Publications

Results 4351–4375 of 9,998

Search results

Jump to search filters

Valley splitting of single-electron Si MOS quantum dots

Applied Physics Letters

Foulk, James W.; Harvey-Collard, Patrick; Jacobson, Noah T.; Baczewski, Andrew D.; Nielsen, Erik N.; Maurer, Leon; Montano, Ines; Rudolph, Martin; Carroll, M.S.; Yang, C.H.; Rossi, A.; Dzurak, A.S.; Muller, Richard P.

Silicon-based metal-oxide-semiconductor quantum dots are prominent candidates for high-fidelity, manufacturable qubits. Due to silicon's band structure, additional low-energy states persist in these devices, presenting both challenges and opportunities. Although the physics governing these valley states has been the subject of intense study, quantitative agreement between experiment and theory remains elusive. Here, we present data from an experiment probing the valley states of quantum dot devices and develop a theory that is in quantitative agreement with both this and a recently reported experiment. Through sampling millions of realistic cases of interface roughness, our method provides evidence that the valley physics between the two samples is essentially the same.

More Details
TYPE Journal Article YEAR 2016
DOIOSTIScopus

A particle-in-cell method for the simulation of plasmas based on an unconditionally stable field solver

Journal of Computational Physics

Bettencourt, Matthew T.; Wolf, Eric M.; Causley, Matthew; Christlieb, Andrew

We propose a new particle-in-cell (PIC) method for the simulation of plasmas based on a recently developed, unconditionally stable solver for the wave equation. This method is not subject to a CFL restriction, limiting the ratio of the time step size to the spatial step size, typical of explicit methods, while maintaining computational cost and code complexity comparable to such explicit schemes. We describe the implementation in one and two dimensions for both electrostatic and electromagnetic cases, and present the results of several standard test problems, showing good agreement with theory with time step sizes much larger than allowed by typical CFL restrictions.

More Details
TYPE Journal Article YEAR 2016
DOIOSTIScopus
Results 4351–4375 of 9,998
Results 4351–4375 of 9,998