Nonlinearity and Energy Conservation: A Possible Way to Harness Energy from the Subquantum Medium

In some situations nonlinearity seems to pervade in nature. Indeed, in adequate conditions, a minor action may give origin to a very large reaction, only apparently providing a gain in output power from a lesser inputted value. Extending de Broglie seminal ideas to a more general pilot-wave theory, we describe the relation between nonlinearity and energy conservation, dismissing any apparent contradiction between the two. We also present what seems to be a possible way to harness energy from the pervading subquantum medium.