= Resonant antidot backscattering
A closed <antidot> edge orbit can tunnel-couple extended channels on opposite edges. When its electrochemical energy aligns with the reservoirs, resonant backscattering reduces conductance from an otherwise transmitting integer plateau. Different connectivity can instead add a transmission path and produce peaks. Gate <voltage> changes both the orbit and tunnel couplings; charging and <spin> alter the simplest fixed-area Aharonov-Bohm resonance sequence.
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