The term “soft matter” refers to a very large class of materials, whose common characteristic is that they are composed of mesoscopic particles, i.e. particles with typical sizes ranging from 1 nm to a few microns.
Physical Biology covering a range of fields that bridge the biological and physical sciences, including biophysics, systems biology, population dynamics, etc.
Statistical physics sets out to explain how the patterns and structures around us in the macroscopic world arise from the interactions between their component parts.
Quantum complexity theory is the subfield of computational complexity theory that deals with complexity classes defined using quantum computers, a computational model based on quantum mechanics.