DK

Deepak Kumar

Indian Institute of Science Education and Research Berhampur, Indian Institute of Science Education and Research, Bhopal, Physical Research Laboratory, Banaras Hindu University Faculty of Science

ORCID iD 0000-0001-9292-3598
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About

I am a theoretical physicist working at the interface of neutron-star physics. I am a post-doctoral fellow at IISER Berhampur, India. My research combines {\bf relativistic mean-field theory (DDB, RMF-NL)} for nuclear matter with quark-matter descriptions based on the {\bf Nambu–Jona-Lasinio (NJL) and MIT bag} models to construct realistic equations of state (EOS) of strongly interacting matter in neutron stars (NSs), hybrid stars. I focus on NSs and NS asteroseismology incorporating constraints from gravitational-wave observations and NICER data. I have strong expertise in {\bf high-performance computing and, Bayesian and machine-learning analysis}. {\em I develop all numerical codes used in my research independently from the scratch.}

A core component of my research is the {\bf development and constraint of dense-matter EOS consistent with astrophysical observations}. I have contributed to {\bf Bayesian and phenomenological approaches} to constrain the neutron-star EOS; including the role of isoscalar and isovector couplings \cite{Kumar:2026tqe, Kumar:2026p4_60}, the interpretation of compact objects such as HESS~J1731--347 \cite{Tewari:2024qit} and limits on the maximum neutron-star mass from {\bf proto-neutron-star evolution} \cite{Kumar:2025dlc}.

I have demonstrated how non-radial oscillation modes are modified by mixed phases and deconfined quark matter in {\bf hybrid stars} \cite{Kumar:2021hzo}, established robust universal relations in {\bf neutron-star asteroseismology} \cite{Kumar:2023rut} and quantified how proto-neutron-star effects alter mass--radius--mode-frequency relations \cite{Kumar:2024bvd}. More recently, I have employed {\bf machine-learning techniques} to connect nuclear saturation properties to $f$-mode frequencies \cite{Kumar:2024fui}. These results provide a direct methodological and conceptual basis for the internal composition and asteroseismic observables.

I have also investigated the role of novel degrees of freedom in dense matter, including CP violation and axion effects in cold dense quark matter and their impact on neutron-star non-radial oscillations \cite{Kumar:2024abb}. This work strengthens my expertise in connecting beyond-standard-model physics and QCD-motivated microphysics to macroscopic neutron-star observables, a key ingredient when assessing phase transition.

My earlier research on {\bf transport properties of quark matter} \cite{Abhishek:2020wjm} and {\bf chiral dynamics in effective QCD models} \cite{Das:2019crc} provides the microphysical foundation for understanding viscosity, dissipation and mode damping, which are essential for evaluating the nature of dense matter inside the core of neutron/hybrid star. I actively disseminate this research through conference proceedings and invited contributions \cite{Kumar:2024lfo}, demonstrating engagement with the broader neutron-star and dense-matter communities.

In addition to my research, I have been actively engaged in {\bf teaching assistance} (like in taking tutorial classes, exam duties). I have assisted one Master and one PhD students, guiding them on research projects related to application of {\bf Bayesian analysis in neutron-star physics, dense matter, and computational modeling}, and supporting them in developing independent research skills, scientific writing \cite{Tewari:2024qit, Kumar:2024bvd}. I have also been participated in outreach and academic engagement activities on the national science day to broader audiences. Along with the conference seminars (plenary as well as parallel), I have given an invited talk as well. Through these activities, I value collegiality, inclusivity and the creation of a supportive learning environment.

Overall, my research trajectory establishes a coherent and independent program that connects dense-matter microphysics, neutron-star structure, oscillations, and NS observables.

Employment

  • Indian Institute of Science Education and Research Berhampur Postdoctoral Research Fellow
    2026 - Present

Education

  • Indian Institute of Science Education and Research, Bhopal Research Associate
    2023 - Present
  • Physical Research Laboratory PhD
    2017 - Present
  • Banaras Hindu University Faculty of Science M.Sc.
    2014 - 2016
  • Banaras Hindu University Faculty of Science B.Sc.
    2011 - 2014

Projects & Funding

Projects & funding information is unavailable.

Publications (21)