On the compatibility between the adiabatic and the rotating wave approximations in quantum control

TL;DR

This paper investigates the conditions under which the adiabatic and rotating-wave approximations can be simultaneously applied in quantum control, enabling robust state transitions in multi-level quantum systems.

Contribution

It establishes the compatibility conditions for combining the adiabatic and rotating-wave approximations in quantum control, extending results beyond two-level systems.

Findings

Approximations can be combined under certain time-scale hypotheses.

Control laws can be designed for robust state transitions.

Results applicable to higher-dimensional quantum systems.

Abstract

In this paper, we discuss the compatibility between the rotating-wave and the adiabatic approximations for controlled quantum systems. Although the paper focuses on applications to two-level quantum systems, the main results apply in higher dimension. Under some suitable hypotheses on the time scales, the two approximations can be combined. As a natural consequence of this, it is possible to design control laws achieving transitions of states between two energy levels of the Hamiltonian that are robust with respect to inhomogeneities of the amplitude of the control input.