Interaction picture as any other operator. In particular, let and be the density matrices in the interaction picture and the Schrödinger picture respectively. If there is probability to be in the physical state |"ψ"〉, then Transforming the Schrödinger equation into the interaction picture gives which states that in the interaction picture, a quantum state is evolved by the interaction part of the Hamiltonian as expressed in the interaction picture. If the operator "A" is time-independent (i.e., does not have "explicit time dependence"; see above), then the corresponding time evolution for "A"("t") is given by In the interaction picture the operators evolve in
The Theoretical Minimum was published in 2017. This covers Special Relativity and Classical Field Theory Lectures in the remaining three courses, on are available on-line as video recordings. Further lecture courses in the Theoretical Minimum series have been delivered by Prof. Susskind, on and these are also available on-line as video recordings. The Theoretical Minimum The Theoretical Minimum: What You Need to Know to Start Doing Physics () is a popular science book by Leonard Susskind and George Hrabovsky. The book was initially published on January 29, 2013 by Basic Books. The book is a mathematical introduction to various theoretical physics concepts, such