2008/04/14 by Solomon Duki, Duki, Solomon, Harsh Mathur +1
Physics and Astronomy · #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Other Condensed Matter (cond-mat.other) #Quantum and electron transport phenomena #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.0804.2210
openalex publication_date 2008/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider the application of a small in-plane magnetic field to electrons on a helium surface in a perpendicular magnetic field. Certain states that were bound to the helium surface then dissolve into the continuum turning into long-lived resonances. As a result microwave absorption lines acquire an asymmetric Fano lineshape that is tunable by varying the microwave polarisation or the in-plane magnetic field. Electrons trapped in a formerly bound state will tunnel off the surface of helium; we show that under suitable circumstances this ``radioactive decay'' can show damped oscillations rather than a simple exponential decay. The mechanism for oscillatory exponential decay is not specific to electrons on Helium and this effect may also be relevant elsewhere in physics.