Publications (75)
LISA Definition Study Report
Monica Colpi, Karsten Danzmann, Martin Hewitson +108
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves…
Gravitational self-force from radiation-gauge metric perturbations
Adam Pound, Cesar Merlin, Leor Barack
Calculations of the gravitational self-force (GSF) in curved spacetime require as input the metric perturbation in a sufficiently regular gauge. A basic challenge in the program to…
Implementation of a GHZ-Teukolsky puncture scheme for gravitational self-force calculations
Patrick Bourg, Benjamin Leather, Marc Casals +2
Post-adiabatic models of extreme- and intermediate-mass-ratio inspirals will require calculations of second-order gravitational self-force effects in the spacetime of a spinning, K…
Black hole perturbation theory and gravitational self-force
Adam Pound, Barry Wardell
Much of the success of gravitational-wave astronomy rests on perturbation theory. Historically, perturbative analysis of gravitational-wave sources has largely focused on post-Newt…
Nonlinear gravitational self-force: second-order equation of motion
Adam Pound
When a small, uncharged, compact object is immersed in an external background spacetime, at zeroth order in its mass it moves as a test particle in the background. At linear order,…
The Bondi--Sachs gauge, BMS frames, and memory in black hole perturbation theory
Andrew Spiers, Adam Pound, Jordan Moxon
As LISA and other next-generation detectors demand increasingly accurate waveform models, there is a growing need for these models to precisely control gauge freedoms that had prev…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…
Motion of small bodies in general relativity: foundations and implementations of the self-force
Adam Pound
Extreme mass-ratio inspirals, in which solar-mass compact bodies spiral into supermassive black holes, are an important potential source for gravitational wave detectors. Because o…
Optical properties of the pseudogap state in underdoped cuprates
Adam Pound, J. P. Carbotte, E. J. Nicol
Recent optical measurements of deeply underdoped cuprates have revealed that a coherent Drude response persists well below the end of the superconducting dome. In addition, no larg…
Phonon structures in the electronic density of states of graphene in magnetic field
Adam Pound, J. P. Carbotte, E. J. Nicol
Unlike in ordinary metals, in graphene, phonon structure can be seen in the quasiparticle electronic density of states, because the latter varies on the scale of the phonon energy.…
Effective source for second-order self-force calculations: quasicircular orbits in Schwarzschild spacetime
Samuel D. Upton, Barry Wardell, Adam Pound +2
Recent years have seen the first production of "post-adiabatic" gravitational-waveform models based on second-order gravitational self-force theory. These models rely on calculatio…
Gravitational memory: new results from post-Newtonian and self-force theory
Kevin Cunningham, Chris Kavanagh, Adam Pound +3
We compute the (displacement) gravitational wave memory due to a quasicircular inspiral of two black holes using a variety of perturbative techniques. Within post-Newtonian theory,…
Hybrid waveform model for asymmetric spinning binaries: Self-force meets post-Newtonian theory
Loïc Honet, Adam Pound, Geoffrey Compère
We develop and implement a new hybrid waveform model for quasicircular inspirals with a spinning primary and nonspinning secondary, excluding the merger and ringdown. This model, w…
Motion of small objects in curved spacetimes: An introduction to gravitational self-force
Adam Pound
In recent years, asymptotic approximation schemes have been developed to describe the motion of a small compact object through a vacuum background to any order in perturbation theo…
Multi-domain spectral method for self-force calculations
Rodrigo Panosso Macedo, Patrick Bourg, Adam Pound +1
Second-order self-force calculations will be critical for modelling extreme-mass-ratio inspirals, and they are now known to have high accuracy even for binaries with mass ratios $\…
Adiabatic waveforms from extreme-mass-ratio inspirals: an analytical approach
Soichiro Isoyama, Ryuichi Fujita, Alvin J. K. Chua +3
Scientific analysis for the gravitational-wave detector LISA will require theoretical waveforms from extreme-mass-ratio inspirals (EMRIs) that extensively cover all possible orbita…
Second-order Teukolsky formalism in Kerr spacetime: formulation and nonlinear source
Andrew Spiers, Adam Pound, Jordan Moxon
To fully exploit the capabilities of next-generation gravitational wave detectors, we need to significantly improve the accuracy of our models of gravitational-wave-emitting system…
A conservative effect of the second-order gravitational self-force on quasicircular orbits in Schwarzschild spacetime
Adam Pound
A compact object moving on a quasicircular orbit about a Schwarzschild black hole gradually spirals inward due to the dissipative action of its gravitational self-force. But in add…
Second-order gravitational self-force in a highly regular gauge
Samuel D. Upton, Adam Pound
Extreme-mass-ratio inspirals (EMRIs) will be key sources for LISA. However, accurately extracting system parameters from a detected EMRI waveform will require self-force calculatio…
Effects of electron-phonon coupling on Landau levels in graphene
Adam Pound, J. P. Carbotte, E. J. Nicol
We calculate the density of states (DOS) in graphene for electrons coupled to a phonon in an external magnetic field. We find that coupling to an Einstein mode of frequency …
Singular perturbation techniques in the gravitational self-force problem
Adam Pound
Much of the progress in the gravitational self-force problem has involved the use of singular perturbation techniques. Yet the formalism underlying these techniques is not widely k…
Quadrupole and quadratic-in-spin effects in quasicircular, spinning, asymmetric binaries
Mostafizur Rahman, Misbah Shahzadi, Adam Pound +1
Next-generation gravitational-wave detectors will require significant improvements in current theoretical waveform models, particularly in the case of asymmetric-mass binaries. Her…
Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field model in 3+1 dimensions
Nikolas A. Wittek, Mekhi Dhesi, Leor Barack +10
Binary black hole simulations become increasingly more computationally expensive with smaller mass ratios, partly because of the longer evolution time, and partly because the lengt…
Comparing second-order gravitational self-force, numerical relativity and effective one body waveforms from inspiralling, quasi-circular and nonspinning black hole binaries
Angelica Albertini, Alessandro Nagar, Adam Pound +4
We present the first systematic comparison between gravitational waveforms emitted by inspiralling, quasi-circular and nonspinning black hole binaries computed with three different…
Waveform Modelling for the Laser Interferometer Space Antenna
LISA Consortium Waveform Working Group, Niayesh Afshordi, Sarp Akçay +144
LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will exp…
Quadratic quasi-normal mode dependence on linear mode parity
Patrick Bourg, Rodrigo Panosso Macedo, Andrew Spiers +3
Quasinormal modes (QNMs) uniquely describe the dominant piece of the gravitational-wave ringdown of postmerger black holes. While the linear QNM regime has been extensively studied…
Multi-scale analysis of the electromagnetic self-force in a weak gravitational field
Adam Pound, Eric Poisson
We examine the motion of a charged particle in a weak gravitational field. In addition to the Newtonian gravity exerted by a large central body, the particle is subjected to an ele…
Self-Force Calculations with a Spinning Secondary
Josh Mathews, Adam Pound, Barry Wardell
We compute the linear metric perturbation to a Schwarzschild black hole generated by a spinning compact object, specialising to circular equatorial orbits with an (anti-)aligned sp…
Gauge and motion in perturbation theory
Adam Pound
Through second order in perturbative general relativity, a small compact object in an external vacuum spacetime obeys a generalized equivalence principle: although it is accelerate…
The first law of binary black hole scattering
Riccardo Gonzo, Jack Lewis, Adam Pound
In the last decade, the first law of binary black hole mechanics played an important unifying role in the gravitational two-body problem. More recently, binary black hole scatterin…
Gravitational waveforms for compact binaries from second-order self-force theory
Barry Wardell, Adam Pound, Niels Warburton +3
We produce gravitational waveforms for nonspinning compact binaries undergoing a quasicircular inspiral. Our approach is based on a two-timescale expansion of the Einstein equation…
Second-order perturbation theory: the problem of infinite mode coupling
Jeremy Miller, Barry Wardell, Adam Pound
Second-order self-force computations, which will be essential in modeling extreme-mass-ratio inspirals, involve two major new difficulties that were not present at first order. One…
Spin-2 Green's Functions on Kerr in Radiation Gauge
Marc Casals, Stefan Hollands, Adam Pound +1
We construct retarded and advanced Green's functions for gravitational perturbations in Kerr in an ingoing radiation gauge. Our Green's functions have a frequency domain piece that…
Quadratic quasinormal modes at null infinity on a Schwarzschild spacetime
Patrick Bourg, Rodrigo Panosso Macedo, Andrew Spiers +3
The ringdown of perturbed black holes has been studied since the 1970s, but until recently, studies have focused on linear perturbations. There is now burgeoning interest in nonlin…
Comparing second-order gravitational self-force and effective one body waveforms from inspiralling, quasi-circular and nonspinning black hole binaries II: the large-mass-ratio case
Angelica Albertini, Alessandro Nagar, Adam Pound +4
We compare recently computed waveforms from second-order gravitational self-force (GSF) theory to those generated by a new, GSF-informed, effective one body (EOB) waveform model fo…
Second-order gravitational self-force
Adam Pound
Using a rigorous method of matched asymptotic expansions, I derive the equation of motion of a small, compact body in an external vacuum spacetime through second order in the body'…
Limitations of the adiabatic approximation to the gravitational self-force
Adam Pound, Eric Poisson, Bernhard G. Nickel
A small body moving in the field of a much larger black hole and subjected to its own gravity moves on an accelerated world line in the background spacetime of the large black hole…
Simple, efficient method of calculating the Detweiler-Whiting singular field to very high order
Patrick Bourg, Adam Pound, Samuel D. Upton +1
Most self-force calculations rely, in one way or another, on representations of a particle's Detweiler- Whiting singular field. We present a simple method of calculating the singul…
Comparison of 4.5PN and 2SF gravitational energy fluxes from quasicircular compact binaries
Niels Warburton, Barry Wardell, David Trestini +6
Recent years have seen significant advances in models of gravitational waveforms emitted by quasicircular compact binaries in two regimes: the weak-field, post-Newtonian regime, in…
Self-force framework for transition-to-plunge waveforms
Lorenzo Küchler, Geoffrey Compère, Leanne Durkan +1
Compact binaries with asymmetric mass ratios are key expected sources for next-generation gravitational wave detectors. Gravitational self-force theory has been successful in produ…
Completion of metric reconstruction for a particle orbiting a Kerr black hole
Cesar Merlin, Amos Ori, Leor Barack +2
Vacuum perturbations of the Kerr metric can be reconstructed from the corresponding perturbation in either of the two Weyl scalars or , using a procedure described by…
Deformed Schwarzschild horizons in second-order perturbation theory: mass, geometry, and teleology
Riccardo Bonetto, Adam Pound, Zeyd Sam
In recent years, gravitational-wave astronomy has motivated increasingly accurate perturbative studies of gravitational dynamics in compact binaries. This in turn has enabled more…
Worldtube excision method for intermediate-mass-ratio inspirals: scalar-field toy model
Mekhi Dhesi, Hannes R. Rüter, Adam Pound +2
The computational cost of inspiral and merger simulations for black-hole binaries increases in inverse proportion to the square of the mass ratio . One factor of…
The motion of point particles in curved spacetime
Eric Poisson, Adam Pound, Ian Vega
This review is concerned with the motion of a point scalar charge, a point electric charge, and a point mass in a specified background spacetime. In each of the three cases the par…
Relieving scale disparity in binary black hole simulations
Nikolas A. Wittek, Leor Barack, Harald P. Pfeiffer +7
Worldtube excision is a method of reducing computational burden in Numerical Relativity simulations of binary black holes in situations where there is a good analytical model of th…
Self-force framework for merger-ringdown waveforms
Lorenzo Küchler, Geoffrey Compère, Adam Pound
The prospect of observing asymmetric compact binaries with next-generation gravitational-wave detectors has motivated the development of fast and accurate waveform models in gravit…
Post-adiabatic waveform-generation framework for asymmetric precessing binaries
Josh Mathews, Adam Pound
Recent years have seen rapid progress in calculations of gravitational waveforms from asymmetric compact binaries containing spinning secondaries. Here we outline a complete wavefo…
The self-consistent gravitational self-force
Adam Pound
I review the problem of motion for small bodies in General Relativity, with an emphasis on developing a self-consistent treatment of the gravitational self-force. An analysis of th…
Post-Minkowskian self-force in the low-velocity limit: scalar field scattering
Donato Bini, Andrea Geralico, Chris Kavanagh +2
In this paper we present an approach to compute analytical post-Minkowskian corrections to unbound two-body scattering in the self-force formalism. Our method relies on a further l…
Second-order self-force calculation of the gravitational binding energy in compact binaries
Adam Pound, Barry Wardell, Niels Warburton +1
Self-force theory is the leading method of modeling extreme-mass-ratio inspirals (EMRIs), key sources for the gravitational-wave detector LISA. It is well known that for an accurat…
Research Update on Extreme-Mass-Ratio Inspirals
Pau Amaro-Seoane, Jonathan R. Gair, Adam Pound +2
The inspirals of stellar-mass mass compact objects into massive black holes in the centres of galaxies are one of the most important sources of gravitational radiation for space-ba…
Gravitational-wave energy flux for compact binaries through second order in the mass ratio
Niels Warburton, Adam Pound, Barry Wardell +2
Within the framework of self-force theory, we compute the gravitational-wave energy flux through second order in the mass ratio for compact binaries in quasicircular orbits. Our re…
Second-order perturbation theory: problems on large scales
Adam Pound
In general-relativistic perturbation theory, a point mass accelerates away from geodesic motion due to its gravitational self-force. Because the self-force is small, one can often…
Post-adiabatic dynamics and waveform generation in self-force theory: an invariant pseudo-Hamiltonian framework
Jack Lewis, Takafumi Kakehi, Adam Pound +1
Gravitational waveform modeling in self-force theory has reached a mature stage in recent years, with fast and accurate models emerging at both adiabatic (0PA) and first post-adiab…
Two-timescale evolution of extreme-mass-ratio inspirals: waveform generation scheme for quasicircular orbits in Schwarzschild spacetime
Jeremy Miller, Adam Pound
Extreme-mass-ratio inspirals, in which a stellar-mass compact object spirals into a supermassive black hole in a galactic core, are expected to be key sources for LISA. Modelling t…
A practical, covariant puncture for second-order self-force calculations
Adam Pound, Jeremy Miller
Accurately modeling an extreme-mass-ratio inspiral requires knowledge of the second-order gravitational self-force on the inspiraling small object. Recently, numerical puncture sch…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Self-force and radiation reaction in general relativity
Leor Barack, Adam Pound
[Abridged] This review surveys the theory of gravitational self-force in curved spacetime and its application to the gravitational two-body problem in the extreme-mass-ratio regime…
Worldtube excision method for intermediate-mass-ratio inspirals: self-consistent evolution in a scalar-charge model
Nikolas A. Wittek, Adam Pound, Harald P. Pfeiffer +1
This is a third installment in a program to develop a method for alleviating the scale disparity in binary black hole simulations with mass ratios in the intermediate astrophysical…
Black hole mergers beyond general relativity: a self-force approach
Ayush Roy, Lorenzo Küchler, Adam Pound +1
Gravitational waves from binary black hole mergers provide a glimpse of gravitational dynamics in its most extreme observable regime, potentially enabling precision tests of genera…
Enhancing the SEOBNRv5 effective-one-body waveform model with second-order gravitational self-force fluxes
Maarten van de Meent, Alessandra Buonanno, Deyan P. Mihaylov +7
The paper incorporates second‑order gravitational self‑force calculations into the SEOBNRv5 effective‑one‑body waveform model, improving its mode amplitudes, energy flux, and bindi…
Worldtube puncture scheme for first- and second-order self-force calculations in the Fourier domain
Jeremy Miller, Benjamin Leather, Adam Pound +1
Second-order gravitational self-force theory has recently led to the breakthrough calculation of ``first post-adiabatic'' (1PA) compact-binary waveforms [Phys. Rev. Lett. 130, 2414…
Second-order perturbations of the Schwarzschild spacetime: practical, covariant and gauge-invariant formalisms
Andrew Spiers, Adam Pound, Barry Wardell
High-accuracy gravitational-wave modeling demands going beyond linear, first-order perturbation theory. Particularly motivated by the need for second-order perturbative models of e…
New metric reconstruction scheme for gravitational self-force calculations
Vahid Toomani, Peter Zimmerman, Andrew Spiers +3
Inspirals of stellar-mass objects into massive black holes will be important sources for the space-based gravitational-wave detector LISA. Modelling these systems requires calculat…
Constants of motion in gravitational self-force theory
David Trestini, Zachary Nasipak, Adam Pound
Synergies between self-force theory and other approaches to the gravitational two-body problem have traditionally relied on calculations of gauge-invariant observables as functions…
Osculating orbits in Schwarzschild spacetime, with an application to extreme mass-ratio inspirals
Adam Pound, Eric Poisson
We present a method to integrate the equations of motion that govern bound, accelerated orbits in Schwarzschild spacetime. At each instant the true worldline is assumed to lie tang…
LISA science ground segment conventions
Quentin Baghi, Stanislas Babak, Leor Barack +22
This document sets out the conventions used for data simulations, waveforms, and analysis pipelines within the Distributed Data Processing Centre (DDPC) of the Laser Interferometer…
Transition-to-plunge self-force waveforms with a spinning primary
Loïc Honet, Lorenzo Küchler, Adam Pound +1
With the upcoming third-generation gravitational-wave detectors comes the need to build complete, faithful, and fast waveform models for asymmetric-mass-ratio compact binaries. Mos…
Nonlinear gravitational self-force. I. Field outside a small body
Adam Pound
A small extended body moving through an external spacetime creates a metric perturbation , which forces the body away from geodesic motion in . The f…
Post-adiabatic self-force waveforms: slowly spinning primary and precessing secondary
Josh Mathews, Barry Wardell, Adam Pound +1
Recent progress in gravitational self-force theory has led to the development of a first post-adiabatic (1PA) waveform model for nonspinning, quasicircular compact binaries [Phys.…
Linear-in-mass-ratio contribution to spin precession and tidal invariants in Schwarzschild spacetime at very high post-Newtonian order
Abhay G. Shah, Adam Pound
Using black hole perturbation theory and arbitrary-precision computer algebra, we obtain the post-Newtonian (pN) expansions of the linear-in-mass-ratio corrections to the spin-prec…
Spin-aligned inspiral waveforms from self-force and post-Newtonian theory
Loïc Honet, Josh Mathews, Geoffrey Compère +5
We present the state-of-the-art waveform model WaSABI-C for quasicircular inspirals of spinning black hole binaries with aligned or anti-aligned spins. Our model synthesizes the mo…
Accuracy Requirements: Assessing the Importance of First Post-Adiabatic Terms for Small-Mass-Ratio Binaries
Ollie Burke, Gabriel Andres Piovano, Niels Warburton +7
We investigate the impact of post-adiabatic (1PA) terms on parameter estimation for extreme and intermediate mass-ratio inspirals using state-of-the-art waveform models. Our analys…
Magneto-optical conductivity in graphene including electron-phonon coupling
Adam Pound, J. P. Carbotte, E. J. Nicol
We show how coupling to an Einstein phonon affects the absorption peaks seen in the optical conductivity of graphene under a magnetic field . The energies and widths of t…
Second-order gravitational self-force -- a quick summary
Adam Pound
In order to extract physical parameters from the waveform of an extreme-mass-ratio binary, one requires a second-order--accurate description of the motion of the smaller of the two…