Tootfinder

Trace anomaly contributions to semi-classical wormhole geometries
Mohammad Reza Mehdizadeh, Amir Hadi Ziaie, Francisco S. N. Lobo
https://arxiv.org/abs/2509.04049 https://

Trace anomaly contributions to semi-classical wormhole geometries
We investigate wormhole solutions within the framework of the semi-classical Einstein equations in the presence of the conformal anomaly (or trace anomaly). These solutions are sourced by a stress-energy tensor (SET) derived from the trace anomaly, and depend on two positive coefficients, $α$ and $λ$, determined by the matter content of the theory and on the degrees of freedom of the involved quantum fields. For a Type B anomaly ($α=0$), we obtain wormhole geometries assuming a constant reds…

Coulomb-Corrected Wormhole Model for Neon-20
Ruoxin Bai, N. S. Manton
https://arxiv.org/abs/2508.02428 https://arxiv.org/pdf/2508.02428

Coulomb-Corrected Wormhole Model for Neon-20
Building on the spatial wormhole geometry proposed by Manton and Dunajski, we develop a modified model for the Neon-20 nucleus that incorporates a repulsive Coulomb potential. This reduces the large threshold energy for cluster break-up in the original model and converts most bound states to resonances. We use generalized WKB methods to calculate the energies of bound states, and also the energies and widths of under-barrier and over-barrier resonances. The results align closely with experiment…

Stationary Solution to Charged Hairy Black Hole in AdS4: Kasner Interior, Rotating Shock Waves, and Fast Scrambling
Hadyan Luthfan Prihadi, Rafi Rizqy Firdaus, Fitria Khairunnisa, Donny Dwiputra, Freddy Permana Zen
https://arxiv.org/abs/2508.02174

Stationary Solution to Charged Hairy Black Hole in AdS4: Kasner Interior, Rotating Shock Waves, and Fast Scrambling
We consider a stationary solution of a charged black hole with scalar hair in AdS$_4$, where the scalar field is coupled to a $U(1)$ Maxwell gauge field. Near the singularity, the spacetime transitions into a more general Kasner geometry. The black hole is then injected with rotating and charged gravitational shock waves in the Dray-'t Hooft solution. These shock waves lengthen the wormhole connecting the two asymptotic boundaries, thereby disrupting the correlations between them. The correlati…

Neutrino oscillations in the Ellis wormhole spacetime
Ya-Ru Wang, Shu-Jun Rong
https://arxiv.org/abs/2506.23905 https://arxiv.org/pdf…

Neutrino oscillations in the Ellis wormhole spacetime
Gravitational lensing is a powerful tool to probe compact astrophysical objects and the distribution of dark matter at large scales. As a counterpart of photons, lensed relativistic neutrinos could also be used to explore properties of curved spacetimes. In the present paper we consider neutrino oscillations in the Ellis wormhole (WH) spacetime in comparison with the widely discussed black hole (BH) spacetimes. We investigate the oscillations involving lensing effects with 2- and 3-flavor neutr…

Closed timelike curves in PT-symmetric wormholes
Hicham Zejli
https://arxiv.org/abs/2508.00035 https://arxiv.org/pdf/2508.00035

Closed timelike curves in PT-symmetric wormholes
We investigate a modified Einstein-Rosen wormhole model, made unidirectionally traversable through a bimetric geometry defined by two regular metrics, g(+) and g(-), and characterized by PT symmetry combining time reversal (t -> -t) and spatial inversion (x -> -x). In this framework, two distinct spacetime regions are identified at the wormhole throat (r = alpha) via PT symmetry, forming a single spacetime sheet. This model employs Eddington-Finkelstein coordinates to eliminate coordinate singu…

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…

Yukawa-Casimir wormholes within Einstein-Cartan gravity framework
Nayan Sarkar, Susmita Sarkar, Abdelmalek Bouzenada
https://arxiv.org/abs/2509.02631 https://

Yukawa-Casimir wormholes within Einstein-Cartan gravity framework
The Einstein-Cartan (EC) theory of gravity provides a natural extension of general relativity by incorporating spacetime torsion to account for the intrinsic spin of matter. In this work, we investigate Yukawa-Casimir traversable wormholes supported by three distinct Yukawa-Casimir energy density profiles within the framework of EC gravity. The resulting shape functions are shown to satisfy all the fundamental requirements for traversable wormhole geometries. Our analysis reveals that the prese…

SYK model based $\beta$ regime dependent two-qubit dynamical wormhole-inspired teleportation protocol simulation
Sudhanva Joshi, Sunil Kumar Mishra
https://arxiv.org/abs/2506.15373

SYK model based $β$ regime dependent two-qubit dynamical wormhole-inspired teleportation protocol simulation
This study aims to provide insights into various aspects of quantum chaos and teleportation by implementing the recently developed Wormhole-Inspired Teleportation Protocol (WITP). We commence by constructing an analog of a traversable wormhole utilizing the Sachdev-Ye-Kitaev (SYK) model in conjunction with the Thermofield Double (TFD) state framework, implemented within a quantum circuit. Subsequently, we manipulate various parameters, including temperature ($β$) and the location of the messag…

A Josephson wormhole in coupled superconducting Yukawa-SYK metals
Aravindh S. Shankar, Jasper Steenbergen, Stephan Plugge, Koenraad Schalm
https://arxiv.org/abs/2506.16907

A Josephson wormhole in coupled superconducting Yukawa-SYK metals
We show that two Yukawa-SYK models with a weak tunneling contact can have an exotic hybrid superconducting thermofield-double-like state that is holographically dual to a traversable wormhole connecting two black holes with charged scalar hair. The hybrid superconducting thermo-field-double/wormhole state is distinguishable by anomalous scaling of revival oscillations in the fermionic Green's function, but also in a unique Andreev-revival in the anomalous Green's function. The existence of this…

Peculiarities of quantum field theory in the presence of a wormhole
Mikhail N. Smolyakov
https://arxiv.org/abs/2506.21256 https://arx…

Peculiarities of quantum field theory in the presence of a wormhole
In this paper, quantum theory of a real massive scalar field in the background of a traversable wormhole is examined. The wormhole is supposed to connect two different universes, as a particular example the simplest Ellis wormhole is considered. It is shown that the resulting theory possesses a doubling of quantum states parameterized by the same value of asymptotic momentum, two different sets of such degenerate states are localized in different universes. This is a consequence of the topologi…

Logo singularity is real. No matter how complex your logo starts off, it will inevitably be homogenized into a single colored dot.
Cracker Barrel's logo has just breached the event horizon and quickly descends down the wormhole.

Hyperbolic Casimir-like wormhole
Roberto Avalos, Ernesto Contreras, Daniel Brito, Ernesto Fuenmayor
https://arxiv.org/abs/2507.17906 https://arxiv.org/pdf/…

Hyperbolic Casimir-like wormhole
We present a systematic study of exact solutions for traversable wormhole geometries in a static and hyperbolic symmetric spacetime. In the conventional form of studying wormhole geometry, traversability requires the presence of exotic matter, which also provides negative gravity effects to keep the wormhole throat open. Using hyperbolic symmetry we obtain a solution already provided with negative energy density that replaces this effect and allows us to derive wormhole geometries that effectiv…

Soo cool, dass Wormhole Dateien ggf. über das lokale Netzwerk schickt. 🫶🏻

Replaced article(s) found for astro-ph.CO. https://arxiv.org/list/astro-ph.CO/new
[2/2]:
- Fuzzy Dark Matter Less-complex Wormhole Structures in Higher-Order Curvature Gravity
Z. Yousaf, Kazuharu Bamba, Bander Almutairi, M. Z. Bhatti, M. Rizwan

Pixie cat has been dusting behind the wardrobe.
She likes to go round there from time-to-time to check if there are any nesting birds. Because you never know. Ever the optimist.
It's a bit of a squeeze, and she comes out covered in dust. I have yet to determine how she manages to turn around. I suspect she uses a wormhole or something.
#CatsOfMastodon

Black holes and wormholes in Deser-Woodard gravity
Juliano C. S. Neves
https://arxiv.org/abs/2507.00936 https://arxiv.org/pdf/2507.00…

Black holes and wormholes in Deser-Woodard gravity
The Deser-Woodard gravity is a modified theory of gravity in which nonlocality plays a central role. In this context, nonlocality is consequence of the inverse of the d'Alembertian operator $\square^{-1}$ in the effective action. Here, analytic black hole and wormhole solutions are built in the revised Deser-Woodard theory following a recent approach, where a special tetrad frame simplifies the complicated field equations of the theory. From deviations of the Schwarzschild metric and Reissner-N…

Sculpting Spacetime: Thin Shells in Wormhole Physics
Francisco S. N. Lobo
https://arxiv.org/abs/2508.17823 https://arxiv.org/pdf/2508.17823

Sculpting Spacetime: Thin Shells in Wormhole Physics
In this work, we employ the Darmois-Israel thin-shell formalism to construct both static and dynamic thin-shell configurations surrounding traversable wormholes. Initially, using the cut-and-paste technique, we perform a linearized stability analysis in the presence of a general cosmological constant. Our results show that for sufficiently large positive values of the cosmological constant, corresponding to the Schwarzschild-de Sitter geometry, the stability regions of the wormhole solutions ar…

Algebraic traversable wormholes
Eyoab Bahiru
https://arxiv.org/abs/2508.13283 https://arxiv.org/pdf/2508.13283

Algebraic traversable wormholes
We propose a new large $N$ limit which at the extreme limit is dual in the bulk to a back-reacted traversable wormhole, by making use if a novel definition of algebra at infinity, an algebra familiar in the literature from the study of quasi-local algebras. We also compute, from a purely algebraic perspective, the effects registered by a left universe observer due to a unitary fluctuation on the right universe of the traversable wormhole, and reproduce a result from an earlier computation by Ma…

Role of cosmic voids and their matter properties in shaping wormhole geometry in generalized geometry-matter coupling gravity
A. Errehymy, S. Hansraj
https://arxiv.org/abs/2508.17492

Role of cosmic voids and their matter properties in shaping wormhole geometry in generalized geometry-matter coupling gravity
Cosmic voids are increasingly recognized as a promising tool for cosmological exploration. Their distribution and density profiles are highly responsive to alterations in gravitational theories, along with the influences of dark energy and neutrinos. Investigating voids offers a compelling opportunity to uncover signatures of alternative gravity models on a cosmological level. Voids span a notable range of density contrasts, from approximately -$1$ near their centers to around $0$ at their edge…

The holographic dual of the GHZ state
Libo Jiang, Yan Liu
https://arxiv.org/abs/2508.17898 https://arxiv.org/pdf/2508.17898

The holographic dual of the GHZ state
Current holographic research mostly focuses on a subset of quantum systems with a classical gravity dual. Although the precise boundary of this subset remains unknown, certain constraints are recognized; for instance, holographic entropies obey inequalities that are violated by general quantum states such as the GHZ states. This paper, however, presents a gravity dual for GHZ states -- a non-ordinary geometry termed the booklet wormhole. We demonstrate an exact match for all entropy properties …

Study of Wormhole in $f(Q)$ gravity with some dark energy models
Tanmoy Chowdhury, Prabir Rudra, Tandrima Chowdhury, Farook Rahaman
https://arxiv.org/abs/2507.03939

Study of Wormhole in $f(Q)$ gravity with some dark energy models
This study discusses the development of some particular static wormhole models in the background of an extended $f(Q)$ gravity theory. Wormhole solutions are derived by considering the radial pressure to admit an equation of state corresponding to Chaplygin gas. The Chaplygin gas equation of state is taken into consideration in two different forms: $p_{r}=-\frac{Bb(r)^{u}}{ρ^{a}}$, $p_{r}=-\frac{B}{ρ^{a}}$. Wormhole models are also generated assuming that a variable barotropic fluid may expla…

The holographic entanglement pattern of BTZ planar black hole from a thread perspective
Yi-Yu Lin, Dong-Yu Fang, Jie-Chen Jin, Chen-Ye Li
https://arxiv.org/abs/2508.16977 https:…

The holographic entanglement pattern of BTZ planar black hole from a thread perspective
In this paper, we study the holographic quantum entanglement structure in the finite-temperature CFT state/planar BTZ black hole correspondence from the perspective of entanglement threads. Unlike previous studies based on bit threads, these entanglement threads provide a more detailed characterization of the contribution sources to the von Neumann entropy of boundary subregions, in particular by quantitatively deriving the flux function of entanglement threads that traverse the wormhole horizo…

Wormhole Solutions and pre-inflationary in $F(R, T)$ Gravity with Axion Fields
Guo-He Li, Yeqi Fang, Yuchi Wu, Jun Tao
https://arxiv.org/abs/2506.09310 htt…

Wormhole Solutions and pre-inflationary in $F(R, T)$ Gravity with Axion Fields
In this study, we investigate wormhole solutions and inflationary initial conditions in the coupled axion-inflaton/scalar field system within $F(R,T)$ gravity. Notably, the Euclidean action is reduced by approximately $10^5$ compared with the GR case. In Euclidean AdS spacetime, we construct Euclidean (semi-)wormhole geometries that naturally set inflationary initial conditions. To enhance the probability of sustained inflation and address the short inflation duration issue in the no-boundary p…

A viable wormhole model in a five-dimensional spacetime
Peter K. F. Kuhfittig
https://arxiv.org/abs/2506.09111 https://arxiv.org/pdf/…

A viable wormhole model in a five-dimensional spacetime
This paper generalizes two of the author's earlier wormhole solutions that are characterized by an extra spatial dimension. This paper adds the assumption that the components of the line element are functions not only of the radial coordinate $r$ but of the extra coordinate $l$ as well, resulting in a significant generalization. It is shown that the throat of the wormhole can be threaded with ordinary matter and that the unavoidable violation of the null energy condition can be attributed to th…

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…

Bondi accretion disk luminosity around neutral and charged Simpson-Visser spacetimes
Serena Gambino, Roberto Giamb\`o, Orlando Luongo
https://arxiv.org/abs/2507.21580 https://…

Bondi accretion disk luminosity around neutral and charged Simpson-Visser spacetimes
We investigate relativistic Bondi accretion in the Simpson-Visser spacetime, which, via a single parameter $\ell$, interpolates between the Schwarzschild, regular black hole, extremal and wormhole regimes. First, we analyze the neutral Simpson-Visser geometry, recovering Schwarzschild at $\ell=0$, and then its charged extension of the Reissner-Nordström metric. In both these cases, we derive the conservation equations and analyze two representative fluid models: a barotropic perfect fluid and …

Exact Analytical Traversable Wormhole Solutions in Teleparallel $F(T)$ Gravity with the de Rham-Gabadadze-Tolley Massive Graviton Sector
Alexandre Landry, Yassine Sekhmani, Emmanuel N. Saridakis, Sunil K Maurya, Akram Ali
https://arxiv.org/abs/2508.06290

Exact Analytical Traversable Wormhole Solutions in Teleparallel $F(T)$ Gravity with the de Rham-Gabadadze-Tolley Massive Graviton Sector
In this paper, we derive a novel class of exact, static, spherically symmetric traversable wormhole solutions in teleparallel $F(T)$ gravity augmented by the non-linear de Rham-Gabadadze-Tolley (dRGT) graviton mass term. By using the Morris-Thorne ansatz with a generalized redshift function including constant, logarithmic, and power-law profiles, we rigorously integrate the dRGT-modified conservation laws together with the teleparallel field equations to reconstruct both the shape function $b(r…

Short-Range Approximation to Casimir Wormholes Inspired by Scalar and Electric Fields
Remo Garattini, Athanasios G. Tzikas
https://arxiv.org/abs/2507.19134 https://

Short-Range Approximation to Casimir Wormholes Inspired by Scalar and Electric Fields
We investigate a static traversable wormhole sustained by a combination of a minimally coupled scalar field and an electric field, with exotic matter sourced by Casimir energy. Considering two scenarios, where the Casimir plate separation is either radially variable or fixed, we derive analytical near-throat solutions for both massless and massive scalar fields. To ensure consistency of the field equations, a thermal tensor is also incorporated, consisting solely of pressure terms that vanish a…

Statistics in 3d gravity from knots and links
Jeevan Chandra
https://arxiv.org/abs/2508.10864 https://arxiv.org/pdf/2508.10864

Statistics in 3d gravity from knots and links
In recent years, there has been remarkable progress in evaluating wormhole amplitudes in 3d Einstein gravity with negative cosmological constant and matching them to statistics of 2d CFT data. In this work, we compute non-perturbative Gaussian and non-Gaussian gravitational contributions to the OPE statistics using a framework that can systematically generate a class of such non-perturbative effects - \textit{Fragmentation of knots and links by Wilson lines}. We illustrate this idea by construc…

Observing an accretion disk inside a wormhole shadow
I. D. Novikov, S. V. Repin, D. A. Paksivatova
https://arxiv.org/abs/2508.02752 https://arxiv.org/pdf/2…

Observing an accretion disk inside a wormhole shadow
The paper considers the problem of the possibility of observing an accretion disk through the throat of the Ellis-Bronnikov-Morris-Thorne wormhole. It is shown that this image has a complex structure and is fundamentally different from the image of an accretion disk around a black hole. Images of the accretion disk are presented at various angles between the plane of the disk and the observer's line of sight.

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 …

Wormholes with low energy density
Peter K. F. Kuhfittig
https://arxiv.org/abs/2508.06597 https://arxiv.org/pdf/2508.06597

Wormholes with low energy density
In spite of their speculative nature, traversable wormholes are a topic of interest that started with the Einstein-Rosen bridge in 1935 and became a major research area with the introduction of the Morris-Thorne wormhole in 1988. It is also become apparent in time that such wormholes are likely to be compact stellar objects, akin to neutron stars. Although widely discussed, wormholes having a low energy density may therefore not be massive enough to exist on a macroscopic scale. Important examp…

Quasinormal spectra of a wormhole family: overtone features and a parameter-controlled redshift
Abhisek Barman Maji (Indian Institute of Technology Kharagpur, India), Sayan Kar (Indian Institute of Technology Kharagpur, India)
https://arxiv.org/abs/2506.09860

Quasinormal spectra of a wormhole family: overtone features and a parameter-controlled redshift
Though investigated extensively in the past, we take a detailed relook at the study of quasinormal modes (QNM) in a known family of wormholes (ultrastatic ($g_{00}=-1$), as well as spacetimes with different, non-constant $g_{00}$), which includes the familiar Bronnikov-Ellis spacetime as a special case. Our focus here is to go beyond the fundamental mode and obtain some of the QNM overtones using a suitable numerical scheme. Scalar and axial gravitational QNMs including two or three overtones a…

Evaporating Universes
Divij Gupta
https://arxiv.org/abs/2507.05363 https://arxiv.org/pdf/2507.05363

Evaporating Universes
Recent work by Headrick, Sasieta and myself provides an extension of the HRT formula for asymptotically flat spacetimes. I use this formula to construct a holographic model of black hole evaporation in four-dimensional asymptotically flat spacetimes using Brill-Lindquist (BL) wormholes. The wormhole is interpreted via ER=EPR to represent the entanglement geometry between an evaporating black hole and baths into which the Hawking radiation is collected. Applying HRT, I compute the entanglement e…

This https://arxiv.org/abs/2412.08693 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Random Circuits in the Black Hole Interior
In this paper, we present a quantitative holographic relation between a microscopic measure of randomness and the geometric length of the wormhole in the black hole interior. To this end, we perturb an AdS black hole with Brownian semiclassical sources, implementing the continuous version of a random quantum circuit for the black hole. We use the random circuit to prepare ensembles of states of the black hole whose semiclassical duals contain Einstein-Rosen (ER) caterpillars: long cylindrical w…

Traversable Kaluza-Klein wormholes?
Christopher Simmonds (Victoria University of Wellington), Matt Visser (Victoria University of Wellington)
https://arxiv.org/abs/2508.02824 ht…

Traversable Kaluza-Klein wormholes?
Various authors have suggested that Kaluza--Klein variants of traversable wormholes might to some extent ameliorate the defocussing properties (the curvature condition violations, and implied energy condition violations) inherent in positing the existence of a traversable wormhole throat. We shall show that in a Kaluza--Klein context the price paid for completely eliminating the defocussing properties of the wormhole throat is extremely high -- the 5th dimension has to become truly enormous (fo…

Periodic equatorial orbits in a black bounce scenario
Anderson Bragado, Gonzalo J. Olmo
https://arxiv.org/abs/2506.15600 https://arxi…

Periodic equatorial orbits in a black bounce scenario
We study equatorial closed orbits in a popular black bounce model to see if the internal structure of these objects could lead to peculiar observable features. Paralleling the analysis of the Schwarzschild and Kerr metrics, we show that in the black bounce case each orbit can also be associated with a triplet of integers which can then be used to construct a rational number characterizing each periodic orbit. When the black bounce solution represents a traversable wormhole, we show that the pre…

Deflection of light by dark matter supporting traversable wormholes in the framework of Kalb-Ramond gravity
Susmita Sarkar, Nayan Sarkar
https://arxiv.org/abs/2507.12970

Deflection of light by dark matter supporting traversable wormholes in the framework of Kalb-Ramond gravity
This study explores the possible formation of asymptotically flat traversable wormholes within dark matter halos under the framework of Kalb-Ramond gravity. The wormhole solutions are derived based on the King and Navarro-Frenk-White dark matter density profiles associated with anisotropic matter sources. For a particular set of parameters, the proposed shape functions are found to be positively increasing and satisfy all the essential geometric conditions along with the flare-out condition, th…

Quasi-normal modes and echoes of generalized black hole bounces and their correspondence with shadows
Albert Duran-Cabac\'es, Diego Rubiera-Garcia, Diego S\'aez-Chill\'on G\'omez
https://arxiv.org/abs/2506.10814

Quasi-normal modes and echoes of generalized black hole bounces and their correspondence with shadows
We study the quasi-normal modes (QNMs) of a family of generalized black bounces interpolating between regular black holes and traversable wormhole solutions according to a single extra parameter $a$. Firstly, working with a generic spherically symmetric space-time with arbitrary radial function and an anisotropic fluid matter source, the general equations for the gravitational waves are obtained. Then, we focus on such particular space-time metric and use the time-domain method to find the evol…

Non-stationary wormholes with the presence of scalar fields and modified gravity
G. Alencar, R. D\'arlla, Shin'ichi Nojiri, Sergei D. Odintsov, Diego S\'aez-Chill\'on G\'omez
https://arxiv.org/abs/2508.05536

Non-stationary wormholes with the presence of scalar fields and modified gravity
Some novel regular spacetimes are considered that show a non-stationary wormhole structure. A Simpson-Visser-like procedure is applied to reconstruct these regular spacetimes, free of time-like and space-like singularities. Such a procedure is also applied to describe a regular cosmological expansion, where the universe reaches a minimum scale and then rebounds. This type of regular spacetime is achieved by considering some scalar fields as sources, with the appropriate kinetic term and scalar …