Nonequilibrium dynamics of the Jaynes-Cummings dimer

Area of Science:

• Quantum optics
• Quantum information science
• Condensed matter physics

Background:

• Investigating nonequilibrium dynamics in coupled quantum systems is essential for understanding complex phenomena.
• Jaynes-Cummings systems and Josephson junctions are fundamental for quantum electrodynamics and superconducting circuits.

Purpose of the Study:

• To analyze the nonequilibrium dynamics of a Josephson-coupled Jaynes-Cummings dimer with Kerr nonlinearity.
• To explore photonic Josephson oscillations, self-trapping phenomena, and quantum effects like entanglement.

Main Methods:

• Semiclassical analysis of dynamics to identify oscillation regimes and stability.
• Quantum mechanical study to characterize steady states and quantum phenomena.
• Investigation of mutual information and photon population imbalance for entanglement generation.

Main Results:

• Identified various photonic Josephson oscillations and their stability regimes.
• Observed self-trapping leading to photon population imbalance and quantum effects like spin dephasing and revival.
• Demonstrated a correlation between mutual information and photon imbalance, promising for controlled entanglement.

Conclusions:

• The study provides insights into nonequilibrium dynamics and self-trapping in quantum systems.
• Results highlight potential for generating photon-mediated entanglement between qubits.
• Findings are relevant for quantum information processing and quantum technologies.