  In this White Paper for the 2021 Snowmass process, we detail the status and
prospects for dual-readout calorimetry. While all calorimeters allow estimation
of energy depositions in their active material, dual-readout calorimeters aim
to provide additional information on the light produced in the sensitive media
via, for example, wavelength and polarization, and/or a precision timing
measurements, allowing an estimation of the shower-by-shower particle content.
Utilizing this knowledge of the shower particle content may allow unprecedented
energy resolution for hadronic particles and jets and new types of particle
flow algorithms. We also discuss the impact continued development of this kind
of calorimetry could have on precision on Higgs boson property measurements at
future colliders.
