Inverse engineering rigorous adiabatic Hamiltonian for non-Hermitian system

TL;DR

This paper extends the quantum adiabatic theorem to non-Hermitian systems, proposing an inverse engineering method that effectively drives quantum states even with noise and dissipation, enhancing quantum-state engineering capabilities.

Contribution

It introduces a rigorous adiabaticity condition for non-Hermitian systems and develops an inverse engineering approach for adiabatic quantum state control.

Findings

The scheme works well under noise with proper parameter choices.

Desired quantum states can be achieved by adjusting magnetic fields.

Noise and dissipation can positively influence the scheme.

Abstract

We generalize the quantum adiabatic theorem to the non-Hermitian system and build a rigorous adiabaticity condition with respect to the adiabatic phase. The non-Hermitian Hamiltonian inverse engineering method is proposed for the purpose to adiabatically drive a artificial quantum state. For the sake of clearness, we take a concrete two-level system as an example to show the usefulness of the inverse engineering method. The numerical simulation result shows that our scheme can work well even under noise if the parameters are chosen appropriately. We can obtain the desired target state by adjusting extra rotating magnetic fields at a predefined time. Furthermore, certain noise and dissipation in the systems is no longer undesirable, but plays a positive role in our scheme. Therefore, our scheme could provide more choices for the realization of quantum-state engineering.