Octopus, a computational framework for exploring light-driven phenomena and quantum dynamics in extended and finite...

Area of Science:

• Computational Materials Science
• Quantum Mechanics
• Condensed Matter Physics

Background:

• Recent advances in experimental and theoretical tools allow precise control of matter at atomic and short time scales.
• Engineering materials with tailored properties requires selective manipulation at the quantum level.
• Accurate simulation of light-induced changes in complex systems is crucial for materials design.

Purpose of the Study:

• To present new features and technical developments in the Octopus ab initio simulation tool.
• To describe theoretical advancements for simulating ultrafast light-driven processes.
• To enable the scientific community to simulate and characterize novel light-matter interactions and emergent states of matter.

Main Methods:

• Utilizing a first-principles real-space-based approach within the Octopus project.
• Implementing generalized time-dependent density functional theory (TDDFT) for quantum mechanical effects.
• Developing a quantum electrodynamics density-functional formalism for novel light-matter hybrid states.

Main Results:

• Enhanced performance and massive parallelism in Octopus simulations.
• New theoretical framework for describing ultrafast light-driven processes.
• Capabilities to simulate and characterize time-resolved spectroscopies and emergent quantum states.

Conclusions:

• The Octopus package provides a unique framework for simulating non-equilibrium phenomena in diverse systems.
• Recent developments significantly improve the simulation of light-matter interactions and ultrafast dynamics.
• Future releases will further empower the scientific community in exploring quantum electrodynamical-materials.