Explaining the Turing principle using the PC is difficult. In, fact it is difficult enough to state the Turing principle in the language of the PC
The Church Turing thesis is a fact about computation as well as physics. As such , there is no particular reason it should be easily expressed in physics.
The Church Turing thesis is a fact about computation as well as physics. As such , there is no particular reason it should be easily expressed in physics.