Modular Unified Solver of the Equation of State

NSF // CSSI Framework


MUSES is an NSF-funded large collaboration project that is developing a new cyberinfrastructure to provide the scientific community novel tools to answer critical interdisciplinary questions in nuclear physics, gravitational wave astrophysics, and heavy-ion physics.


Updated & Integrated

Many of the existing calculation packages have a long and storied history, with unmaintainable code written in programming languages that have fallen from favor. Much of the initial work of MUSES is converting, rewriting, and upgrading these scripts to form the first code modules to be integrated into calculation packages that together will form the core Calculation Engine. Most of the code will be rewritten as high-performance C++ libraries that can be wrapped for use in other languages such as Python as desired.

Cloud-native & Scalable

The MUSES cyberinfrastructure is more than the Calculation Engine. We are building a cloud native deployment system based on the latest container technologies, leveraging the power of Kubernetes to create a reproducible environment compatible with a wide range of hosting platforms. Individuals and organizations can deploy their own MUSES on-premises, utilizing their own backend computing solutions and maintaining full control over their data.


The MUSES collaboration consists of many researchers and technical professionals across dozens of institutions spread across the globe. We are building and using a collaborative platform designed for the demands of inclusive and vibrant scientific communities.

Community Forum

Engage and connect with the MUSES collaboration and growing open source community on our Discourse forum.


Collaboration cloud storage

A dedicated Nextcloud server provides a wealth of collaborative tools, including cloud file storage, group calendars, and many more via installable Nextcloud apps.

(Collaborators only)

Community chat and teleconferencing

Matrix is the frontier of free, open source, and decentralized communications. We host the MUSES space on Matrix and rooms created for general discussion, support, and outreach, while providing a federated way for the general public to connect with the project.


Users can launch dedicated JupyterLab servers, providing a powerful platform to process data using the high-performance computers at NCSA. A custom Universal Worker Service API server provides asynchronous parallel processing via Kubernetes Jobs, with support for NCSA Delta coming soon.

(Collaborators only)

Collaborative documents

Real-time, collaborative document editing is a valuable tool for brainstorming, drafting publications, and more. Our HedgeDoc-powered service brings this productivity to the collaboration, with the convenience of optional public document editing.

(Collaborators only)

Organization & Leadership

The MUSES collaboration leadership structure is found on the MUSES Organization website hosted by the University of Illinois Physics department.


Nicolas Yunes

Principal Investigator

Jaki Noronha-Hostler


Claudia Ratti


Veronica Dexheimer


Jorge Noronha


T. Andrew Manning

Senior Investigator at NCSA

Recent News

Finite density QCD equation of state: critical point and lattice-based T′-expansion

Date: February 13, 2024

Title: Finite density QCD equation of state: critical point and lattice-based T′-expansion

Authors: Micheal Kahangirwe, Steffen A. Bass, Elena Bratkovskaya, Johannes Jahan, Pierre Moreau, Paolo Parotto, Damien Price, Claudia Ratti, Olga Soloveva, Mikhail Stephanov

Abstract: We present a novel construction of the QCD equation of state (EoS) at finite baryon density. Our work combines a recently proposed resummation scheme for lattice QCD results with the universal critical behavior at the QCD critical point. This allows us to obtain a family of equations of state in the range 0≤μB≤700 MeV and 25≤T≤800 MeV, which match lattice QCD results near μB=0 while featuring a critical point in the 3D Ising model universality class…

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Thermodynamics of an updated hadronic resonance list and influence on hadronic transport

Date: Sep 04, 2023
Title: Thermodynamics of an updated hadronic resonance list and influence on hadronic transport
Authors: Jordi Salinas San Martín, Renan Hirayama, Jan Hammelmann, Jamie M. Karthein, Paolo Parotto, Jacquelyn Noronha-Hostler, Claudia Ratti, Hannah Elfner
Abstract: Hadron lists based on experimental studies summarized by the Particle Data Group (PDG) are a crucial input for the equation of state and thermal models used in the study of strongly-interacting matter produced in heavy-ion collisions. Modeling of these strongly-interacting systems is carried out via hydrodynamical simulations, which are followed by hadronic transport codes that also require a hadronic list as input. To remain consistent throughout the different stages of modeling of a heavy-ion collision, the same hadron list with its corresponding decays must be used at each step. It has been shown that even the most uncertain states listed in the PDG from 2016 are required to reproduce partial pressures and susceptibilities from Lattice Quantum Chromodynamics with the hadronic list known as the PDG2016+. Here, we update the hadronic list for use in heavy-ion collision modeling by including the latest experimental information for all states listed in the Particle Data Booklet in 2021. We then compare our new list, called PDG2021+, to Lattice Quantum Chromodynamics results and find that it achieves even better agreement with the first principles calculations than the PDG2016+ list. Furthermore, we develop a novel scheme based on intermediate decay channels that allows for only binary decays, such that PDG2021+ will be compatible with the hadronic transport framework SMASH. Finally, we use these results to make comparisons to experimental data and discuss the impact on particle yields and spectra.

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Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter

Date: March 29, 2023
Title: Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
Authors: Rajesh Kumar, Veronica Dexheimer, Johannes Jahan, Jorge Noronha, Jacquelyn Noronha-Hostler, Claudia Ratti, Nico Yunes, Angel Rodrigo Nava Acuna, Mark Alford, Mahmudul Hasan Anik, Katerina Chatziioannou, Hsin-Yu Chen, Alexander Clevinger, Carlos Conde, Nikolas Cruz Camacho, Travis Dore, Christian Drischler, Hannah Elfner, Reed Essick, David Friedenberg, Suprovo Ghosh, Joaquin Grefa, Roland Haas, Jan Hammelmann, Steven Harris, Carl-Johan Haster, Tetsuo Hatsuda, Mauricio Hippert, Renan Hirayama, Jeremy W. Holt, Micheal Kahangirwe, Jamie Karthein, Toru Kojo, Philippe Landry, Zidu Lin, Matthew Luzum, T. Andrew Manning, Jordi Salinas San Martin, Cole Miller, Elias Roland Most, Debora Mroczek, Azwinndini Muronga, Nicolas Patino, Jeffrey Peterson, Christopher Plumberg, Damien Price, Constanca Providencia, Romulo Rougemont, Satyajit Roy, Hitansh Shah, Stuart Shapiro, Andrew W. Steiner, Michael Strickland, Hung Tan, Hajime Togashi, Israel Portillo Vazquez, Pengsheng Wen, Ziyuan Zhang (MUSES Collaboration)
Abstract: This review aims at providing an extensive discussion of modern constraints relevant for dense and hot strongly interacting matter. It includes theoretical first-principle results from lattice and perturbative QCD, as well as chiral effective field theory results. From the experimental side, it includes heavy-ion collision and low-energy nuclear physics results, as well as observations from neutron stars and their mergers. The validity of different constraints, concerning specific conditions and ranges of applicability, is also provided.

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