Tabletop fusion, nuclear fusion on the tabletop, can be achieved with:
Bubble fusion (sonofusion), an application of the rapid collapse of bubbles induced by sound waves Pyroelectric fusion, an application of intense electric fields within a crystal Inertial electrostatic confinement fusion, an application of intense electric fields Fusor, an inertial electrostatic confinement based fusion reactor design, some of which are sized to fit on tables