Control theory provides a mathematical and conceptual framework for influencing the behaviour of dynamic systems so that they perform in a desired manner. In the linear domain, systems are described ...

Exceptional points, or EPs for short, are among the phenomena of modern physics. These are special points or locations at which the properties of matter, space or time change. In a new theoretical ...

Many systems obey simple, linear rules: If you pull twice as hard on a spring, it stretches twice as far. However, when we introduce very large forces or complicated interactions, that linear rule ...