Optimization of selective two-photon absorption in cavity polaritons.

Area of Science:

• Quantum optics
• Quantum information science
• Atomic physics

Background:

• Multilevel quantum systems are crucial for quantum technologies.
• Two-photon absorption is a key process for exciting specific energy levels.
• Quantum correlations in light can influence excitation dynamics.

Purpose of the Study:

• To determine the optimal photon pair states for exciting a target transition in a multilevel quantum system.
• To compare the population transfer efficiency of entangled versus separable photon states.
• To investigate the role of quantum correlations in enhancing selective excitation.

Main Methods:

• Application of coherent control theory to two-photon absorption.
• Analysis of quantum light states (entangled and separable).
• Quantification of population transfer and excitation selectivity.

Main Results:

• Entangled photon states achieve maximal population transfer compared to separable states.
• Quantum correlations enhance selectivity by overcoming interference between excitation pathways.
• The benefit of entangled states increases with the broadening of target state linewidths.

Conclusions:

• Entangled photon pairs offer a significant advantage for precise quantum state manipulation.
• Quantum correlations are a powerful tool for achieving high selectivity in quantum system excitation.
• The findings have implications for designing advanced quantum optical experiments and technologies.