Rabi oscillations of strongly driven Bose polarons

Understanding the dynamical behavior of quasiparticles is essential for uncovering quantum many-body phenomena. Among these phenomena, the polaron in ultracold atomic gases has attracted considerable interest due to its precise controllability. By engineering the underlying Hamiltonian, polarons serve as a versatile platform for studying both equilibrium properties and nonequilibrium dynamics. In this work, we investigate the quantum dynamics of strongly driven Bose polarons, where minority atoms are described as mobile impurities with spin-1/2, and majority atoms are bosons. The spin- <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mo>↑</a:mo> </a:math> impurity interacts with majority atoms through a tunable scattering length <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"> <b:mi>a</b:mi> </b:math> , while the spin- <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"> <c:mo>↓</c:mo> </c:math> impurity remains noninteracting. After turning on the Rabi coupling, we calculate the evolution of the total magnetization using a trial wavefunction. We identify the exhibition of anomalous Rabi oscillation and steady-state magnetization for <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"> <d:mrow> <d:mi>a</d:mi> <d:mo>&gt;</d:mo> <d:mn>0</d:mn> </d:mrow> </d:math> , due to the interplay between attractive and repulsive polarons. Our results provide a concrete example that illustrates how Rabi oscillations are dressed by system-environment coupling.