title: The role of many-particle excitations in Coulomb blockaded transport.
abstract: We discuss the role of electron-electron and electron-phonon correlations in current flow in the Coulomb blockade regime, focusing specifically on non-trivial signatures arising from the breakdown of mean-field theory. By solving transport equations directly in Fock space, we show that electron-electron interactions manifest as gateable excitations experimentally observed in the current-voltage characteristic. While these excitations might merge into an incoherent sum that allows occasional simplifications, a clear separation of excitations into slow 'traps' and fast 'channels' can lead to further novelties such as negative differential resistance, hysteresis and random telegraph signals. Analogous novelties for electron-phonon correlation include the breakdown of commonly anticipated Stokes-anti-Stokes intensities, and an anomalous decrease in phonon population upon heating due to reabsorption of emitted phonons.
authors.affiliation: School of Electrical and Computer Engineering and the Network for Computational Nanotechnology, Purdue University, West Lafayette, IN 47907, USA. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: B
authors.initials: B
authors.lastname: Muralidharan
authors.forename: L
authors.initials: L
authors.lastname: Siddiqui
authors.forename: A W
authors.initials: AW
authors.lastname: Ghosh