USS Hopping (DE-155) was a Buckley-class destroyer escort in service with the United States Navy from 1943 to 1947. In 1944, she was converted to a Charles Lawrence-class high speed transport and redesignated "APD-51". She was sold for scrap in 1966.
Suppose two orthogonal neighbouring orbitals ##|\phi _1 \rangle## and ##|\phi _2 \rangle## so that ##\langle \phi_1|\phi _2 \rangle =0##. Applying an electric field adds a new term ##u (c_1^{\dagger}c_1-c_2^{\dagger}c_2)## to the Hamiltonian which u is a constant potential. Obviously, we still...