✦ LIBER ✦
Perturbation theory for Wannier resonance states affected by ac field
✍ Scribed by M. Glück; A.R. Kolovsky; H.J. Korsch
- Book ID
- 104337533
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 187 KB
- Volume
- 258
- Category
- Article
- ISSN
- 0375-9601
No coin nor oath required. For personal study only.
✦ Synopsis
The paper studies the effect of a weak ac field on the Wannier states, which are known to be the metastable states of a quantum particle in a periodic potential subject to a static field. Provided that the photon energy exactly matches the spacing of the Wannier-Stark ladder the system complex quasienergy spectrum is obtained. It is shown, in particular, that a weak ac field can increase the lifetime of the Wannier states by several orders of magnitude. The analytical results of a perturbation theoretical analysis are compared against the exact numerical calculation of the system spectrum.