Electromagnetic micromotor is an ideal micro actuator for MEMS, micro robot and micro movable elements, because of it's large output torque, long lifetime and easy in practical applications.

"The lifetime of the universe isn't long enough for that," Dr. Koch said. "There are immense practical problems with the theory, but that was also true for the theory of general relativity early on."

The delay time ought to be smaller than the lifetime of the excited molecule in the practical use of the OODR-MPI technique.