6533b833fe1ef96bd129b9b6
RESEARCH PRODUCT
Features of level broadening in a ring-stub system
P. Singha DeoMichael Moskaletssubject
PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsComplex energyMesoscale and Nanoscale Physics (cond-mat.mes-hall)Life timeAnchoringFOS: Physical sciencesElectronAtomic physicsHomogeneous broadeningMolecular physicsMagnetic fluxStub (electronics)description
When a one dimensional (1D) ring-stub system is coupled to an electron reservoir, the states acquire a width (or broadening characterized by poles in the complex energy plane) due to finite life time effects. We show that this broadening is limited by anti-resonances due to the stub. The differences in level broadening in presence and absence of anti-resonance is exemplified by comparison to a 1D ring coupled to an infinite reservoir. We also show that the anti-resonances due to the stub has an anchoring effect on the poles when a magnetic flux through the ring is varied. This will have implication on change in distribution of the poles in disordered multichannel situation as magnetic flux is varied.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-04-15 |