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

Ciaran Rogers; Deepak Asthana; Adam Brookfield; Alessandro Chiesa; Grigore Timco; David Collison; Louise Natrajan; Stefano Carretta; Richard Winpenny; Alice Bowen

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

Ciaran Rogers, Deepak Asthana, Adam Brookfield, Alessandro Chiesa, Grigore Timco, David Collison, Louise Natrajan, Stefano Carretta, Richard Winpenny, Alice Bowen

Research output: Contribution to journal › Article › peer-review

Abstract

Dipolar coupled multi-spin systems have the potential to be used as molecular qubits. Herein we report the synthesis of a molecular multi-qubit model system with three individually addressable, weakly interacting, spin ½ centres of differing g-values. We use pulsed Electron Paramagnetic Resonance (EPR) techniques to characterise and separately address the individual electron spin qubits; Cu(II), Cr7Ni ring and a nitroxide, to determine the strength of the inter-qubit dipolar interaction. Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) detecting across the Cu(II) spectrum revealed a strongly correlated Cu(II)-Cr7Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and Cu(II) or nitroxide and Cr7Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR-based quantum information processing (QIP) algorithms.

Original language	English
Journal	Angewandte Chemie. International Edition
Publication status	Accepted/In press - 28 Jul 2022

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title = "Modelling Conformational Flexibility in a Spectrally Addressable Molecular Multi-Qubit Model System",

abstract = "Dipolar coupled multi-spin systems have the potential to be used as molecular qubits. Herein we report the synthesis of a molecular multi-qubit model system with three individually addressable, weakly interacting, spin ½ centres of differing g-values. We use pulsed Electron Paramagnetic Resonance (EPR) techniques to characterise and separately address the individual electron spin qubits; Cu(II), Cr7Ni ring and a nitroxide, to determine the strength of the inter-qubit dipolar interaction. Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) detecting across the Cu(II) spectrum revealed a strongly correlated Cu(II)-Cr7Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and Cu(II) or nitroxide and Cr7Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR-based quantum information processing (QIP) algorithms.",

author = "Ciaran Rogers and Deepak Asthana and Adam Brookfield and Alessandro Chiesa and Grigore Timco and David Collison and Louise Natrajan and Stefano Carretta and Richard Winpenny and Alice Bowen",

year = "2022",

month = jul,

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language = "English",

journal = "Angewandte Chemie. International Edition",

issn = "1433-7851",

publisher = "John Wiley & Sons Ltd",

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TY - JOUR

T1 - Modelling Conformational Flexibility in a Spectrally Addressable Molecular Multi-Qubit Model System

AU - Rogers, Ciaran

AU - Asthana, Deepak

AU - Brookfield, Adam

AU - Chiesa, Alessandro

AU - Timco, Grigore

AU - Collison, David

AU - Natrajan, Louise

AU - Carretta, Stefano

AU - Winpenny, Richard

AU - Bowen, Alice

PY - 2022/7/28

Y1 - 2022/7/28

N2 - Dipolar coupled multi-spin systems have the potential to be used as molecular qubits. Herein we report the synthesis of a molecular multi-qubit model system with three individually addressable, weakly interacting, spin ½ centres of differing g-values. We use pulsed Electron Paramagnetic Resonance (EPR) techniques to characterise and separately address the individual electron spin qubits; Cu(II), Cr7Ni ring and a nitroxide, to determine the strength of the inter-qubit dipolar interaction. Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) detecting across the Cu(II) spectrum revealed a strongly correlated Cu(II)-Cr7Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and Cu(II) or nitroxide and Cr7Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR-based quantum information processing (QIP) algorithms.

AB - Dipolar coupled multi-spin systems have the potential to be used as molecular qubits. Herein we report the synthesis of a molecular multi-qubit model system with three individually addressable, weakly interacting, spin ½ centres of differing g-values. We use pulsed Electron Paramagnetic Resonance (EPR) techniques to characterise and separately address the individual electron spin qubits; Cu(II), Cr7Ni ring and a nitroxide, to determine the strength of the inter-qubit dipolar interaction. Orientation selective Relaxation-Induced Dipolar Modulation Enhancement (os-RIDME) detecting across the Cu(II) spectrum revealed a strongly correlated Cu(II)-Cr7Ni ring relationship; detecting on the nitroxide resonance measured both the nitroxide and Cu(II) or nitroxide and Cr7Ni ring correlations, with switchability of the interaction based on differing relaxation dynamics, indicating a handle for implementing EPR-based quantum information processing (QIP) algorithms.

M3 - Article

JO - Angewandte Chemie. International Edition

JF - Angewandte Chemie. International Edition

SN - 1433-7851

ER -

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

Abstract

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