4 papers
Can a Slow and Strong Phase Transition in Neutron Stars Relieve Major Compact-Star Observation Tensions?
Chen Zhang
Recent anomalous compact-star observations challenge the conventional neutron-star interpretation in complementary ways: HESS J1731--347 and XTE J1814--338 favor unusually small ra…
Nonconforming Finite Element Approximation and Energy Lower Bound Estimation for the Gross--Pitaevskii Energy Functional
Chen Zhang, Heyan Zhu, Wenbin Chen
The ground state of Bose--Einstein condensates can be described as the minimizer of the Gross--Pitaevskii energy functional subject to a mass conservation constraint. In this paper…
Self-bound hybrid stars with strong phase transitions can relieve major compact star observation tensions
Chen Zhang, Juan M. Z. Pretel, Renxin Xu
Some recent pulsar observations cannot naturally fit into the conventional picture of neutron stars: the compact objects associated with HESS J1731-347 and XTE J1814-338 have too s…
Universal relations for anisotropic interacting quark stars
Juan M. Z. Pretel, Chen Zhang
Interacting quark stars, which are entirely composed of interacting quark matter including perturbative QCD corrections and color superconductivity, can meet constraints from vario…