White dwarf (WD) binaries are both ubiquitous (as a Sun-like star will evolve into a WD) and exciting (as potential progenitors of type-Ia supernovae). Examining tides in them can thus lead to advancements in both stellar evolution and cosmology.

Galactic WD binaries are especially interesting because they are observable by both ground-based photometry and space-borne gravitational-wave observatories like LISA. They are thus sources for multi-messenger astronomy. My studies aim to address how tidal interactions affect both the optical and gravitational-wave signals.