10.1007/s10955-008-9561-8
Adami, Riccardo
Riccardo
Adami
László Erdös
László
Erdös0000-0001-5366-9603
Rate of decoherence for an electron weakly coupled to a phonon gas
Springer
2008
2018-12-11T11:59:25Z
2019-04-26T07:22:19Z
journal_article
https://research-explorer.app.ist.ac.at/record/2754
https://research-explorer.app.ist.ac.at/record/2754.json
We study the dynamics of an electron weakly coupled to a phonon gas. The initial state of the electron is the superposition of two spatially localized distant bumps moving towards each other, and the phonons are in a thermal state. We investigate the dynamics of the system in the kinetic regime and show that the time evolution makes the non-diagonal terms of the density matrix of the electron decay, destroying the interference between the two bumps. We show that such a damping effect is exponential in time, and the related decay rate is proportional to the total scattering cross section of the electron-phonon interaction.