Self-induced quantum noise prompting ferron states transition in anti-ferromagnetic cluster: Solid state qubits

Abstract

The paper models a two-level system due to an impurity in an antiferromagnetic cluster and interacting with the phonon and magnon cloud or their coupling (so-called f-quantum-noise field) forming the so-called blended ferron which is subjected to an applied magnetic field that tailors the dynamics of individual states resulting in qubit formation as well as Landau–Zener-type transitions. The exact transition amplitude is calculated via the dynamic matrix approach (DMA). The transition probability is observed to be tailored by the electron–phonon and electron–magnon coupling constants while the renormalized probability by the f-quantum-noise field effects. The fast-driven-regime provokes system’s complete blockage while the blended ferron survives in the initial states where the transitions are forbidden. The slow-driven-regime provokes LZ-type-transition with the final states resulting in qubit formation.