Robust Entanglement Generation in Lithium Ions Mediated by Graphene Quantum Dots Interaction

Area of Science:

• Quantum Information Science
• Materials Science
• Atomic and Molecular Physics

Background:

• Graphene quantum dots (GQDs) are promising for quantum information tasks.
• Interactions between quantum dots and ions can be engineered for specific functionalities.

Purpose of the Study:

• To numerically investigate electronic transitions in a GQD-Li+ ion system.
• To explore the potential for controlled quantum information processing.

Main Methods:

• Numerical simulations of electronic transitions.
• Analysis of GQD-Li+ ion interactions.
• Application of external electric fields.

Main Results:

• Identified a specific ion distance range allowing only GQD → Li+ transitions.
• Demonstrated controlled electronic transitions for both Li+ ions in a symmetric configuration using electric fields.
• Achieved robust entanglement generation by inhibiting reverse electronic transitions.

Conclusions:

• The proposed GQD-Li+ system offers a viable platform for quantum information processing.
• Precise control over electronic transitions enables robust entanglement generation.
• This system holds potential for developing advanced quantum technologies.