Novel black-bounce spacetimes: wormholes, regularity, energy conditions, and causal structure

Abstract

We develop a number of novel "black-bounce" spacetimes. These are specific regular black holes where the "area radius" always remains non-zero, thereby leading to a "throat" that is either timelike (corresponding to a traversable wormhole), spacelike (corresponding to a "bounce" into a future universe), or null (corresponding to a "one-way wormhole"). We shall first perform a general analysis of the regularity conditions for such a spacetime, and then consider a number of specific examples. The examples are constructed using a mass function similar to that of Fan--Wang, and fall into several particular cases, such as the original Simpson--Visser model, a Bardeen-type model, and other generalizations thereof. We shall analyse the regularity, the energy conditions, and the causal structure of these models. The main results are several new geometries, more complex than before, with two or more horizons, with the possibility of an extremal case. We shall derive a general theorem regarding static space-time regularity, and another general theorem regarding (non)-satisfaction of the classical energy conditions.

V1: 26 pages, 13 figures. V2: Still 26 pages, 13 figures; 7 references added, plus some historical comments. No physics changes. V3: Now 27 pages, still 13 figures. Title change, new section on volume quantifier integral on pg 8, new calculation Eq.~(56) on pg 10, additional discussion pg 11, 2 new references added, bibliography tidied

References in corpus (37)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Traversable wormholes: Some simple examples
• Traversable wormholes from surgically modified Schwarzschild spacetimes
• Rotating regular black holes
• Construction of Regular Black Holes in General Relativity
• Prospects for Fundamental Physics with LISA
• Regular black holes with a nonlinear electrodynamics source
• Generating rotating regular black hole solutions without complexification
• Rotating Regular Black Hole Solution
• Energy conditions in the epoch of galaxy formation
• Generalized energy conditions in Extended Theories of Gravity
• Warp drive basics
• Regular black holes and black universes
• Regular black holes in quadratic gravity
• Geodesically complete black holes
• Generalized Misner-Sharp quasi-local mass in Einstein-Gauss-Bonnet gravity
• Gravastars supported by nonlinear electrodynamics
• Physical observability of horizons
• Vaidya spacetimes, black-bounces, and traversable wormholes
• Dynamic thin-shell black-bounce traversable wormholes
• Interior of a Schwarzschild black hole revisited
• Comment on "Construction of regular black holes in general relativity"
• Nonsingular black holes in nonlinear gravity coupled to Euler-Heisenberg electrodynamics
• Regular Black Holes in Rainbow Gravity
• Regular multihorizon black holes in $f(G)$ gravity with nonlinear electrodynamics
• Buchdahl-like transformations for perfect fluid spheres
• Cosmodynamics: Energy conditions, Hubble bounds, density bounds, time and distance bounds
• Cosmological milestones and energy conditions
• Regular Rotating Black Holes: A Review
• On the (non)genericity of the Kiselev spacetime
• Resolution of Reissner-Nordström singularities by higher-derivative corrections

Cited by in corpus (116)

• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• A novel family of rotating black hole mimickers
• Field sources for Simpson-Visser space-times
• Charged black-bounce spacetimes
• Generalized uncertainty principle corrections in Rastall-Rainbow Casimir wormholes
• Strong gravitational lensing by rotating Simpson--Visser black holes
• Shadows and photon rings of regular black holes and geonic horizonless compact objects
• Analytical study of gravitational lensing in Kerr-Newman black-bounce spacetime
• Scalar perturbations around rotating regular black holes and wormholes: quasi-normal modes, ergoregion instability and superradiance
• Thin accretion disk in the Simpson-Visser black-bounce and wormhole spacetimes
• On black bounces, wormholes and partly phantom scalar fields
• Source of black bounces in general relativity
• Towards a Non-singular Paradigm of Black Hole Physics
• Retrolensing by two photon spheres of a black-bounce spacetime
• Coincident f(Q) gravity: black holes, regular black holes and black bounces
• A review on analytical studies in Gravitational Lensing
• Quasinormal modes and gray-body factors of regular black holes in asymptotically safe gravity
• Echoes of novel black-bounce spacetimes
• Charged black-bounce spacetimes: Photon rings, shadows and observational appearances
• On black bounce space-times in non-linear electrodynamics
• Rotating spacetime: black-bounces and quantum deformed black hole
• Black bounces in conformal Killing gravity
• Echoes from Asymmetric Wormholes and Black Bounce
• Formation and evaporation of quantum black holes from the decoupling mechanism in quantum gravity
• Bardeen solution with a cloud of strings
• Black-Bounce in $f(T)$ Gravity
• Weak Deflection Angle, Hawking Radiation and Greybody Bound of Reissner-Nordström Black Hole Corrected by Bounce Parameter
• Black Bounces with multiple throats and anti-throats
• Generalized models for black-bounce solutions in $f(R)$ Gravity
• Testing regular black holes with X-ray and GW data
• Cylindrical black bounces and their field sources
• Echoes from braneworld wormholes
• Disformal Transition of a Black Hole to a Wormhole in Scalar-Tensor Horndeski Theory
• Hawking-Ellis classification of stress-energy: test-fields versus back-reaction
• Quasi-local masses and cosmological coupling of black holes and mimickers
• Gravitational lensing of massive particles by a black-bounce-Schwarzschild black hole
• Newman-Janis algorithm's application to regular black hole models
• Evaporation of a Kerr-black-bounce by emission of scalar particles
• A topologically charged four-dimensional wormhole and the energy conditions
• Black bounces in Cotton gravity
• New black-to-white hole solutions with improved geometry and energy conditions
• Energy-Momentum Squared Gravity: A Brief Overview
• Geometric surfaces: An invariant characterization of spherically symmetric black hole horizons and wormhole throats
• Violations of the null convergence condition in kinematical transitions between singular and regular black holes, horizonless compact objects, and bounces
• Regular Black Holes and Horizonless Ultra-Compact Objects in Lorentz-Violating Gravity
• Killing horizons and surface gravities for a well-behaved three-function generalisation of the Kerr spacetime
• Birth of baby universes from gravitational collapse in a modified-gravity scenario
• Evaporation and information puzzle for 2D nonsingular asymptotically flat black holes
• Light deflection and gravitational lensing effects inspired by loop quantum gravity
• Bounce corrections to gravitational lensing, quasinormal spectral stability and gray-body factors of Reissner-Nordström black holes
• Singularity resolution and inflation from an infinite tower of regularized curvature corrections
• Through a Black Hole into a New Universe
• Spherically symmetric and static black bounces with multiple horizons, throats, and anti-throats in four dimensions
• Source of black bounces in Rastall gravity
• Black holes, white holes, and near-horizon physics
• Circumventing Quantum Gravity: Black Holes Evaporating into Macroscopic Wormholes
• General class of "quantum deformed" regular black holes
• Orbits around a black bounce spacetime
• Magnetically charged black-bounce solution via nonlinear electrodynamics in a k-essence theory
• Probing the black holes in a dark matter halo of M87 using gravitational wave echoes
• Black-bounce solutions in a k-essence theory under the effects of bumblebee gravity
• Field Sources for $f(R,R_{\mu \nu })$ Black-Bounce Solutions: The Case of K-Gravity
• Simple traversable wormholes violating energy conditions only near the Planck scale
• A regular metric does not ensure the regularity of spacetime
• Echoes and quasi-normal modes of perturbations around Schwarzchild traversable wormholes
• Arbitrary static, spherically symmetric space-times as solutions of scalar-tensor gravity
• Self-Gravitating Matter in Stationary and Axisymmetric Black Hole Spacetimes
• Regular Black Hole Models in the Transition from Baryonic Matter to Quark Matter
• Tidal Stretching and Compression in Black Bounce Backgrounds
• Remarks on the effects of the quintessence on regular black holes
• Periodic equatorial orbits in a black bounce scenario
• Circular light orbits of a general, static, and spherical symmetrical wormhole with $Z_2$ symmetry
• On the Structure of Black Bounces Sourced by Anisotropic Fluids
• Shadows and optical appearance of black bounces illuminated by a thin accretion disk
• Field Sources for Wormholes With Multiple Throats/Anti-throats
• How Much NEC Breaking Can the Universe Endure?
• Constraining the rotating Simpson-Visser spacetime from the observed quasi-periodic oscillations in black holes
• Dyonic regular black bounce solutions in General Relativity
• Supermassive black hole in NGC 4649 (M60) with a dark matter halo: Impact on shadow measurements and thermodynamic properties
• Testing Regular Black Holes with X-ray data of GX 339-4
• Relativistic structure of a supermassive black hole embedded in the dark matter halo of NGC 4649 (M60)
• Is it possible to distinguish between different black hole solutions using the Shapiro time delay?
• Simpson-Visser-AdS Black Holes: Thermodynamics and Binary Merger
• Greybody factor for an electrically charged regular-de Sitter black holes in $d$-dimensions
• Higher-dimensional topologically charged traversable defect wormhole with non-exotic matter
• A new class of anisotropic rotating fluids and some throat-like sources for Kerr metric as examples
• Black hole solutions in Cotton gravity coupled to nonlinear electrodynamics
• Constraints on the Scale Parameter of Regular Black Hole in Asymptotically Safe Gravity from Extreme Mass Ratio Inspirals
• Preliminary analyses on dynamics and thermodynamics of rotating regular black holes
• Exact plane symmetric black bounce with a perfect-fluid exterior obeying a linear equation of state
• Echoes and quasinormal modes of asymmetric black bounces
• Singularity and differentiability at the origin of static and spherically symmetric black holes
• Gravitational lensing by two photon spheres in a black-bounce spacetime in strong deflection limits
• Shadows cast by a class of rotating black bounces with an anisotropic fluid
• Three dimensional black bounces in $f(R)$ gravity
• Black holes and wormholes in Deser-Woodard gravity
• Generalized black-bounces solutions in f(R) gravity and their field sources
• Thermodynamically massless Simpson-Visser black holes
• Horizons, throats and bounces in hybrid metric-Palatini gravity with a non-zero potential
• Light propagation and quasinormal modes of a topologically charged Schwarzschild-Klinkhamer wormhole
• Regular Black Holes in General Relativity from Nonlinear Electrodynamics with de Sitter Cores
• Energy conditions in static, spherically symmetric spacetimes and effective geometries
• Formation of gravastars
• Light ring images of double photon spheres in black hole and wormhole space-times
• Bardeen-Kiselev black hole with cosmological constant
• Thermodynamic Phase Transitions and Quantum Entropy Corrections in the Simpson-Visser Regular Black Hole
• Imprints of quantum vacuum fluctuations on the gravitational field of a spherical mass
• Macroscopic backreaction of the trace anomaly on classical vacuum backgrounds
• Effective models of non-singular quantum black holes
• Sources of matter for wormholes in a k-essence theory
• Black bounces as magnetically charged phantom regular black holes in Einstein-nonlinear electrodynamics gravity coupled to a self-interacting scalar field
• Strong field gravitational lensing of particles by a black-bounce-Schwarzschild black hole
• Traversable Wormholes induced by polytropic $n=1$ energy density
• Hawking-Ellis type of matter on Killing horizons in symmetric spacetimes
• LQG inspired spacetimes as solutions of the Einstein equations
• The eye of the storm: A regular Kerr black hole