Tootfinder

Wormholes in Einstein-Dirac-Maxwell theory with identical spacetime asymptotics
Vladimir Dzhunushaliev, Vladimir Folomeev, Nurzada Beissen, Adilet Nurmukhamedov
https://arxiv.org/abs/2510.03656

Wormholes in Einstein-Dirac-Maxwell theory with identical spacetime asymptotics
Within general relativity, we study spherically symmetric configurations with wormhole topology consisting of spinor fields and a Maxwell electric field. For such a system, we construct complete families of regular asymmetric solutions describing wormholes connecting two identical Minkowski spacetimes. The physical properties of such systems are completely determined by the values of three input quantities: the throat parameter, the spinor frequency, and the coupling constant. Depending on the …

Are $S^1\times S^2$ wormholes generic with large sources?
Xiaoyi Liu, Donald Marolf, Jorge E. Santos
https://arxiv.org/abs/2510.01325 https://arxiv.org/pdf…

Are $S^1\times S^2$ wormholes generic with large sources?
Euclidean path integrals can be used to prepare states of a Lorentzian QFT. So long as any sources are turned off on the $t=0$ surface, the resulting Lorentzian states all belong to the same Hilbert space. Constructing more states than allowed by the Lorentzian density of states means that the resulting states must be linearly dependent. For large amplitude sources and a fixed cutoff on energy, the AdS bulk dual of this effect has been conjectured to be captured by spacetime wormholes. Wormhole…

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…

Wormhole-Induced correlation: A Link Between Two Universes
Zhilong Liu, Wentao Liu, Xiaofang Liu, Jieci Wang
https://arxiv.org/abs/2510.04005 https://arxiv…

Wormhole-Induced correlation: A Link Between Two Universes
Motivated by the profound connection between quantum mechanics and spacetime geometry, particularly the conjectured correspondence between wormholes and quantum entanglement as proposed in the ER=EPR framework, this study aims to investigate the influence of wormhole geometries on quantum information extraction. We examine the correlation-specifically mutual information (MI) and entanglement-extracted by two Unruh-DeWitt (UDW) detectors from the quantum vacuum field in the presence of a BTZ wor…

Stringy algebras, stretched horizons, and quantum-connected wormholes
Aidan Herderschee, Jonah Kudler-Flam
https://arxiv.org/abs/2510.01556 https://arxiv.o…

Stringy algebras, stretched horizons, and quantum-connected wormholes
While the supergravity limit of AdS/CFT has been extensively explored, the regime in which stringy dynamics dominate, characterized by the emergence of an infinite tower of higher-spin massive modes, is far less understood. In this work, we leverage techniques from algebraic quantum field theory to investigate the extent to which hallmark features of bulk gravity survive at finite string tension and the emergence of intrinsically stringy phenomena. Working in the $g_s\rightarrow 0$ limit, we mo…

Quadrupole perturbations of slowly spinning Ellis-Bronnikov wormholes
Bahareh Azad, Jose Luis Bl\'azquez-Salcedo, Fech Scen Khoo, Jutta Kunz, Francisco Navarro-L\'erida
https://arxiv.org/abs/2509.22118

Quadrupole perturbations of slowly spinning Ellis-Bronnikov wormholes
We study the axial and polar perturbations of slowly rotating Ellis-Bronnikov wormholes in General Relativity, applying a perturbative double expansion. In particular, we derive the equations for $l=2$, $M_z=2$ perturbations of these objects which are parametrized by an asymmetry parameter. The equations constitute an astrophysically interesting sector of the perturbations that contribute dominantly to the gravitational wave radiation. Moreover, calculation of these modes may exhibit potential …

Euclidean Wormholes and Gravitational States
Alexandre Belin
https://arxiv.org/abs/2508.14165 https://arxiv.org/pdf/2508.14165

Euclidean Wormholes and Gravitational States
Euclidean wormholes are known to encode important non-perturbative effects in the physics of quantum black holes. In this paper, we discuss the slicing of Euclidean wormholes along a time-reflection symmetric slice which treats half of the Euclidean geometry as a gravitational machinery to produce a semi-classical state. This type of state preparation is different from Hartle-Hawking states prepared with the CFT path integral, such as the thermofield-double state. Nevertheless, the two differen…

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…

Optical signatures of wormholes immersed in realistic dark matter halos
Abdullah Guvendi, Omar Mustafa, Semra Gurtas Dogan, Abdelghani Errehymy
https://arxiv.org/abs/2509.20425 …

Optical signatures of wormholes immersed in realistic dark matter halos
We develop an exact analytic framework for massless scalar-wave propagation in static, spherically symmetric wormholes embedded in realistic dark matter halos. Starting from a general line element with arbitrary redshift and shape functions, we derive the radial Klein-Gordon equation in Schrödinger form, disentangling the effects of gravitational redshift, spatial curvature, and angular momentum. The dynamics reduce to a generalized Helmholtz equation with a space- and frequency-dependent effe…

Charged wormholes can be long-lived
Jose Luis Bl\'azquez-Salcedo, Luis Manuel Gonz\'alez-Romero, Fech Scen Khoo, Jutta Kunz, Pablo Navarro Moreno
https://arxiv.org/abs/2510.11406

Charged wormholes can be long-lived
Ellis-Bronnikov wormholes suffer from an unstable radial mode. Here we investigate the evolution of the unstable mode(s) for charged wormholes. We show that the instability remains in the presence of charge, but exhibits a very fast decrease to zero, suggesting that wormholes that approach a near-extremal metric could be long-lived. For so-called supercritical wormholes, two purely imaginary unstable modes merge and continue with degenerate imaginary parts and opposite real parts. By analogy, w…

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…

Null geodesics and shadows of slowly rotating wormholes immersed in dark matter halos
Abdelghani Errehymy, Abdullah Guvendi, Semra Gurtas Dogan, Omar Mustafa
https://arxiv.org/abs/2509.16739

Null geodesics and shadows of slowly rotating wormholes immersed in dark matter halos
We study slowly rotating traversable wormholes embedded in realistic galactic dark matter halos, including Navarro-Frenk-White (NFW), Bose-Einstein Condensate (Thomas-Fermi, TF), and pseudo-isothermal (PI) profiles. Using the Teo-type rotating wormhole metric, we construct shape functions from halo density distributions and analyze the resulting geometrical properties, such as throat structure, flaring-out conditions, and violations of the null energy condition. We examine null geodesics, effec…

Wormholes: Myth or Reality? Prospects for Future Observations
Subenoy Chakraborty, Madhukrishna Chakraborty
https://arxiv.org/abs/2509.13715 https://arxiv.…

Wormholes: Myth or Reality? Prospects for Future Observations
Traversable wormholes (TWHs) remain one of the most intriguing predictions of General Relativity (GR), offering passage through space-time. However, their existence requires the violation of the null energy condition, making their detection a bit challenging. The essay aims at showing the new avenues probing the observational prospects of TWHs via quasinormal modes and grey body factors, the two fundamental aspects in wave dynamics. The role of QNMs in characterizing the ringdown phase of pertu…

Charged Rotating Casimir Wormholes
Remo Garattini, Athanasios G. Tzikas
https://arxiv.org/abs/2509.15887 https://arxiv.org/pdf/2509.15887

Charged Rotating Casimir Wormholes
We investigate the conditions necessary for the existence of a rotating traversable wormhole by introducing a Casimir source and an external electric field. A viable wormhole solution emerges when the rotation is constant, corresponding to that of an observer in a zero angular momentum frame. Furthermore, a radially dependent rotation is also a feasible solution, provided the angular velocity decreases exponentially as one moves away from the throat.

Local Expansion Mechanisms for Quantum-Scale Wormholes
Philipp Dorau, Albert Much
https://arxiv.org/abs/2509.10137 https://arxiv.org/pdf/2509.10137

Local Expansion Mechanisms for Quantum-Scale Wormholes
Models of quantum spacetime that are consistent with quantum energy inequalities potentially enable the formation of Planck scale wormholes. Building on the proposal of Morris, Thorne, and Yurtsever that such microscopic spacetime structures might be enlarged to macroscopic size, we revisit Roman's analysis of a wormhole in an inflationary de Sitter background. In this context, we introduce a refined quasi-local toy mechanism, which we call the local inflation bubble. This construction inflates…

Non-exotic wormholes in $f(R,L_m)$ gravity
Sara Rastgoo, Foad Parsaei
https://arxiv.org/abs/2510.11487 https://arxiv.org/pdf/2510.11487

Non-exotic wormholes in $f(R,L_m)$ gravity
In the present analysis, we examine the potential existence of generalized wormhole models within the framework of newly developed extended $f(R,L_m)$ gravity. We investigate both a linear model, $f(R,L_m)=αR+βL_m$, and a non-linear model, $f(R,L_m)=\frac{R}{2}+ L^α_m$, to analyze traversable wormholes. By employing the variational approach, we derive modified versions of the field equations under the influence of an anisotropic matter source. A power-law shape function is applied, resulting…

Black holes and wormholes in sourceless three-dimensional conformal Killing gravity
Gerard Clement, Khireddine Nouicer
https://arxiv.org/abs/2508.05218 https://

Black holes and wormholes in sourceless three-dimensional conformal Killing gravity
We derive all the sourceless solutions of three-dimensional conformal Killing gravity with two Killing vectors. Along with singular solutions and BTZ black holes, the stationary solutions include regular warped AdS3 black holes and wormholes.

Gravitational lensing by Lema\^{\i}tre-Tolman-Bondi wormholes in a Friedmann universe
Kirill A. Bronnikov, Valeria A. Ishkaeva, Sergey V. Sushkov
https://arxiv.org/abs/2509.09797

Gravitational lensing by Lema\^ıtre-Tolman-Bondi wormholes in a Friedmann universe
The Lema\^ıtre-Tolman-Bondi (LTB) solution to the Einstein equations describes the dynamics of a self-gravitating spherically symmetric dust cloud with an arbitrary density profile and any distribution of initial velocities, encoded in three arbitrary functions $f(R)$, $F(R)$, and $τ_0(R)$, where $R$ is a radial coordinate in the comoving reference frame. A particular choice of these functions corresponds to a wormhole geometry with a throat defined as a sphere of minimum radius at a fixed ti…

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…

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 …