164 citations · 2.2k across the 66 of their papers we have counts for
5 papers · 1 filter
Cosmic Simulations of Axion String-Wall Networks: Probing Dark Matter and Gravitational Waves for Discovery
Yang Li, Ligong Bian, Rong-Gen Cai +1
We simultaneously study gravitational waves (GWs) and free axions emitted from axionic string-wall networks in the early universe using advanced 3D lattice simulations. Our simulat…
Heavy QCD axion model in light of pulsar timing arrays
Moslem Ahmadvand, Ligong Bian, Soroush Shakeri
Recently, pulsar timing array experiments reported the observation of a stochastic gravitational wave background in the nanohertz range frequency band. We show that such a signal c…
Gravitational wave sources for Pulsar Timing Arrays
Ligong Bian, Shuailiang Ge, Jing Shu +3
Very recently, several pulsar timing array collaborations, including CPTA, EPTA, and NANOGrav, reported their results from searches for an isotropic stochastic gravitational wave b…
Solving the domain wall problem with first-order phase transition
Yang Li, Ligong Bian, Yongtao Jia
Domain wall networks are two-dimensional topological defects generally predicted in many beyond standard model physics. In this Letter, we propose to solve the domain wall problem…
Constraints on new physics around the MeV scale with cosmological observations
Shihao Deng, Ligong Bian
We investigate the joint effect of the cosmological phase transitions, thermal light dark matter, and the lepton asymmetry on the big bang nucleosynthesis and cosmic microwave back…