Tavis-Cummings open quantum system modeling on a commercial quantum computer

Recent progress in experimental control of light-matter interaction has sparked renewed interest in simulations of large-Hilbert-space open quantum systems. An interesting playground for understanding a wide range of quantum phenomena exhibited by the open quantum systems is the Tavis-Cummings model, which reduces QED to an ensemble of N two-level systems interacting with an optical cavity. Full numerical treatment of these systems on a classical computer is limited to ensembles with a handful of emitters. In an attempt to overcome this limitation, we use Qiskit open source framework and IBM Q Experience quantum computers to model open Tavis-Cummings systems, exploring their energy ladder complexities and quantum state evolution. Finally, we discuss approaches toward optimal scaling.