This PhD opportunity at the University of Southampton focuses on the study of dense matter in the Quantum Chromodynamics (QCD) phase diagram, particularly as it relates to the interiors of compact stars such as neutron stars. QCD is the fundamental theory describing the strong nuclear force, and understanding its behavior under extreme conditions is a major challenge in modern theoretical physics. The project aims to investigate the properties, phases, and transitions of matter at high densities and pressures, contributing to our knowledge of both fundamental particle interactions and astrophysical phenomena. Research will be conducted within the Faculty of Social Sciences, leveraging expertise in nuclear physics, particle physics, and theoretical physics. The successful candidate will explore topics such as the QCD phase diagram, the nature of dense nuclear matter, and the implications for the structure and evolution of compact stars. This work is highly interdisciplinary, bridging high-energy physics and astrophysics, and may involve mathematical modeling, quantum field theory, and computational approaches. Applicants should have a strong academic background in physics or a closely related field, with particular strengths in theoretical and nuclear physics. Experience with mathematical modeling and quantum field theory is advantageous. The position is supervised by Prof A Schmitt, an expert in the field, and offers the opportunity to contribute to cutting-edge research in fundamental physics and astrophysics. Funding details are not specified in the current announcement. Interested candidates should prepare a CV, academic transcripts, and a statement of research interests, and apply via the University of Southampton's application portal before the deadline of 16 February 2026. For further information or informal inquiries, candidates may contact the supervisor directly.

This PhD position at the University of Southampton focuses on the study of dense matter in the Quantum Chromodynamics (QCD) phase diagram, particularly as it relates to the interiors of compact stars such as neutron stars. QCD is the fundamental theory describing the strong nuclear force, and understanding its phases under extreme conditions is a major challenge in modern theoretical physics. The project will investigate the properties and phase transitions of matter at high densities, contributing to ongoing research in nuclear and particle physics, as well as astrophysics. Hosted within the School of Mathematics, this research opportunity is ideal for students with a strong background in theoretical physics, nuclear physics, or particle physics. The work will involve mathematical modeling and theoretical analysis, aiming to shed light on the behavior of matter in environments far beyond those accessible in terrestrial laboratories. The project is supervised by Prof A Schmitt, an expert in the field, and offers the chance to engage with cutting-edge research at the intersection of high energy physics and astrophysics. Applicants should possess or expect to obtain a first or upper second class degree in Physics, Mathematics, or a closely related discipline. Experience in theoretical physics and an interest in quantum chromodynamics and compact stars are highly desirable. English language proficiency is required for non-native speakers. The application deadline is 16 February 2026. For more information and to apply, please visit the project page. This position does not currently specify funding availability, so candidates are encouraged to check the university website or contact the supervisor for updates regarding financial support.