2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17678In the bilayer quantum Hall system, a spontaneously charge imbalance state appears at the ground energy level. Gap in the collective excitation energy makes it stable against decoherence in macroscopic level. This state behaves as a spin 1/2 representation of SU(2) and can be controlled by applying the interlayer voltage. We suggest this system can be regarded as a macroscopic realization of a qubit for a quantum computer.9 pagesMesoscale and Nanoscale PhysicsQuantum Physicstext