Entangling remote nuclear spins linked by a chromophore.

Area of Science:

• Quantum Information Science
• Molecular Nanotechnology
• Quantum Computing

Background:

• Molecular nanostructures are promising for quantum technologies, requiring full control over their degrees of freedom.
• Nuclear spins offer low-decoherence qubits, while optical excitations enable fast, controllable interactions.
• Harnessing these properties is key to advancing quantum computing and communication.

Purpose of the Study:

• To present a novel method for entangling two nuclear spins.
• To investigate the feasibility of this method using molecular nanostructures.
• To identify molecular properties crucial for high-fidelity quantum gates.

Main Methods:

• Utilized density-functional theory (DFT) for theoretical calculations.
• Conducted experiments on a test molecule to validate the proposed method.
• Investigated entanglement mediated by a transient, optically excited electron spin.

Main Results:

• Demonstrated a method for entangling two nuclear spins via a shared electron spin.
• DFT calculations identified specific molecular properties enabling high entangling power.
• Confirmed feasibility through experimental validation on a model molecular system.

Conclusions:

• The presented method offers a viable route to entangle nuclear spins using molecular nanostructures.
• Specific molecular designs can facilitate high-fidelity quantum gates with optical and microwave control.
• Established synthesis techniques make these molecules accessible for quantum technology development.