Scientists have shown that certain algae which use quantum effects to optimize photosynthesis are also capable of switching it off. It's a discovery that could lead to highly efficient organic solar cells and quantum-based electronics.
Like quantum computers, some organisms are capable of scanning all possible options in order to choose the most efficient path or solution. For plants and some photosynthetic algae, this means the ability to make the most of the energy they receive and then deliver that energy from leaves with near perfect efficiency. This effect, called quantum decoherence, is what allows some algae to survive in very low levels of light.