Studies of pairing and condensates in nuclear and related systems

• Applicant: Privatdozent Dr. Armen Sedrakian
• Subject Area: Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
• Term: from 2017 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 390604839

• Final Report Year: 2020

Final Report Abstract

This project was focused on pairing properties of fermionic systems such as nuclear matter and ultracold atoms. The scattering amplitudes have been computed in the superfluid phases analytically using two alternative formulations of the Green’s functions technique and the numerical computations of the resulting equations are underway. We are currently exploring the possibility of symmetry braking phases of the superfluid fermions close to the unitary limit. After the discovery observation of the GW170817, some effort has been put on building models of compact stars with heavy baryons and possibly transition to quark matter that is compatible with the data obtained from this event. Most recent results from the NICER experiment have been incorporated in our work and it was shown that our current models, which include hyperonic and delta-resonance degrees of freedom are compatible with all astrophysical and nuclear laboratory constraints.

Publications

• Color superconductivity from the chiral quark-meson model. Phys. Lett. B 780, 627 (2018). [4 pages]
  A. Sedrakian, R. A. Tripolt and J. Wambach
  
• Toward electrodynamics of unconventional phases of dilute nuclear matter. J. Phys.: Conf. Ser. 1041 012008 (2018). [8 pages]
  A. Sedrakian and J. W. Clark
  
• Cooling of hypernuclear compact stars: Hartree-Fock models and high-density pairing. Monthly Notices Royal Astronomical Society 487, 2639 (2019). [13 pages]
  A. R. Raduta, J. J. Li, A. Sedrakian and F. Weber
  
• Superfluidity in nuclear systems and neutron stars. Eur. Phys. J. A 55 (2019) 167. [63 pages]
  A. Sedrakian and J. W. Clark