Congratulations to our #GenRelativGravit Associate Editor Marie Anne Bizouard!

Marco de Cesare

#GenRelativGravit #MeetTheEditors
Marco de Cesare (Naples, Italy) -
Welcome to our new Managing Editor of the journal General Relativity and Gravitation!
link.springer.com/journal/1071...

Interpreting binary neutron star mergers: describing the binary neutron star dynamics, modelling gravitational waveforms, and analyzing detections - General Relativity and Gravitation Gravitational waves emitted from the coalescence of neutron star binaries open a new window to probe matter and fundamental physics in unexplored, extreme regimes. To extract information about the sup...

#ThrowbackThursday Published 5 years ago:
Tim Dietrich, Tanja Hinderer, Anuradha Samajdar. Interpreting binary neutron star mergers: describing the binary neutron star dynamics, modelling gravitational waveforms, and analyzing detections. #GenRelativGravit 53, 27 (2021). doi.org/10.1007/s107...

Results on Lorentzian metric spaces - General Relativity and Gravitation We provide a short introduction to “Lorentzian metric spaces” i.e., spacetimes defined solely in terms of the two-point Lorentzian distance. As noted in previous work, this structure is essentially un...

Ettore Minguzzi. Results on Lorentzian metric spaces. #GenRelativGravit 58, 9 (2026). doi.org/10.1007/s107... Free access: rdcu.be/e0flb
First article of the collection "Geometry, Analysis, and Physics in Lorentzian Signature", ed. by Annegret Burtscher et al.

How Dark is Dark Energy? A Lightcones Comparison Approach - General Relativity and Gravitation We present a detailed analysis that may significantly impact understanding the relationship between structure formation in the late-epoch Universe and dark energy as described by the Friedmann-Lemaîtr...

Mauro Carfora & Francesca Familiari. How Dark is Dark Energy? A Lightcones Comparison Approach. #GenRelativGravit 58, 7 (2026). doi.org/10.1007/s107... Free access: rdcu.be/eZfJv

David Hilditch, GRG Associate Editor

#GenRelativGravit #MeetTheEditors
David Hilditch (@centra-ist.bsky.social Lisbon, Portugal) -
Welcome to our new Associate Editor of the journal General Relativity and Gravitation!
link.springer.com/journal/1071...

screenshot of article page

#ReviewArticle Renata Kallosh & Andrei Linde. On the present status of inflationary cosmology. #GenRelativGravit 57, 135 (2025). doi.org/10.1007/s107... Free access: rdcu.be/eLibs
Part of the GRG "Lemaître Conference 2024" collection: link.springer.com/collections/...

Screenshot: Topical collection “Machine Learning in Gravitational-Wave Science”

#CallforPapers
The journals #GenRelativGravit and #LivingRevRelativ have opened a collection “Machine Learning in Gravitational-Wave Science”, which aims to include review articles and original research: link.springer.com/collections/... #MachineLearning

Plebanśki–Demiański à la Ehlers–Harrison: exact rotating and accelerating type I black holes - General Relativity and Gravitation Recently, it was shown that type D black holes, encompassed in the large Plebanśki–Demiański (PD) family, exhibit a wide class of algebraically general generalizations via the application of Ehlers and Harrison transformations. In this work, we first discuss some mathematical details behind the composition of such transformations, and next, we introduce a qualitative picture of the most general type I generalization of the PD family, dubbed “Enhanced Plebanśki–Demiański” spacetime. We provide the exact form of the solution in the original PD coordinates, obtained via the simultaneous action of an Ehlers and a Harrison transformation on the vacuum PD geometry. In order to make the physics more transparent, we explicitly construct a rotating and accelerating black hole which further has NUT parameter and electric charges, both of them entering, not only the event horizon, but the Rindler horizon as well. This solution is directly obtained in the “physical” coordinates recently proposed by Podolský and Vrátny. Finally, a pedagogical appendix is thoughtfully included, providing readers with a user-friendly step-by-step guide to the Ernst formalism, in an attempt to address and resolve various minor inconsistencies frequently appearing in the relevant literature.

#ThrowBackThursday
José Barrientos, Adolfo Cisterna & Konstantinos Pallikaris. Plebanśki–Demiański à la Ehlers–Harrison: exact rotating and accelerating type I black holes. #GenRelativGravit 56, 111 (2024). doi.org/10.1007/s107... inspirehep.net/literature/2...

Infinity on a Gridshell | Image by Alex Vañó-Viñuales © Image by Alex Vañó-Viñuales

#GenRelativGravit article collection "Hyperboloidal foliations in the era of GW astronomy" published: link.springer.com/journal/1071...
Read the summary by David Hilditch, Rodrigo Panosso Macedo, Alex Vañó-Viñuales & Anıl Zenginoğlu. Gen Relativ Gravit 57, 131 (2025). doi.org/10.1007/s107...

book cover

New #book by our #GenRelativGravit Associate Editor:
Sumati Surya (2025). The Causal Set Approach to Quantum Gravity. Lecture Notes in Physics, vol 1036. Springer, Cham. doi.org/10.1007/978-...
#QuantumGravity @springer.springernature.com

Republication of: Electromagnetically coupled broadband gravitational antenna - General Relativity and Gravitation This paper, originally printed 50 years ago, was the first to provide a detailed discussion of the possible design of an interferometric gravitational-wave detector. In particular, unlike any previous...

#InMemoriam Rainer Weiss. Republication of: Electromagnetically coupled broadband gravitational antenna. #GenRelativGravit 54, 153 (2022). doi.org/10.1007/s107... Editorial note by David H. Shoemaker. Gen Relativ Gravit 54, 152 (2022) doi.org/10.1007/s107...

Constraints on Quantum Gravity - General Relativity and Gravitation Recently, it has become increasingly clear that there are constraints on the low-energy effective theories of quantum gravity that cannot be captured by the standard Wilsonian paradigm. For gravitatio...

Hiroshi Ooguri (@Caltech.edu). Constraints on Quantum Gravity. #GenRelativGravit 57, 123 (2025). doi.org/10.1007/s107... #OpenAccess
Part of the "Lemaître Conference 2024" collection: link.springer.com/collections/...

The Dirac equation in general relativity and the 3+1 formalism - General Relativity and Gravitation I present a review of the Dirac equation in general relativity. Although the generalization of the Dirac equation to a curved spacetime is well known, it is not usually part of the standard toolkit of...

Miguel Alcubierre. The Dirac equation in general relativity and the 3+1 formalism. #GenRelativGravit 57, 122 (2025). doi.org/10.1007/s107... #OpenAccess #ReviewArticle by
@miguelalcubierre.bsky.social

Today (Thu, 17 Jul, 1:30pm) at #GR24Amaldi16: István Rácz presents his work on Hyperboloidal initial data without logarithmic singularities. #GenRelativGravit 57, 96 (2025). doi.org/10.1007/s107... in Session 3 - A1.

Plenary Talk

Good morning! #GenRelativGravit Editor Shinji Mukohyama starts the 3rd day of #GR24Amaldi16 with his plenary talk on the Effective Field Theory approach iop.eventsair.com/gr24-amaldi1...

Don't miss today's (Wed, 15 July, 1:30pm) #GR24Amaldi16 talk by Jérémy Besson and read their #OpenAccess paper:
Jérémy Besson, José Luis Jaramillo. Quasi-normal mode expansions of black hole perturbations: a hyperboloidal Keldysh’s approach. #GenRelativGravit 57, 110 (2025). doi.org/10.1007/s107...

Dynamics of geometric invariants in the asymptotically hyperboloidal setting: energy and linear momentum - General Relativity and Gravitation We investigate the evolution of geometric invariants, as defined by Michel [1], in the context of asymptotically hyperboloidal initial data sets. Our focus lies on the charges of energy and linear mom...

Anna Sancassani and Saradha Senthil Velu. Dynamics of geometric invariants in the asymptotically hyperboloidal setting: energy and linear momentum. #GenRelativGravit 57, 94 (2025). doi.org/10.1007/s107... #OpenAccess

Topical Collection "Black Holes Inside and Out 2024: Visions for the future of black hole physics"

#GenRelativGravit Topical Collection "Black Holes Inside and Out 2024: Visions for the future of black hole physics" is now published — link.springer.com/journal/1071...
On the occasion of #GR24Amaldi16, all articles in this collection are free-to-read from 10 July to 10 August 2025!

Addressing the so called quantum/classical “divide” in gravitational contexts, and its implications in cosmology - General Relativity and Gravitation The manner in which one approaches the interface between gravitation and quantum theory is influenced by one’s posture regarding quantum mechanics and the issues that revolve about its interpretationa...

Rosa-Laura Lechuga-Solis & Daniel Sudarsky. Addressing the so called quantum/classical “divide” in gravitational contexts, and its implications in cosmology. #GenRelativGravit 57, 86 (2025). doi.org/10.1007/s107... #OpenAccess Invited review for the Lemaître 2024 Conference at Vatican Observatory.

Unruh, W.G. Black hole evaporation – 50 years. #GenRelativGravit 57, 78 (2025) doi.org/10.1007/s107... — Part of the (almost completed) collection "Black Holes Inside and Out 2024: Visions for the future of black hole physics" link.springer.com/collections/...

Black hole spectroscopy: status report - General Relativity and Gravitation A brief overview of the “Black hole spectroscopy program” status is presented. Albeit given from a personal angle, it constitutes an attempt to convey the impressive progress achieved within the field...

Gregorio Carullo. Black hole spectroscopy: status report. #GenRelativGravit 57, 76 (2025). doi.org/10.1007/s107... #OpenAccess
Part of the article collection "Black Holes Inside and Out 2024: Visions for the future of black hole physics": link.springer.com/collections/...

A healthier stochastic semiclassical gravity: world without Schrödinger cats - General Relativity and Gravitation Semiclassical gravity couples classical gravity to the quantized matter in meanfield approximation. The meanfield coupling is problematic for two reasons. First, it ignores the quantum fluctuation of ...

Lajos Diósi. A healthier stochastic semiclassical gravity: world without Schrödinger cats. #GenRelativGravit 57, 62 (2025). doi.org/10.1007/s107... #OpenAccess

Based on the author's talk at the Lemaître 2024 conference.

A Spacetime Interpretation of the Confluent Heun Functions in Black Hole Perturbation Theory | Hyperboloidal March 2025 Virtual Infinity Seminar by Marica Minucci (Niels Bohr Institute)

Next Virtual Infinity Seminar (14 Mar 2025 at 14:00 UTC) hyperboloid.al/event/25-03-... – Marica Minucci presents her work with Rodrigo Panosso Macedo "The confluent Heun functions in black hole perturbation theory: a spacetime interpretation". #GenRelativGravit 57, 33 (2025) doi.org/10.1007/s107...

This article is part of the upcoming collection: "Black Holes Inside and Out 2024: Visions for the future of black hole physics", edited by Vítor Cardoso & Raúl Carballo-Rubio: link.springer.com/collections/... #GenRelativGravit #BlackHoles

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#CallForPapers "Geometry, Analysis, and Physics in Lorentzian Signature": This #GenRelativGravit article collection is based on peer-reviewed contributions from the scientific meeting held at the IMAG from 5 to 9 May 2025
link.springer.com/collections/...

Quantum theory of the Lemaître model for gravitational collapse - General Relativity and Gravitation We investigate the quantum fate of the classical singularities that occur by gravitational collapse of a dust cloud. For this purpose, we address the quantization of a model first proposed by Georges ...

Claus Kiefer & Hamid Mohaddes. Quantum theory of the Lemaître model for gravitational collapse. #GenRelativGravit 57, 26 (2025). doi.org/10.1007/s107... #OpenAccess Part of the "Lemaître Conference 2024" article collection: link.springer.com/collections/...

Abstract: We present a review of concepts of thermodynamic of spacetime that allows for an understanding of the gravitational dynamics encoding in it, discussing also the recovery of Weyl transverse gravity instead of General Relativity. We also discuss how these tools can provide some hints in the search of quantum gravity phenomenology, by introducing a formalism to analyze low-energy quantum gravity modifications in a completely general framework based on the thermodynamics of spacetime. For that purpose, we consider quantum gravity effects via a parametrized modification of entropy by an extra logarithmic term in the area, predicted in most of the different approaches to quantum gravity. These results provide a general expression for quantum phenomenological equations of gravitational dynamics.

Final contribution from #EREP2023:
Ana Alonso-Serrano & Marek Liška. Thermodynamics as a framework for understanding gravitational dynamics and quantum gravity. #GenRelativGravit 57, 10 (2025). doi.org/10.1007/s107... link.springer.com/collections/...
#OpenAccess #Review

Abstract: This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emergent cosmology. It explores four key research areas: (a) the interplay between hydrodynamics and cosmology, including analog gravity systems; (b) phase transitions, continuum limits and emergent geometry in quantum gravity; (c) relational perspectives in gravity and quantum gravity; and (d) the emergence of cosmological models rooted in quantum gravity frameworks. Each contribution presents the distinct perspectives of its respective authors. Additionally, the introduction by the editors proposes an integrative view, suggesting how these thematic units could serve as foundational pillars for a novel theoretical cosmology framework termed “hydrodynamics on superspace”.

#Perpective Ben Achour, J., Benedetti, D., Bojowald, M. et al. Quantum gravity, hydrodynamics and emergent cosmology: a collection of perspectives. #GenRelativGravit 57, 2 (2025). doi.org/10.1007/s107... Free access: rdcu.be/d38dZ #ReviewArticle

Hawking radiation with pure states - General Relativity and Gravitation Hawking’s seminal work on black hole radiation highlights a critical issue in our understanding of quantum field theory in curved spacetime (QFTCS), specifically the problem of unitarity loss (where p...

#ReviewArticle K. Sravan Kumar & João Marto. Hawking radiation with pure states. #GenRelativGravit 56, 143 (2024). doi.org/10.1007/s107... #OpenAccess
Part of a collection based on presentation at the Spanish and Portuguese Relativity Meeting (EREP 2023).