The Prospects of Finding Tidal Disruption Events with 2.5-Metre
  Wide-Field Survey Telescope (WFST) Based on Mock Observations
  Optical time-domain survey has been the dominant means of hunting for rare
tidal disruption events (TDEs) in the past decade and remarkably advanced the
TDE study. Particularly, the Zwicky Transient Facility (ZTF) has opened the era
of population studies and the upcoming Large Synoptic Survey Telescope (LSST)
at the Vera Rubin Observatory (VRO) is believed to further revolutionize the
field soon. Here we present the prospects of finding TDEs with another powerful
survey to be performed by 2.5-metre Wide-Field Survey Telescope (WFST). The
WFST, located in western China, will be the most advanced facility dedicated to
optical time-domain surveys in the northern hemisphere once commissioning. We
choose to assess its TDE detectability on the basis of mock observations, which
is hitherto closest to reality by taking into consideration of site conditions,
telescope parameters, survey strategy and transient searching pipeline. Our
mock observations on 440 deg$^2$ field (CosmoDC2 catalogue) show that $29\pm6$
TDEs can be robustly found per year if observed at $u, g, r, i$ bands with
30-second exposure every 10 days, in which a discovery is defined as $\geq$10
epochal detections in at least two filters. If the WFST survey is fully
optimized for discovering TDE, we would expect to identify $392\pm74$ of TDEs
every year, with the redshift up to $z\sim0.8$, which poses a huge challenge to
follow-up resources.
