Search for double beta decay processes in XENON1T*

XENON1T was built to detect interactions from dark matter particles and has placed the most stringent limits on the coherent elastic scattering cross-section of weakly interacting massive particles on nucleon. With one of the lowest electronic recoil background from keV to MeV scale, XENON1T data provides a unique opportunity to explore neutrino physics, particularly the search for double beta decay processes. In this talk, I will describe the search for two neutrino double electron capture of ¹²⁴Xe and neutrinoless double beta decay of ¹³⁶Xe in XENON1T data.