Abstract
We propose a new approach to calculate current and current correlations in a ballistic quantum point contact interacting with a classical field. The approach is based on the concept of scattering states for a time-dependent Hamiltonian neglecting electron-electron interaction. Using this approach we calculate the spectra of the current noise in a biased point contact irradiated by a weak random field. For typical radiation frequencies less than the temperature and the bias voltage , we find a narrow peak of width on top of a broad background of width .
- Received 10 March 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.1399
©1999 American Physical Society