1. A method of copying a classical state of a first qubit to a second qubit, the method comprising: initializing the second qubit to an initial classical state, wherein the second qubit has a potential energy configuration comprising a first potential well having a first potential minimum and a second potential well having a second potential minimum, and the initial classical state is located in the first potential well; adjusting the first potential minimum of the first potential well to a third potential minimum that is higher than the second potential minimum of the second potential well; and coupling the first qubit and the second qubit for a duration t.