Modular Approach to Creating Functionalized Surface Arrays of Molecular Qubits

Area of Science:

• Quantum technology
• Materials science
• Molecular engineering

Background:

• Molecular spins are promising qubit candidates for quantum technologies due to long coherence times and tunability.
• Integrating molecular spin qubits into quantum devices via thin films or monolayers on surfaces remains a significant challenge.
• The impact of surface integration on the quantum properties and spin dynamics of molecular qubits is not well understood.

Purpose of the Study:

• To develop a versatile method for arranging molecular qubits as functional groups in self-assembled monolayers (SAMs) on surfaces.
• To demonstrate the preservation and potential enhancement of quantum properties of molecular qubits when integrated into monolayers.
• To investigate the changes in spin dynamics of molecular qubits from bulk to monolayer configurations.

Main Methods:

• Utilized a bottom-up approach combining molecular self-organization and click chemistry.
• Fabricated self-assembled monolayers (SAMs) functionalized with molecular qubits on surfaces.
• Characterized the quantum properties and spin dynamics of the molecular qubits in the monolayer system.

Main Results:

• Successfully arranged molecular qubits as functional groups within SAMs on surfaces.
• Demonstrated coherence times of up to 13 µs for molecular qubits in monolayers.
• Observed that qubit properties are maintained or even enhanced in the monolayer configuration compared to bulk.

Conclusions:

• The reported bottom-up method effectively integrates molecular qubits into SAMs on surfaces, preserving their quantum properties.
• The findings provide crucial evidence for the viability of molecular spin qubits in surface-based quantum devices.
• This work opens new avenues for advancing quantum computing and sensing technologies using molecular systems.