2 papers
astro-ph.CO2025
Reconciling cosmic dipolar tensions with a gigaparsec void
Tingqi Cai, Qianhang Ding, Yi Wang
Recent observations indicate a tension between the CMB and quasar dipoles. This tension challenges the cosmological principle. We propose that if we live in a gigaparsec sc…
gr-qc2024
A Topological Drive for Spacetime Travel
Tingqi Cai, Yi Wang
We present a toy metric of spacetime travel from topological change. A bubble-like baby universe is detached and re-attached from our universe. Depending on where the bubble is re-…