What can quantum computers do? In this post, we explore the concept of many-body problem in quantum chemistry that may be one of the most immediate applications of quantum computers and quantum machine learning. A main goal of quantum chemistry is to predict the structure, stability, and reactivity of molecules. Modelling how each of these particles interact and affect each other is essentially impossible. In principle, this requires solving the SchrÃ¶dinger equation for the many-electron problem, a task that is so computationally intensive that even our modern supercomputers fail to perform them fast enough.