Wormholes - Science topic

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 fundamenta...

When a system exhibits a bulk gap but gapless edge states (e.g., a symmetry-protected topological phase), the entanglement spectrum (ES) resembles the energy spectrum on virtual edge, that is the Li-Haldane conjecture. In this way, the ES plays an important probe to detect the topological phases according to this bulk-edge correspondence. When a sy...

The Planck scale marks the theoretical boundary where the known laws of physics dissolve into quantum gravity, and the very fabric of spacetime is believed to become granular or emergent. It represents the ultimate frontier of both physics and metaphysics—a limit beyond which matter, energy, and information converge into forms we have yet to compre...

We present a class of Lorentzian traversable wormholes in conformal gravity, constructed via Weyl rescaling of Minkowski spacetime. As a result, these wormholes are solutions of every theory of gravity that is both conformally invariant and admits Minkowski spacetime as a solution. We specifically examine the case of a wormhole possessing a Morris-...

Exotic matter, a hypothetical form of matter with negative energy density, is essential in theoretical constructs such as warp drives and traversable wormholes. This paper proposes a framework for the controlled synthesis of exotic matter using plasma confinement techniques supported by high-density magnetic field manipulation in exoatmospheric env...

A bstract We study multiparty entanglement signals, which are functions of a quantum state that are non-zero only when the state has multiparty entanglement. We consider known signals of three- and four-party entanglement, and propose new signals for four- and higher-party entanglement. We make some remarks on their general properties, but mainly f...

Entanglement islands have played a key role in the recent derivation of the Page curve and other progress on the black hole information problem. Arising from the inclusion of connected wormhole saddles in a gravitational replica trick, islands signal that degrees of freedom in the black hole interior are not microscopically independent of the exter...

Cross-chain bridges are essential for enabling inter-operability between diverse blockchain networks. At the same time, these technologies have introduced new avenues for illicit financial activity, such as chain-hopping, a method used to obscure transactional provenance by rapidly transferring assets across multiple chains. This study analyzes cro...

protocol [30]. Given their dynamic nature and expanding use across diverse domains, the demand for robust security mechanisms in WSNs is becoming increasingly critical. These networks frequently operate in hostile environments where node-to-node communication can be unstable, complicating the deployment of effective security solutions. Safeguarding...

1 Metric Ansatz 2 Traversability 3 ER=EPR Entanglement

We construct an infinite family of semiclassical de Sitter (dS) microstates, realized as backreacted geometries of dS spacetime with a constant tension thin-shell brane located outside the dS event horizon. The contribution of wormholes in semiclassical gravitational path integral computations of overlaps between these microstates implies that they...

In this study, both the evolution of wormholes (by examining both the energy conditions and using the TOV equations) and the effects of the Karmarkar condition on the solutions obtained under certain specific cases were examined in the light of the $f(R,T)$ gravity theory, using two $f(R,T)$ functions predicted to describe the accelerated expansion...

In this paper, we review the suggestion that it is possible to eliminate the Big Bang curvature singularity of the Friedmann cosmological solution by considering a particular type of degenerate spacetime metric. Specifically, we take the four-dimensional spacetime metric to have a space-like three-dimensional defect with a vanishing determinant of...

The widespread adoption of Internet of Things (IoT) networks has introduced new cybersecurity challenges, particularly wormhole attacks. These attacks pose a significant threat to IoT environments by manipulating network routing without altering packet contents, making them difficult to detect using traditional intrusion detection systems (IDS). Th...

We investigate the space-time geometry generated by compact objects in (2+1)-dimensional Bopp–Podolsky electrodynamics. Inspired by previous studies where the Bopp–Podolsky field acts as a source for spherically symmetric solutions, we revisit this question within the lower-dimensional (2+1) framework. Using a perturbative approach, we derive a cha...

In the late 1980s, Morris and Thorne led in theoretical physics by creating solutions to wormholes and formulating the crucial requirements for safe traversability of wormholes. They found that exotic matter must meet the requirement $P_r + \rho < 0$, where $P_r$ is radial pressure and $\rho$ is energy density. This is a rudimentary grasp of our un...

Previous studies of linearized stability of asymptotically flat Euclidean axion wormholes found that symmetric modes suffered from divergences. We show that such divergences were an artifact of a particular way of solving the constraints, and that a full treatment leads to finite actions for such modes. The modes must thus be included in a stabilit...

This seminar will be on static radial-dependent spherically symmetric teleparallel F(T) gravity solutions for perfect fluid and scalar field Dark Energy sources. We begin by the presentation of static field equations (FEs) and conservation laws solutions for perfect fluids and scalar field sources. After simplifications of FEs, we present some typi...

We provide a derivation of the Ryu-Takayanagi (RT) formula in 3D gravity for generic boundary subsystems--including RT surface phase transitions--directly from the dual two-dimensional conformal field theory (CFT). Our approach relies on the universal statistics of the algebraic conformal data and the large-$c$ behavior of conformal blocks with Car...

It is known that in the presence of Euclidean wormholes the vacuum state is unstable, which, in general, leads to a number of phase transitions in the early Universe. According to the Kibble scenario during the phase transitions, defects of the domain-wall-type were formed. The specific feature of Euclidean wormholes is that a part of defects posse...

We construct static, spherically symmetric, charged traversable wormhole solutions to the Einstein--Maxwell equations, supported by bidirectional (ingoing and outgoing) null dust with negative energy, and discuss a scenario for their dynamical formation from a black hole. Our solution contains a traversable throat, where the areal radius takes a mi...

We study how meaningful physical predictions can arise in nonperturbative quantum gravity in a closed Lorentzian universe. In such settings, recent developments suggest that the quantum gravitational Hilbert space is one-dimensional and real for each $\alpha$-sector, as induced by spacetime wormholes. This appears to obstruct the conventional quant...

We show that non-minimal coupling between matter and geometry can indeed help in constructing stable, traversable, wormholes (WHs) without requiring exotic matter under certain conditions. In models like $f({\cal Q},{\cal T})={\cal Q}+\beta {\cal T}$ gravity, where ${\cal Q}$ is the non-metricity scalar, and ${\cal T}$ is the trace of the energy-mo...

We investigate the revised Deser-Woodard model of nonlocal gravity involving four auxiliary scalar fields, introduced to explain the standard cosmological background expansion history without fine-tuning issues. In particular, we simplify the complex field equations within a proper tetrad frame, thereby recasting the original system into a more tra...

Wireless Sensor Networks (WSNs) are increasingly pivotal in applications such as environmental monitoring, smart cities, and healthcare, yet their widespread use introduces significant security challenges. These challenges arise due to the inherent vulnerabilities of WSNs, including their wireless communication medium and limited resources. Key sec...

In this study, the geodesic motion of a test particle along with its confinement is investigated within cylindrically symmetric wormhole space–time admitting to closed timelike curves. The confinement of particles with or without angular momentum is also investigated. It is found that particles with positive angular momentum that co-rotates with th...

In 2005 Zakharov et al. predicted an opportunity to reconstruct a shadow in Sgr A* with ground based or space—ground interferometer acting in mm or sub-mm band (the Millimetron was mentioned for such needs). The prediction was confirmed in May 2022 since the Event Horizon Telescope (EHT) Collaboration presented results of a shadow reconstruction fo...

The shadows and photon spheres are investigated for both static and rotating traversable wormholes. In particular, with a red-shift function constructed in combination with two distinct shape functions, the null geodesic equation is found to predict the light trajectory. To explore observable phenomena and gain a deeper understanding of the gravita...

The landscape of gravitational physics has been reshaped by the exploration of Extremely Compact Objects (ECOs)-theoretical astrophysical entities that exhibit compactness comparable to or even exceeding that of black holes, without possessing event horizons. This study delves into the behaviour, structure, and dynamics of ECOs in regimes of extrem...

Prelude to the Insertion As John Wheeler envisioned, the vacuum at the Planck scale is no serene emptiness but a seething, jittery, frothing expanse of virtual particles, temporary wormholes, and geometric oscillations-the Quantum Foam. In this theatre, the distinction between black hole and not-quite-black-hole blurs; the "horizon" becomes porous,...

We present a complete and exact derivation of nine key results in black hole physics, all emerging from a unified variable-order fractional calculus (VOFC) framework incorporating projectional geometry and memory kernels. This model resolves curvature singularities, preserves unitarity across horizons, reproduces thermodynamic entropy from mode den...

Black holes (BHs), the quintessential predictions of general relativity, are defined by event horizons and singularities. However, in recent years, alternative compact objects (ACOs)-such as grava stars, boson stars, wormholes, and fuzzballs-have been proposed that mimic the external spacetime geometry of black holes, particularly in their asymptot...

We present a family of charged, traversable wormhole solutions in the presence of a cosmological constant. In de Sitter spacetime, two types of wormhole throats can exist--referred to as typical and cosmological throat--located at small and large radial values, respectively. In anti-de Sitter spacetime, the throat geometry allows for positive, zero...

In this paper, we present some analytic solutions of wormhole in four-dimensional Robertson–Walker Euclidean background with a function f(G), where G is Gauss–Bonnet curvature and a k-essence field for k = 0. The solutions are obtained assuming an ansatz on f(G) with some additional assumptions on potential of the dilaton field and energy density o...

In the paper, we obtain a spherically symmetric traversable wormhole (WH) in 4D Einstein-Gauss-Bonnet (EGB) gravity with Bose-Einstein condensated (BEC) dark matter. We consider 4D EGB gravity, which one obtains by regularizing the higher dimensional EGB gravity in the limit $D \to 4$. The Gauss-Bonnet coupling parameter ($\alpha$) in this case is...

Unmanned Aerial Vehicles (UAVs), also known as drones, have gained popularity in various fields such as agriculture, emergency response, and search and rescue operations. UAV networks are susceptible to several security threats, such as wormhole, jamming, spoofing, and false data injection. Time Delay Attack (TDA) is a unique attack in which malici...

In this work we study gravitational lensing of the wormhole in the Eddington-inspired Born-Infeld (EiBI) spacetime that incorporates with a cosmic string. It was found that the presence of cosmic string can enhance the light deflection in strong field limit, compared to the case of the Eills-Bronnikov wormhole. The magnification effects of this com...

This paper proposes a framework uniting prime number distribution, six-dimensional spacetime structure, and quantum entanglement. By utilizing Internal Digit Sum (INDS) classification, we show that prime numbers distribute into six residue classes modulo nine, with classes 3, 6, and 9 notably absent of primes, except for 3. Prime gaps reveal geomet...

We investigate the possibility of obtaining traversable wormholes supported by phantom scalar fields in Lorentz-violating gravity with an antisymmetric rank-2 tensor with a non-zero vacuum expectation value non-minimally coupled to the curvature tensor. This Lorentz violation framework shows to be a suitable scenario to search for wormhole solution...

This study investigates the applicability of Pad\'e approximants in constructing suitable shape functions for traversable wormholes, emphasizing their ability to satisfy essential geometric constraints. By analyzing low-order Pad\'e approximants, we demonstrate their effectiveness in transforming inadequate shape functions into physically consisten...

We consider configurations consisting of a gravitating nonlinear spinor field and a massless ghost scalar field providing a nontrivial spacetime topology. For such a mixed system, we have constructed families of asymptotically flat asymmetric solutions describing Dirac stars with wormhole topology. The physical properties of such systems are comple...

This thesis explores traversable wormhole (WH) solutions within symmetric teleparallel gravity and its extensions, including $f(Q)$ and $f(Q, T)$ gravity. Chapter I reviews WH geometry and properties, general relativity, and modified gravity's role in WH physics. Chapter II constructs WHs in $f(Q)$ gravity using dark matter profiles like Pseudo-Iso...

A bstract We study a model for the initial state of the universe based on a gravitational path integral that includes connected geometries which simultaneously produce bra and ket of the wave function. We argue that a natural object to describe this state is the Wigner distribution, which is a function on a classical phase space obtained by a certa...

We present orthogonality relations for quasinormal modes of a wide class of asymptotically AdS black holes. The definition is obtained from a standard product, modified by a CPT operator and placed on a complex radial contour which avoids branch points of the modes. They are inspired by existing constructions for de Sitter and Kerr spacetimes. The...

This white paper introduces Phase Time as a groundbreaking theoretical advancement in the understanding of temporal dynamics-positioning time not as a linear progression or merely a relativistic dilation, but as a harmonic, ripple-based phenomenon interwoven into the fabric of quantum and gravitational fields. Building upon and expanding Einstein's...

Invoking the Klebanov-Susskind-Banks Euclidean wormhole as a bridge, we investigate the power spectrum and the entanglement between two pair-created universes. We construct a suitable global vacuum for the perturbations of the inflaton field in the Euclidean regime, which becomes a mixed state when restricted to one of the paired universes. This mi...

A bstract We study the general framework of effective theories obtained via exact path integration of a complete theory over some sector of its degrees of freedom. Theories constructed this way contain multi-integrals which couple fields arbitrarily far apart, and in certain settings even on path-disconnected components of the space. These are not...

In this Comment, we address a significant flaw in the analysis by Zubair and Farooq regarding Casimir wormhole solutions within Einstein–Gauss–Bonnet (EGB) gravity. Their reliance on four-dimensional Casimir energy and pressure sources contradicts the framework that requires $$D\ge 5$$ D ≥ 5 .

We construct a model for the nucleation of a wormhole within a Lorentzian spacetime by employing techniques from topological surgery and Morse theory. In our framework, a $0$-surgery process describes the neighborhood of the nucleation point inside a compact region of spacetime, yielding a singular Lorentzian cobordism that connects two spacelike r...

We calculate quasinormal modes and gray-body factors of a massive scalar field in the background of three compact objects in the Weyl gravity: Schwarzschild-like back holes, known as Mannheim–Kazanas solution, non-Schwrazschild-like black holes and traversable wormholes found recently in (Jizba and Mudruňka in Phys Rev D 110(12):124006, 2024, https...

A bstract The black hole entropy has been observed to generically turn negative at exponentially low temperatures $$ T\sim {e}^{-{S}_0} $$ T ~ e − S 0 in the extremal Bekenstein-Hawking entropy S 0 , a seeming pathology often attributed to missing non-perturbative effects. In fact, we show that this negativity must happen for any effective theory o...

This study explores the characteristics of wormhole geometries within the framework of symmetric teleparallel gravity, specifically $$\mathcal {F}(\mathcal {Q})$$ F ( Q ) gravity. By integrating holographic and mixed dark energy density profiles, we derive exact solutions for wormholes. The analysis focuses on the geometrical aspects of these wormh...

The hypothesis of a white hole actively ejecting all matter and energy through a wormhole was first substantiated by I. Novikov. Let us consider the applicability of the white hole concept to non-relativistic hot stars. For neutral atoms, the star's gravity is insurmountable. In the atmosphere of a hot star containing ionized atoms, a significant d...

Rotating black holes are prevalent in astrophysical observations, and a Kerr-like solution that incorporates quantum gravity effects is essential for constructing realistic models. In this work, we analyze the geodesic motion of massive particles in a Kerr-like polymer spacetime, incorporating quantum corrections via a parameter $A_\lambda$. We dem...

The black hole information loss problem remains one of the most tantalizing paradoxes in theoretical physics, lying at the intersection of general relativity and quantum mechanics. This paper investigates whether the information loss problem is genuinely paradoxical or rather an artifact of incompatible frameworks. We analyse semi-classical argumen...

In this paper, we investigate observational appearances of an asymmetric thin-shell wormhole with the torsion, where the two spacetime regions of this wormhole is constructed by using the cut-and-paste method. In particular, we analyze the effective potentials and null geodesic behaviors, and further establish how photon trajectories depend on the...

Raychaudhuri equation (RE) is a very important equation in gravity and cosmology as it is the key ingredient of the seminal singularity theorems. In this paper, we present a novel method of deriving the RE and restating the famous singularity theorems in GR using the matrix representation of tensor fields. For the first time in the literature, we i...

Wireless ad-hoc networks operate independently of existing infrastructure, using devices like access points to connect end-user computing devices. Current methods face issues such as low detection accuracy, structural deviation, and extended processing times. This paper proposes a cross-layer approach that leverages knowledge from the physical and...

Euclidean anti–de Sitter (AdS) wormholes provide a natural setup for studying the anti–de Sitter/conformal field theory (AdS/CFT) correspondence with multiple boundaries. However, from a bottom-up perspective, they cannot be embedded in the four-dimensional Einstein-AdS-Maxwell theory if these boundaries have positive curvature. Nevertheless, Malda...

We study gravitational lensing by $k-n$ generalized black-bounce space-times both in regimes of weak and strong field approximations. These metrics interpolate between regular black holes and one-way or traversable wormholes. First, we investigate the light-like geodesic trajectories and derive an analytical expression for the deflection angle in t...

This compendium merges every element of our entropic-suppression framework and mode–energy mapping: - Universal 1/E^2 law across black holes, wormholes, gravastars. - Five first-principles derivations (EFT, QFI, Jaynes/Wigner, WKB, holography). - Model extensions capturing a/E^4, continuum backgrounds and resonances. - Spatial/temporal inversion p...

This study presents new spherically symmetric and dynamical wormhole solutions supported by ordinary matter modeled as an anisotropic fluid, exhibiting a traversable nature. To achieve this goal, we adopt different approaches to obtain both evolving static and genuinely dynamical solutions, such as imposing a viable condition on the Ricci scalar, c...

A bstract We consider two complex SYK models entangled in a thermofield double (TFD) state and investigate the effect of one-sided projective measurements. As measurement operator we choose single site charge operators. Performing a measurement results in a non-zero U(1) charge. The entropy curve differs from the previously studied SYK model due to...

A class of $f(R, T)$ theories extends the Einstein-Hilbert action by incorporating a general function of $R$ and $T$, the Ricci scalar and the trace of the ordinary energy-momentum tensor $T_{\mu\nu}$, respectively, thereby introducing a specific modification to the Einstein's field equations based on matter fields. Given that this modification is...

In this work, we consider a static wormhole in Bopp-Podolsky electrodynamics and convert it into its rotating counterpart by reducing it into Morris-Thorne form. We further study the null geodesics and effective potential along with the shadows for inner and outer unstable orbits for specific choices of parameters. It is found that for some cases s...

O presente trabalho analisa o filme Interestelar (2014), dirigido por Christopher Nolan, com o objetivo de identificar questões científicas que possam ser exploradas em sala de aula, contribuindo para a criação de situações desencadeadoras de aprendizagem (SDA) no ensino de Ciências. A pesquisa, de abordagem qualitativa, utiliza a técnica de Anális...

We present a dynamical analysis of the null and timelike geodesics around an asymptotically de Sitter wormhole in a Randall-Sundrum brane. In this framework, the wormhole throat is interpreted both as a photon sphere and as a fixed point of the associated dynamical system. The stability of this structure is evaluated using Lyapunov and Jacobi crite...

In this paper, we investigate the emergence of non-Hermitian phase transitions on a quantum wormhole surface. We consider a single fermion whose dynamics are governed by the Dirac equation confined to move on a quantum wormhole surface. The effects of the geometry are taken into account using the tetrad formalism and the spin connection. The Dirac...

Weyl gravity naturally generates effective dark matter and cosmological constant terms as integration constants, eliminating the need to explicitly introduce them into the theory. Additionally, the framework permits three intriguing solutions for compact objects: an asymptotically de Sitter Schwarzschild-like black hole described by the Mannheim-Ka...

Many papers on modified gravity theories (MGTs), and metric‐affine geometry have been published. New classes of black hole (BH), wormhole (WH), and cosmological solutions involving nonmetricity and torsion fields were constructed. Nevertheless, the fundamental problems of formulating nonmetric Einstein–Dirac–Maxwell (EDM), equations, and study of i...

Many papers on modified gravity theories (MGTs), and metric-affine geometry have been published. New classes of black hole (BH), wormhole (WH), and cosmological solutions involving nonmetricity and torsion fields were constructed. Nevertheless, the fundamental problems of formulating nonmetric Einstein-Dirac-Maxwell (EDM), equations, and studying i...

We prove the uniqueness theorem for static spherically symmetric traversable wormholes with two asymptotically flat ends, constituting the solutions of Einstein-phantom-electric-magnetic equations of motion. For the completeness of the results, we also consider the case of phantom U(1)- gauge field. The key role in the proof is bounded with conform...

Sequential injection acidizing is usually applied for acid diversion and, in recent years, for achieving deep acid penetration in high-temperature reservoirs. However, there is limited research on the impact of this technique on wormholing. Building on a successful application of this technique in a 180 °C carbonate formation, this study investigat...

Closed timelike curves (CTCs) have long presented paradoxes and logical challenges within the context of general relativity. Proposed constructs such as Gödel's rotating universe, the Tipler cylinder, traversable wormholes, and the inner regions of Kerr black holes all theoretically allow CTCs-but only under unphysical assumptions such as infinite...

These days, wireless sensor networks (WSNs) are expanding fast and are used in many fields such as healthcare, battlefields, etc. Depending upon the type of sensor, they are transmitting a considerable amount of data in a short duration, so security is a significant issue while transferring the data. So, it is essential to solve security concerns w...

We propose a quantum gravitational framework in which the Berry curvature-derived from the commutator of covariant derivatives-replaces or complements the Ricci tensor in Einstein's field equations. This curvature arises from a U(1) fiber bundle structure defined over spacetime, encoding geometric phase from evolving quantum states. We construct an...

Recent work has demonstrated that Euclidean Giddings-Strominger axion wormholes are stable in asymptotically flat 4D Minkowski spacetime, suggesting that they should, at least naively, be included as contributions in the quantum gravitational path integral. Such inclusion appears to lead to known wormhole paradoxes, such as the factorization proble...

The apparent causal stability of physical reality, from a human perspective, has persisted throughout recorded history. This, however, has not limited the human imagination, and the question of whether it is possible to defy causality in some way has been a serious consideration amongst scientists and philosophers since the late nineteenth century....

The Meijer Twin Bipolaron model seeks to extend the Standard Models (SMs) in particle physics and in cosmology. This critique focuses on the synthesis of the D.K.F. Meijer Twin Bipolaron (TBP) model as a Gravitation Center (TBPGC) with a revised form of 11-dimensional membrane theory and an emphasis on the holographic principle as applied to the Ad...

The transmission efficiency and power of the existing Magnetically Coupled Resonant Wireless Power Transfer (MCR WPT) system are affected by distance, load, coil, and other factors and cannot reach the optimal state simultaneously. This paper proposes a multi-objective parameter optimization of the system to improve its performance. By analyzing th...

The century-old intellectual, physical, and gedanken confrontations between Albert Einstein and Niels Bohr over the foundations of quantum mechanics remain a defining feature of modern physics. These giants of science set the stage for stimulating conceptual and philosophical thoughts that continued to inspire and challenge practitioners of modern...

Polymer models have been used to describe non-singular quantum black holes, where the classical singularity is replaced by a transition from a black hole to a white hole. In a previous letter, in the context of a uni-parametric model with asymptotic flat exterior metric, we fixed the radius of the transition surface through the identification of it...

We make more specific initial contributions of prior work w.r.t. Tokamaks , relic black holes, and a relationship between a massive graviton particle count and quantum number n, and also add a great more to contributions of our conclusions w.r.t. the wave function of the universe. Our idea for black hole physics being used for GW generation, is usi...

This study aims to investigate the physical properties of wormhole geometry within the context of $f(T,\mathcal{T})$ gravity, which serves as a teleparallel formulation of general relativity. We study a linear model, $f(T,\mathcal{T})=\alpha T+\beta\mathcal{T}$, to explore traversable wormholes. A linear equation of state is utilized for radial pre...

This thesis investigates traversable wormhole spacetimes in modified theories of gravity, where the matter at the wormhole throat is described by an anisotropic energy-momentum tensor. Wormhole solutions are constructed in the context of $f(Q)$ gravity under various equations of state, and their physical viability and stability are thoroughly exami...

Tidal effects related to the traversability across thin shells are examined in spherically symmetric geometries. We focus mainly on shells separating inner from outer regions of gravastars (de Sitter — i.e. Λ>0 — interior and Schwarzschild exterior of mass parameter M), but we also examine other related geometries by including the possibility of a...

A bstract We study (i) Janus deformations and (ii) non-local double trace deformations of a pair of CFTs, as two different ways to construct CFT duals of traversable AdS wormholes. First we construct a simple model of traversable wormholes by gluing two Poincaré AdS geometries and BTZ black holes and compute holographic two point functions and (pse...

This study investigates ray geodesics and wave propagation on the Beltrami surface, with a particular emphasis on the effective potentials governing photon dynamics. We derive the geodesic equations and analyze the Helmholtz equation within this curved geometry, revealing that the resulting potentials are purely repulsive. For ray trajectories, the...

This research makes a strong focus on improving fluid dynamics inside the reservoir after stimulation for enhancing oil and gas well performance, particularly in terms of increasing the Gas–oil ratio (GOR) and injectivity leading to a better productivity index (PI). Advanced stimulation operation using new formulated emulsified acid treatment great...

This paper analyzes the traversable rainbow wormholes with magnetic dust and fluid sources. Morris–Thorne traversable rainbow wormholes are considered with unit lapse to avoid the redshift effects. The field equations are modified and solved to obtain the dynamics of wormholes. The dynamical variables are graphically interpreted. Further, the energ...

A correspondence between two distinct spectral problems, quasinormal modes and grey-body factors, has recently been established for a wide class of black holes. Here, we demonstrate that a similar correspondence exists for a broad class of traversable wormholes and verify it using several well-known examples.

In this work, we investigate wormhole geometries with multiple throats and anti-throats in general relativity. The existence of these structures is identified through the analysis of minima and maxima in the area of the solution. Using embedding diagrams, we visualize the geometry and demonstrate that these objects exhibit a complex structure, dist...

In this work, we investigate the behavior of electromagnetic waves in curved space-time, specifically within the Ellis-Bronnikov-Morris-Thorne-type (EBMT) traversable wormhole geometry, under the combined influence of global monopoles and cosmic strings. We analyze Maxwell's vacuum field equations in this geometry to understand how the wormhole str...

In this work, we investigate the behavior of electromagnetic waves in curved space-time, specifically within the Ellis-Bronnikov-Morris-Thorne-type (EBMT) traversable wormhole geometry, under the combined influence of global monopoles and cosmic strings. We analyze Maxwell’s vacuum field equations in this geometry to understand how the wormhole str...

In this work, we investigate the propagation and behavior of electromagnetic waves in traversable wormhole space-times influenced by topological defects. We focus on two specific scenarios: a Morris-Thorne-type traversable wormhole embedded in a space-time with a global monopole and another with a cosmic string. The primary objective is to examine...

Exotic matter, a term often associated with theoretical physics, particularly in the contexts of general relativity and quantum mechanics, refers to materials or forms of energy that possess unusual properties, such as negative mass, negative energy density, or negative pressure. This paper aims to provide a comprehensive review of the concept of e...

We present a detailed investigation of quasinormal modes (QNMs) for noncommutative geometry-inspired wormholes, focusing on scalar, electromagnetic, and vector-type gravitational perturbations. By employing the spectral method, the perturbation equations are reformulated into an eigenvalue problem over a compact domain, using Chebyshev polynomials...

Black holes have long been a subject of intrigue in astrophysics, with their immense gravitational pull and event horizons marking boundaries of no return. This paper explores the theoretical underpinnings of black holes, the existence of white holes as their possible counterparts, and the concept of wormholes as cosmic shortcuts. Additionally, we...