@article{oai:mie-u.repo.nii.ac.jp:00004916,
 author = {Senoo, Masafumi and 妹尾, 允史 and Suzuki, Yasuyuki and 鈴木, 泰之},
 journal = {Research reports of the Faculty of Engineering, Mie University},
 month = {Dec},
 note = {application/pdf, A new force operator, ħ∂2/∂t∂x, is proposed, which is obtained from differentiating of momentum expectration of a quantum perticle by time. A wavefunction is approximated to a planewave, this operator is worked to the wavefunction ; then, force expectation, ħkω, is obtained. We call this force expectation 'marion force'. It is the same as working force to a quantum particle which moves cyclic in a central force potential like centrifugal force on the Bohr model. Apllication of the marion force is proposed as a concept which is able to be understood easily and intuitively when mechanical property of mechanical materials is analyzed. The marion force is calculated as a function if electron density in free-electron solids, average presure from this marion force is proportional to five-thirds power of electron density. This pressure is in a good agreement to virial pressure which is obtained thermodynamically from average energy of free electrons.},
 pages = {1--8},
 title = {A Force Theorem by Electron Momentum in Solids},
 volume = {16},
 year = {1991}
}