  In the presence of chemical potential and temperature, we holographically
study subregion complexity in a non-conformal quantum field theory with a
critical point. We propose a new interpretation according to which the states,
needing (more) less information to be specified, characterize the (un) stable
thermodynamical solutions. We observe the increasing and decreasing effects of
chemical potential and temperature on holographic subregion complexity,
respectively. These two opposite behaviors lead to a point where subregion
complexity of the mixed state is the same as this value for a zero temperature
conformal field theory. We also present a new description of the difference
between the minimum and the maximum value (the value near the critical point)
of holographic subregion complexity as a resource for doing computational work
to prepare the state near the critical point from the state far from it. We
also calculate the critical exponent.
