Robust coherent control in non-Hermitian cavity electromagnonics using counterdiabatic driving

TL;DR

This paper introduces counterdiabatic driving and Floquet engineering to achieve fast, robust state transfer in non-Hermitian cavity magnon-polariton systems, outperforming non-Hermitian shortcuts especially under errors and higher gain rates.

Contribution

It demonstrates the effectiveness of counterdiabatic driving in non-Hermitian cavity electromagnonics for robust, high-efficiency state transfer, surpassing existing shortcuts in speed and error resilience.

Findings

Counterdiabatic driving achieves >99.9% transition probability.

CD technique is more robust than NHS under errors.

Speed of population transfer is faster with CD in broken-symmetry regime.

Abstract

We propose to use counterdiabatic driving (CD) shortcut and the Floquet engineering to realize the robust and fast state transfer in the dissipation cavity magnon-polaritons non-Hermitian (NH) system. For the two-level NH cavity magnon-polaritons Hamiltonian, an accurate and fast population transfer is achieved from the microwave photon to the magnon by two coherent control techniques; counterdiabatic driving shortcut and non-Hermitian shortcuts (NHSs). Additionally, by using the CD technique, the population evolution speed of non-Hermitian systems is faster than that via the NHS technique in the broken-symmetric regime. Furthermore, we compare their performances in the presence of the coupling strength and systematic errors, the CD technique features a broad range of high efficiencies of the transition probability above 99.9%, showing that the CD technique is more robustness against these errors than the NHS technique. It is worth noting that this advantage becomes more significant as the gain rate of system parameters increases. The work provides a basis for achieving the robust coherent control in NH cavity electromagnonics.