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Interactive Molecular Model Assembly with 3D Printing

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Modelling Conformational Flexibility in a Spectrally Addressable Molecular Multi-Qubit Model System.

Ciarán J Rogers¹, Deepak Asthana^1,2, Adam Brookfield¹

¹National Research Facility for Electron Paramagnetic Resonance Spectroscopy, Department of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.

Angewandte Chemie (International Ed. in English)

|October 12, 2022

Summary

Researchers developed a molecular multi-qubit system using three distinct electron spin centers. Pulsed Electron Paramagnetic Resonance (EPR) techniques confirmed controllable interactions, paving the way for quantum information processing (QIP).

Keywords:

Heterometallic Complexes Molecular Magnetism Multi-Spin Pulsed Dipolar Spectroscopy Quantum Information Processing

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Published on: April 19, 2021

Area of Science:

Quantum Information Science
Molecular Magnetism
Electron Paramagnetic Resonance (EPR) Spectroscopy

Background:

Molecular systems with multiple electron spins are promising for developing molecular qubits.
Controlling and addressing individual spins within a multi-spin system is crucial for quantum information processing (QIP).

Purpose of the Study:

To synthesize and characterize a molecular multi-qubit model system with three individually addressable spin centers.
To determine the strength of inter-qubit dipolar interactions using advanced EPR techniques.
To explore the potential for implementing EPR-based QIP algorithms.

Main Methods:

Synthesis of a molecular system comprising Cu(II), Cr7Ni ring, and nitroxide spin centers.
Utilizing pulsed Electron Paramagnetic Resonance (EPR) spectroscopy for characterization.
Employing Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) to measure inter-spin interactions.

Main Results:

Successfully synthesized a molecular multi-qubit system with three distinct spin centers (Cu(II), Cr7Ni ring, nitroxide).
os-RIDME revealed a strong correlation between Cu(II) and the Cr7Ni ring.
Switchable interactions between nitroxide and other spins were observed, dependent on relaxation dynamics.

Conclusions:

The synthesized system demonstrates individually addressable electron spin qubits with controllable interactions.
The observed switchable interactions provide a handle for implementing EPR-based quantum information processing (QIP) algorithms.
This work represents a significant step towards realizing molecular quantum computing devices.