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Offer Description
The postdoctoral researcher will be part of the nuclear theory team at IJCLab, Orsay. He/she will work on the ab-initio description of asymmetric nuclear matter as it exists in neutron-star cores.
The core of neutron stars is thought to consist of homogeneous matter containing neutrons, protons, electrons, and possibly muons. Other degrees of freedom such as hyperons or quarks may play a role in the more central regions of the core where the density is even higher, but the present project will concentrate on purely nucleonic matter. This matter has densities between half and several times nuclear saturation density and is extremely neutron rich, and these conditions cannot be studied in terrestrial experiments. Hence, phenomenological energy density functionals have large uncertainties. The aim of this project is therefore to use an ab-initio approach, i.e., to start from realistic nucleon-nucleon interactions. More precisely, the idea is to extend recent [V. Palaniappan et al., arxiv:2211.01308] and on-going studies on the description of pure neutron matter to higher densities and to the case that also protons are present, which requires to include the three-body force. Besides the equation of state, also the superfluid properties will be studied, which in this regime are probably due to pairing in the triplet channel.
The postdoctoral fellow will participate in the formal developments of the theory and in the numerical implementations. The proposed way to attack the problem is to first soften the nuclear interactions by solving the similarity renormalization group (SRG) flow equation for the two- and three-body forces and subsequently use them in the framework of many-body perturbation theory (MBPT). The postdoc will also participate in the writing of publications and present his/her results at conferences and workshops.
The Irène Joliot-Curie Laboratory for the Physics of 2 Infinities (IJCLab) is a joint research unit under the auspices of the CNRS, the University of Paris-Saclay and the University of Paris. It comprises around 650 researchers, engineers and technicians and is located on the campus of the University of Paris-Saclay.
Its research themes are nuclear physics, high-energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy, the environment and health.
The Researcher will work in the Theoretical Nuclear Physics group (around 16 physicists, including PhD students), which is part of the Theoretical Physics department.
The position is in a sector covered by the protection of scientific and technological potential (PPST), and therefore requires, in accordance with the regulations, that your arrival be authorised by the competent authority of the MESR.
IJCLAB bases its recruitment policy on the promotion of equality, diversity and inclusion. These values are essential to the professional development of our staff, who are key players in our collective success, and to the development of the laboratory itself.
Requirements
Additional Information
Eligibility criteria
-The candidate should have a PhD thesis in theoretical physics in the field of nuclear or neutron-star physics, and he/she needs solid skills in many-body theory, mathematics, and numerical programming. Ideally he/she is already familiar with some of the concepts mentioned in the section ‘Activities’ above. The candidate should be able to work in a small team (3-4 persons). Fluent oral communication and good writing skills in English are necessary, knowledge of French is useful for daily life in France but not necessary to carry out the work.
Additional comments
Applications should contain a cover letter and résumé showing diplomas, work experience, list of publications and conference contributions, and mentioning names and e-mail addresses of two references (e.g., PhD advisor and former supervisors) who accept to be contacted for recommendation letters. Please notice that IJCLab is in a restricted access zone (ZRR) and a CV without any break in dates will be needed to obtain the access authorization.
The closing date for applications is June 15, 2024.
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