Quantum Entanglement in Two-Photon Rabi Stark Model

Abstract: In this is work, an investigation on the two-photon Rabi Stark model as a function of the coupling strength under the effect of different Stark coupling strength values is treated. Here, we numerically explore the spectral collapse of the \textit{2pRSM} as a function of the qubit-cavity field coupling strength to gain further physical insights. Also, the visualization of Wigner function in purpose to study the non-classicality in ground-state of the system. At the last, we measure the quantum entanglement via von Neumann Entropy for different ratios of the Stark coupling strength. This work deepens the understanding of the role played by the Stark coupling strength determining the quantum entanglement.