Unlocking the Potential of Photoexcited Molecular Electron Spins for Room Temperature Quantum Information Processing

• URL: http://arxiv.org/abs/2408.16743v1
• Date: Thu, 29 Aug 2024 17:36:30 GMT
• Title: Unlocking the Potential of Photoexcited Molecular Electron Spins for Room Temperature Quantum Information Processing
• Authors: Kuan-Cheng Chen, Alberto Collauto, Ciarán J. Rogers, Shang Yu, Mark Oxborrow, Max Attwood,
• Abstract summary: Future information processing technologies like quantum memory devices have the potential to store and transfer quantum states to enable quantum computing and networking. Here, we employ an organic radical, $alpha$,$gamma$-bisdiphenylene-$beta$-phenylallyl (BDPA) doped into an o-terphenyl host to explore the potential for using tuneable and high-performance molecular media in microwave-based quantum applications. We demonstrate that this radical system exhibits millisecond-long spin-lattice relaxation and microsecond-long phase memory times at room temperature, while also having the capability to generate an
• Score: 0.24739484546803336
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Future information processing technologies like quantum memory devices have the potential to store and transfer quantum states to enable quantum computing and networking. A central consideration in practical applications for such devices is the nature of the light-matter interface which determines the storage state density and efficiency. Here, we employ an organic radical, $\alpha$,$\gamma$-bisdiphenylene-$\beta$-phenylallyl (BDPA) doped into an o-terphenyl host to explore the potential for using tuneable and high-performance molecular media in microwave-based quantum applications. We demonstrate that this radical system exhibits millisecond-long spin-lattice relaxation and microsecond-long phase memory times at room temperature, while also having the capability to generate an oscillating spin-polarized state using a co-dissolved photo-activated tetraphenylporphyrin moiety, all enabled by using a viscous liquid host. This latest system builds upon collective wisdom from previous molecules-for-quantum literature by combining careful host matrix selection, with dynamical decoupling, and photoexcited triplet-radical spin polarisation to realise a versatile and robust quantum spin medium.

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