2011/09/30 by Jamie Gardner, Jamie Ryan Gardner, Steven Bennett +2
Physics and Astronomy · #Adiabatic process #Cantilever #Condensed matter physics #Electron #Force Microscopy Techniques and Applications #Materials science #Mechanical and Optical Resonators #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum tunnelling #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.84.205316
published as Phys. Rev. B 84, 205316 (2011) · 6 pages, 2 figures
arxiv created 2011/11/09 · openalex publication_date 2011/11/16 · arxiv updated 2011/11/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study theoretically the interaction between the charge dynamics of a few-electron double quantum dot and a capacitively coupled atomic force microscopy cantilever, a setup realized in several recent experiments. We demonstrate that the dot-induced frequency shift and damping of the cantilever can be used as a sensitive probe of coherent interdot tunneling, and that these effects can be used to quantitatively extract both the magnitude of the coherent interdot tunneling and (in some cases) the value of the double-dot T1 time. We also show how the adiabatic modulation of the dot eigenstates by the cantilever motion leads to substantial effects which are completely absent in the more studied single-dot case.