Embedded quantum correlations in thermalized quantum Rabi systems

We study the quantum correlations embedded in open Rabi systems. Specifically, we how correlation depends on coupling strength, number of qubits, and reservoir temperatures. numerically calculate up to three qubits interacting with a single field mode. find that exhibit maximum for given which inversely subsystems temperature. explore this feature affects performance many-qubit Otto heat engine, finding numerical evidence direct correspondence between minimum extractable work qubit-cavity bipartition. Furthermore, as increase is reached at smaller values strength. This paper could help design more sophisticated engines rely many-body systems working substances.