (QGP) temperature sets a temperature dependence on the running parameter encoding the one-loop quantum gravity correction, driven by a function…

This https://arxiv.org/abs/2403.05284 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Gravity as a deformed topological gauge theory
We describe gauge theories which allow to retrieve a large class of gravitational theories, including, MacDowell-Mansouri gravity and its topological extension to Loop Quantum Gravity via the Pontrjagin characteristic class involving the Nieh-Yan term. Considering symmetric spaces parametrized by mutations allows to naturally obtain a bare cosmological constant which in particular cases gives rise to a positive effective cosmological constant while having an AdS spacetime. Two examples are st…

On the reconstruction map in JT gravity
Chris Akers, Andrew Lucas, Amit Vikram
https://arxiv.org/abs/2506.18975 https://arxiv.org/pdf…

On the reconstruction map in JT gravity
An open question in AdS/CFT is how to reconstruct semiclassical bulk operators precisely enough that non-perturbative quantum effects can be computed. We propose a set of physically-motivated requirements for such a reconstruction map, and explicitly construct a map satisfying these requirements in Jackiw-Teitelboim (JT) gravity. Our map is found by canonically quantizing "action-angle" variables for JT gravity, which are chosen to ensure that the spectrum of the fundamental quantum theory matc…

Measurements in stochastic gravity and thermal variance
Markus B. Fr\"ob, Dra\v{z}en Glavan, Paolo Meda
https://arxiv.org/abs/2506.23193 https://

Measurements in stochastic gravity and thermal variance
We analyze the thermal fluctuations of a free, conformally invariant, Maxwell quantum field (photon) interacting with a cosmological background spacetime, in the framework of quantum field theory in curved spacetimes and semiclassical and stochastic gravity. The thermal fluctuations give rise to backreaction effects upon the spacetime geometry, which are incorporated in the semiclassical Einstein-Langevin equation, evaluated in the cosmological Friedmann-Lemaître-Robertson-Walker spacetime. We…

Could Planck Star Remnants be Dark Matter?
Oem Trivedi, Abraham Loeb
https://arxiv.org/abs/2506.03334 https://arxiv.org/pdf/2506.0333…

Could Planck Star Remnants be Dark Matter?
We explore the end state of gravitational collapse under quantum gravity effects and propose that Planck Star Remnants (PSR), formed via nonsingular bounces, could serve as viable dark matter candidates. Within the framework of Loop Quantum Cosmology, we model the collapse of a homogeneous matter distribution and show that the classical singularity is replaced by a quantum bounce at the Planck density. By analytically matching the Friedmann Lemaitre Robertson Walker (FLRW) interior to an exteri…

This https://arxiv.org/abs/2411.06188 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

The thermodynamic profile of AdS black holes in Lorentz-violating Bumblebee and Kalb-Ramond gravity
Lorentz invariance violation (LIV) is a topic of significant interest in quantum gravity and in extensions of the Standard Model of particle physics. Recently, new classes of black hole solutions have been proposed, involving vector fields and rank-two antisymmetric tensor fields that acquire nontrivial vacuum expectation values, resulting in the Bumblebee and Kalb-Ramond (KR) gravity models, respectively. These models exhibit novel geometric structures and differ in notable ways from standard …

Fully Self-Consistent Semiclassical Gravity
R. Muci\~no, E. Okon, D. Sudarsky, M. Wiedemann
https://arxiv.org/abs/2506.17149 https://…

Fully Self-Consistent Semiclassical Gravity
A theory of quantum gravity consists of a gravitational framework which, unlike general relativity, takes into account the quantum character of matter. In spite of impressive advances, no fully satisfactory, self-consistent and empirically viable theory with those characteristics has ever been constructed. A successful semiclassical gravity model, in which the classical Einstein tensor couples to the expectation value of the energy-momentum tensor of quantum matter fields, would, at the very le…

This https://arxiv.org/abs/2410.20529 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Formation of nonsingular spherical black holes with holonomy corrections
We present a canonical model of spherical gravity with covariant corrections motivated by loop quantum gravity. The effective Hamiltonian defines univocally a family of geometries that generalizes the Lemaître-Tolman-Bondi spacetimes, and they can be matched to the vacuum of the theory across a timelike hypersurface comoving with the flow of matter. Such is precisely the complete spacetime picture of a spherical star subject to its own gravitational pull. The singularity gets replaced with a s…

Primordial Black Holes are 5D
Luis A. Anchordoqui, Alek Bedroya, Dieter L\"ust
https://arxiv.org/abs/2506.14874 https://arxiv.or…

Primordial Black Holes are 5D
We revisit well-established mechanisms for primordial black hole (PBH) production, namely inflation, phase transitions, and cosmic strings, in the context of the Dark Dimension Scenario, which is motivated by Swampland principles. Applying quantum gravity constraints, we demonstrate that any viable mechanism, barring exotic new physics at low energies, inevitably leads to the formation of five-dimensional PBHs. We further show that PBHs formed from cosmic strings can have lifetimes comparable t…

Nonlocal correlations for semiclassical states in loop quantum gravity
Filipe H. C. Menezes, Nelson Yokomizo
https://arxiv.org/abs/2506.19729 https://

Nonlocal correlations for semiclassical states in loop quantum gravity
We compute the two-point correlation function of the area operator for semiclassical states of loop quantum gravity in the limit of large spins. The cases of intrinsic and extrinsic coherent states are considered, along with a new class of semiclassical states constructed as perturbations of Livine-Speziale coherent states. For the usual coherent states, the correlations are shown to be short-ranged, decaying exponentially with the distance. Introducing perturbations given by correlated element…

This https://arxiv.org/abs/2206.00780 has been replaced.
link: https://scholar.google.com/scholar?q=a

The BRST Double Complex for the Coupling of Gravity to Gauge Theories
We consider (effective) Quantum General Relativity coupled to the Standard Model (QGR-SM) and clarify whether graviton-ghosts couple to matter particles. To this end, we examine the corresponding BRST and anti-BRST symmetries, which are generated by infinitesimal diffeomorphisms and infinitesimal gauge transformations. In particular, we study their properties and relations: We find that all differentials mutually anticommute, which implies that they form a double complex. In particular, we intr…

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Adrian Ka-Wai Chung, Nicol\'as Yunes
https://arxiv.org/abs/2506.14695

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Quadratic gravity theories emerge as the low-energy limit of many grand-unified and quantum-gravity theories. We report the first gravitational-wave ringdown constraints on such theories obtained purely from the quasinormal-mode spectra of rapidly-spinning black-hole remnants. We find no quadratic-gravity signatures from ringdown signals measured by the LIGO-Virgo-KAGRA detectors, thereby constraining the coupling length scale of axi-dilaton gravity below 34 km, dynamical Chern-Simons gravity b…

Eye of the vortex: bound spectra in tunable horizonless rotational analogs
H. S. Vieira, Kyriakos Destounis
https://arxiv.org/abs/2506.03451 https://

Eye of the vortex: bound spectra in tunable horizonless rotational analogs
Analog gravity experiments are making remarkable strides in unveiling both the classical and quantum nature of black holes. By harnessing diverse states of matter, contemporary tabletop setups now replicate strong-field phenomena typically confined to the enigmatic regions surrounding black holes. Through these modern gravity simulators, physical processes once considered elusive may finally be brought into experimental reach. In this work, we investigate the bound spectrum of massless scalar e…

No dynamical CPT symmetry restoration in quantum gravity
Astrid Eichhorn, Marc Schiffer
https://arxiv.org/abs/2506.12001 https://arxi…

No dynamical CPT symmetry restoration in quantum gravity
CPT symmetry is at the heart of the Standard Model of particle physics and experimentally very well tested, but expected to be broken in some approaches to quantum gravity. It thus becomes pertinent to explore which of the two alternatives is realized: (i) CPT symmetry is emergent, so that it is restored in the low-energy theory, even if it is broken beyond the Planck scale, (ii) CPT symmetry cannot be emergent and must be fundamental, so that any approach to quantum gravity, in which CPT is br…

Gravitational Wave Signatures of Periodic Motion near Higher-Derivative Einstein-\AE ther Black Holes
Sayantan Choudhury, Md Khalid Hossain, Gulnur Bauyrzhan, Koblandy Yerzhanov
https://arxiv.org/abs/2507.00904

Gravitational Wave Signatures of Periodic Motion near Higher-Derivative Einstein-Æther Black Holes
Higher-derivative modifications of general relativity are generically expected from effective field theory approaches to quantum gravity, and they arise naturally in Lorentz-violating theories such as Einstein-Ether gravity. In this work, we investigate black hole spacetimes within Einstein-Ether theory supplemented by quadratic curvature corrections, including terms proportional to $R^2$, $R_{μν} R^{μν}$, and $R_{μνλρ} R^{μνλρ}$. We derive the corrected static, spherically symmetri…

Observers and Timekeepers: From the Page-Wootters Mechanism to the Gravitational Path Integral
Zixia Wei
https://arxiv.org/abs/2506.21489 https://

Observers and Timekeepers: From the Page-Wootters Mechanism to the Gravitational Path Integral
Quantum gravity in a closed universe faces two a priori distinct yet seemingly related issues: the problem of time and the fact that its Hilbert space dimension is one. Both have been argued to be resolvable by formulating physics relative to an observer. Using a simple gravitational path integral model, we explain that the two issues arise from two distinct non-perturbative effects: the former from summing over metrics and the latter from summing over topologies. We then revisit the Page-Woott…

Emergence of cosmic structure from Planckian discreteness
Gabriel R. Bengochea, Gabriel Leon, Alejandro Perez
https://arxiv.org/abs/2506.15413 https://

Emergence of cosmic structure from Planckian discreteness
In the standard inflationary paradigm the inhomogeneities observed in the CMB arise from quantum fluctuations of an initially homogeneous and isotropic vacuum state. This picture suffers from two well-known weaknesses. First, it assumes that quantum field theory remains valid at trans-Planckian scales, without modifications from quantum gravity. Second, it necessitates a quantum-to-classical transition in which fluctuations of a homogeneous quantum state become the classical inhomogeneities see…

This https://arxiv.org/abs/2406.05820 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Thermodynamic phase description of charged 4D Gauss-Bonnet black holes in quantum regime
Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)] ave argued for a 4D theory of Gauss-Bonnet (GB)gravity. This model predicts significant contributions of the GB coupling parameter $α$ to gravitational dynamics, while circumventing the Lovelock theorem and avoiding Ostrogradsky instability. As a powerful competitor to general relativity (GR), the model has been examined on various phenomenological grounds. Here, we employ a technique from information geometry to analyze the thermodynamic ph…

Holography with Null Boundaries
Christian Ferko, Savdeep Sethi
https://arxiv.org/abs/2506.20765 https://arxiv.org/pdf/2506.20765

Holography with Null Boundaries
One of the key issues in holography is going beyond $\mathrm{AdS}$ and defining quantum gravity in spacetimes with a null boundary. Recent examples of this type involve linear dilaton asymptotics and are related to the $T \overline{T}$ deformation. We present a holographic correspondence derived from string theory, which is an example of a kind of celestial holography. The holographic definition is a spacetime non-commutative open string theory supported on D1-D5 branes together with fundamenta…

Can Gravitational Wave Data Shed Light on Dark Matter Particles ?
Parthasarathi Majumdar
https://arxiv.org/abs/2506.04905 https://arx…

Can Gravitational Wave Data Shed Light on Dark Matter Particles ?
Gravitational wave (GW) data from observed binary black hole coalescences (BBHC), proven to validate the Hawking Area Theorem (HAT) for black hole horizons, has been demonstrated to unambiguously pick theoretically computed logarithmic corrections to the Bekenstein-Hawking Area Formula, which have a {\it negative} coefficient, when combined with the Generalized Second Law of thermodynamics. We propose a composite, `hybrid' approach to quantum gravity black hole entropy calculation, additively c…

Few-grid-point simulations of Big Bang singularity in quantum cosmology
Miloslav Znojil
https://arxiv.org/abs/2506.14848 https://arxi…

Few-grid-point simulations of Big Bang singularity in quantum cosmology
In the context of the current lack of compatibility of the classical and quantum approaches to gravity, exactly solvable elementary pseudo-Hermitian quantum models are analyzed supporting the acceptability of a point-like form of Big Bang. The purpose is served by a hypothetical (non-covariant) identification of the ``time of Big Bang'' with the Kato's exceptional-point parameter $t=0$. Consequences (including the ambiguity of the patterns of unfolding of the singularity after Big Bang) are stu…

Perihelion precession of planetary orbits solved from quantum field theory
Mikko Partanen, Jukka Tulkki
https://arxiv.org/abs/2506.14447 https://

Perihelion precession of planetary orbits solved from quantum field theory
We derive the perihelion precession of planetary orbits using quantum field theory extending the Standard Model to include gravity. Modeling the gravitational bound state of an electron via the Dirac equation of unified gravity [Rep. Prog. Phys. 88, 057802 (2025)], and taking the classical planetary state limit, we obtain orbital dynamics exhibiting a precession in agreement with general relativity. This demonstrates that key general relativistic effects in planetary motion can emerge directly …

LQG inspired spacetimes as solutions of the Einstein equations
Marcos V. de S. Silva, Carlos F. S. Pereira, G. Alencar, Celio R. Muniz
https://arxiv.org/abs/2506.19818

LQG inspired spacetimes as solutions of the Einstein equations
Black bounces are compact objects with a wormhole structure hidden behind an event horizon. This type of metric can be obtained through general relativity by considering the presence of exotic matter. Such spacetimes can also arise within the framework of effective theories inspired by loop quantum gravity. In this work, we verify the possibility of obtaining black bounce models inspired by loop quantum gravity as solutions of general relativity. For this, we examine which sources can generate …

Coupling Electromagnetism to Torsion: Black Holes and Spin-Charge Interactions
Sebastian Bahamonde, Jorge Maggiolo, Christian Pfeifer
https://arxiv.org/abs/2507.02362

Coupling Electromagnetism to Torsion: Black Holes and Spin-Charge Interactions
The coupling between matter fields and gravity (encoded in the geometry of spacetime) can be realized in various ways. Most commonly, a minimal coupling principle is employed, meaning that all matter fields, except spinors, couple only to the spacetime metric, while spinors additionally couple to the spacetime connection. Non-minimal couplings between matter fields and spacetime curvature can arise, for example, from quantum field theory on curved spacetime through renormalization corrections, …

The Cosmological Constant from a Quantum Gravitational $\theta$-Vacua and the Gravitational Hall Effect
Stephon Alexander, Heliudson Bernardo, Aaron Hui
https://arxiv.org/abs/2506.14886

The Cosmological Constant from a Quantum Gravitational $θ$-Vacua and the Gravitational Hall Effect
We provide a new perspective on the cosmological constant by exploring the background-independent Wheeler-DeWitt quantization of general relativity. The Chern-Simons-Kodama state of quantum gravity, a generalization of the Hartle-Hawking and Vilenkin states, has a striking structural similarity to the topological field theory of the quantum Hall effect. As a result, we study the gravitational topological $θ$-sectors in analogy to Yang-Mills theory. We find that the cosmological constant $Λ$ i…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Dynamical analysis of logarithmic energy-momentum squared gravity
Giovanni Acquaviva, Nihan Katirci

The Carrollian Kaleidoscope
Arjun Bagchi, Aritra Banerjee, Prateksh Dhivakar, Saikat Mondal, Ashish Shukla
https://arxiv.org/abs/2506.16164 https://…

The Carrollian Kaleidoscope
The Carroll group arises in the vanishing speed of light limit of the Poincaré group and was initially discarded as just a mathematical curiosity. However, recent developments have proved otherwise. Carroll and conformal Carroll symmetries are now ubiquitous, appearing in diverse physical phenomena starting from condensed matter physics to quantum gravity. This review aims to provide the reader a gateway into this fast-developing field. After an introduction and setting the stage with basics o…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[3/3]:
- Self-gravitating strings and quantum effects in two-dimensional gravity
Akihiro Ishibashi, Yoshinori Matsuo, Akane Tanaka

Local d'Alembertian for causal sets
Mari\'an Bogu\~n\'a, Dmitri Krioukov
https://arxiv.org/abs/2506.18745 https://arxiv.o…

Local d'Alembertian for causal sets
Causal set theory is an intrinsically nonlocal approach to quantum gravity, inheriting its nonlocality from Lorentzian nonlocality. This nonlocality causes problems in defining differential operators -- such as the d'Alembert operator, a cornerstone of any relativistic field theory -- within the causal set framework. It has been proposed that d'Alembertians in causal sets must themselves be nonlocal to respect causal set nonlocality. However, we show that such nonlocal d'Alembertians do not con…