Bloch oscillations are periodic oscillations of quantum particles in a repeating energy "landscape" (e.g., a crystal lattice) that are subjected to a constant force. These particle motions have been ...

Usually, an ambigram takes me about an hour from the moment of tackling the challenge with crude pencil sketches until the final artistic product has been rendered in felt-tip pen, in full color. Here ...

However, it wasn’t until July 6, 1785 that the Continental Congress established the dollar as the official currency of the United States: the first step towards creating a national monetary system.