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astro-ph.HE2026
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…
math.NA2026
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…