Laser‐Induced Optimization of Entanglement and Coherence in a Two‐Qubit Molybdenum Disulfide System

Abstract

ABSTRACT The quantum information properties of a monolayer of molybdenum disulfide exposed to a polarized monochromatic electromagnetic field are investigated. Using the density matrix at thermal equilibrium, total and correlated quantum coherence (quantified by the ‐norm) and thermal entanglement (using concurrence) are analyzed. Without external radiation, entanglement is favored at low temperatures and for small band gap, spin‐orbit coupling, and wave vector, but rapidly disappears under thermal fluctuations, while coherence remains robust. Under a laser field, entanglement, although reduced, becomes more resistant to temperature rise, while coherence is strongly amplified. Photon‐assisted transitions renormalize the band structure and introduce new couplings between electronic states, partially stabilizing non‐local correlations and reinforcing quantum superpositions. Field strength, frequency, and polarization are key control parameters, with circular polarization providing the most favorable conditions for simultaneously enhancing coherence and entanglement. The results demonstrate the dual role of electromagnetic radiation as a stabilizer and amplifier of quantum correlations and highlight the potential of molybdenum disulfide for applications in quantum computing, secure communication, and high‐precision detection.