Coherence stabilization of a two-qubit gate by AC fields

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95137We consider a CNOT gate operation under the influence of quantum bit-flip noise and demonstrate that ac fields can change bit-flip noise into phase noise and thereby improve coherence up to several orders of magnitude while the gate operation time remains unchanged. Within a high-frequency approximation, both purity and fidelity of the gate operation are studied analytically. The numerical treatment with a Bloch-Redfield master equation confirms the analytical results.4 pages, 2 figuresMesoscale and Nanoscale PhysicsStatistical MechanicsCoherence stabilization of a two-qubit gate by AC fieldstext