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I am interested in compressed baryonic matter, such as pulsars especially, in astrophysics. Baryonic nuclei in the daily life are forbidden to fuse by compression due to the Coulomb repulse; nevertheless, it is usually unexpected in extraterrestrial extreme-environments: the gravity in a core of massive evolved star is so strong that all the other forces (including the Coulomb one) could be negligible. Compressed baryonic matter is then produced after supernova, manifesting itself as pulsar-like compact stars observed. The study of this compressed baryonic matter can not only be meaningful in fundamental physics (e.g., the elementary color interaction at low-energy scale, testing gravity theories, detecting nano-Hertz background gravitational waves), but has also profound implications in engineering applications (including time standard and navigation), and additionally, is focused by international as well as Chinese advanced facilities, either terrestrial or in space.
Historically, in 1930s, Lev Landau speculated that dense matter at supra-nuclear density in stellar cores could be considered as gigantic nuclei (the prototype of standard model of neutron star). However, we address that the residual compact object of supernova could be of condensed matter of quark clusters. We are both developing the quark-cluster star model and expecting to test it by observations.
I am involved in the FAST early science research financially supported by National Basic Research Program of China, focusing on pulsar physics and observation.