Gabriele Bozzola's homepage on Gabriele Bozzola

Mon, 01 Jan 0001 00:00:00 +0000

I always enjoy talking about software and science. Get in touch with me (address in the homepage) if you would like to invite me for a talk.

Research software engineering

Emacs

kuibit / Einstein Toolkit

Tutorial: Post-processing Cactus simulations with Python

More about me

Mon, 01 Jan 0001 00:00:00 +0000

More about me

Life is not all about numerical simulations and data analysis. In this page, I collect some additional information about me that will help you understand better who I am.

I am a fan of…

(in no particular order)

National Parks

I have the luck to live in a place that offers endless opportunities to enjoy the outdoors, so my favorite weekend activities are hiking and cycling. When I have a little bit more time, I love exploring the stunning National Parks and Forests that are in Arizona and in the South West.

Publications

Mon, 01 Jan 0001 00:00:00 +0000

Peer-reviewed publications

In chronological order (first is most recent).

M.\ Smith, V.\ Paschalidis, G. Bozzola, High-energy interactions of charged black holes in full general relativity. II. Near-extremal merger remnants and universality with the irreducible mass. 2025, PRD 111, 104302 (arxiv)
M.\ Smith, V.\ Paschalidis, G. Bozzola, High-energy interactions of charged black holes in full general relativity. I. Zoom-whirl orbits and universality with the irreducible mass. 2025, PRD 111, 104031 (arxiv)
V. Manikantan, V.\ Paschalidis, G. Bozzola, Coincident Multimessenger Bursts from Eccentric Supermassive Binary Black Holes. 2025, APJL 984, L47 (arxiv)
M. Naseri, G. Bozzola, V. Paschalidis. Exploring pathways to forming twin stars. 2024, PRD 110, 4, 44037084004 (arxiv)
G. Bozzola, C. Chan, V. Paschalidis. Not all spacetime coordinates for general-relativistic ray tracing are created equal. 2023, PRD 108, 8, 084004 (arxiv)
G. Bozzola, V. Paschalidis. Can quasi-circular mergers of charged black holes produce extremal black holes?. 2023, PRD 107, 104059 (arxiv)
P. Espino, G. Bozzola, V.\ Paschalidis, 2023, PRD 107, 104059 (arxiv)
R. Luna, G. Bozzola, V. Cardoso, V. Paschalidis, M. Zilhão. _Kicks in charged black hole binaries. 2022, PRD 106, 8, 084017 (arxiv)
G. Bozzola, C. Chan, V. Paschalidis. Black Hole Physics and Computer Graphics. 2022, CISE 24, 2
G. Bozzola. Does charge matter in high-energy collisions of black holes?. 2022, PRL 128, 071101 (arXiv)
G. Bozzola, V. Paschalidis. Numerical-relativity simulations of the quasi-circular inspiral and merger of non-spinning, charged black holes: methods and comparison with approximate approaches. 2021, PRD 104, 4, 044004 (arXiv)
G. Bozzola. kuibit: Analyzing Einstein Toolkit simulations with Python. 2021, JOSS 60(6), 3099 (arXiv)
G. Bozzola, V. Paschalidis. General relativistic simulations of the quasi-circular inspiral and merger of charged black holes: GW150914 and fundamental physics implications. 2021, PRL. 126, 041103 (arXiv)
G. Bozzola, P. Espino, C. Lewin, V. Paschalidis. Maximum mass, solution space and universal relations of rotating relativistic hadron-quark hybrid stars. 2019, EPJA A 55 9, 149 (arXiv)
G. Bozzola, V. Paschalidis. Initial data for general relativistic simulations of multiple electrically charged black holes with linear and angular momenta. 2019, PRD 99, 10, 104044 (arXiv)
G. Bozzola, N. Stergioulas, A. Bauswein. Universal relations for differentially rotating relativistic stars at the threshold to collapse. 2018, MNRAS 474, 3557–3564 (arXiv)

Research

Mon, 01 Jan 0001 00:00:00 +0000

The intended audience of this page are specialists (i.e., physicists, astronomers, …). You can find the version for the general public here.

Numerical relativity and gravitational wave astronomy

Broadly speaking, my research focuses on strongly gravitating systems, such as black holes and neutron stars. I develop and use computational methods and codes to tackle problems in strong gravity and I primarily work in numerical relativity, field that is concerned with finding numerical solutions to the equations of general relativity. I am deeply interested in using simulations to push our physical theories to their limits and learn more about fundamental physics. One of the main ways I am doing this is by using gravitational waves to interface with observations and experiments. Gravitational waves (detected for the first time in 2015) offer a completely new way to study the universe and are providing invaluable data to address long standing questions.

Research

Mon, 01 Jan 0001 00:00:00 +0000

The intended audience of this page is the general public. You can find the version for specialists here.

Numerical relativity

General relativity is one of the most famous and well-established physical theories. The first formulation is due to Albert Einstein and it is more than 100 years old. Despite the age, it was only with the advent of computers that scientists managed to unlock some of the most ground-braking predictions of the theory, such as detailed models for gravitational waves. Putting general relativity on a computer was no easy task and an entire new branch of physics was born in the effort. I specialize in this field, known as numerical relativity. Today, we can perform successful numerical-relativity simulations of several different systems and build models that guide and explain astronomical observations. In my research, I apply numerical-relativity techniques to study binary systems, and I extend our computational and theoretical methods for numerical relativity in general.

Resume

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INTERESTS

High-performance computing, (research) software engineering, open source software, open science, community and inclusion.

WORK EXPERIENCE

Applied Scientist, Center for Quantum Computing, Amazon, San Francisco (CA). Jun 2025 –
Senior Software Engineer at CliMA, California Institute of Technology, Pasadena (CA). Nov 2024 – Jun 2025
Software Engineer at CliMA, California Institute of Technology, Pasadena (CA). Aug 2023 – Nov 2024
Research and Teaching Assistant at University of Arizona, Tucson (AZ). Jan 2018 – Aug 2023

Software

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Scientific codes

CliMA packages

I develop and contribute to several packages at CliMA (in particular, I designed and authored ClimaAnalysis, ClimaUtilities, ClimaDiagnostics). While I do a little bit of everything (performance, user interface, physics, reliability, …), one of my main areas of focus is data in its entire life cycle, from ingestion to post-processing and visualization.

kuibit

kuibit is a large Python library to analyze simulations performed with the Einstein Toolkit. The package takes care of all the low-level details and removes most of the friction in studying simulation outputs.