Hvad betyder fast form og flydende form?
Ground state
Grundtilstanden i et kvantemekanisk system er dets lavenergitilstand; energien i grundtilstanden er kendt som systemets nulpunktsenergi. En exciteret tilstand er enhver tilstand med en energi, der er større end grundtilstanden. I kvantefeltteorien kaldes grundtilstanden normalt for vakuumtilstanden eller vakuumet.
Ground state
The ground state of a quantum mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system. An excited state is any state with energy greater than the ground state. In the quantum field theory, the ground state is usually called the vacuum state or the vacuum.
Ground state