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This research identifies that approximately 600 atomic nuclei in the host material limit spin coherence in organic quantum sensors under high magnetic fields, whereas only six nuclei are responsible at zero field. By mapping these specific decoherence mechanisms through first-principles calculations, the study provides a clear pathway to extend quantum state lifetimes for improved sensing applications. This fundamental insight directly advances the practical utility of organic molecules in quantum technologies.
Glasgow Team Finds 600 Nuclei Limit Spin Coherence
Six nuclear spins within a molecule dictate coherence at low fields, yet this number swells to approximately six hundred under higher field conditions. This distinction, revealed through detailed modelling of pentacene coupled with para-terphenyl, illuminates previously obscured mechanisms driving spin decoherence. Manipulating specific parameters extends coherence times, offering new routes towards improved organic quantum sensors.
How can we pinpoint which atomic nuclei most strongly limit spin coherence in organic molecules used as quantum sensors. First principles calculations have systematically mapped how nuclear interactions cause decoherence, the loss of quantum information, in pentacene guest molecules embedded within a para-terphenyl host. Different mechanisms cause loss of quantum signals at low and high magnetic fields in organic materials. Approximately six atomic nuclei within pentacene molecules…
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