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Correlated noise in Brownian motion allows for super resolution
Santiago Oviedo-Casado1, Amit Rotem2, Ramil Nigmatullin3
1Racah Institute of Physics, The Hebrew University of Jerusalem, 91904, Jerusalem, Givat Ram, Israel. oviedo.cs@mail.huji.ac.il.
Scientific Reports
|November 13, 2020
Summary
Diffusion noise in non-polarized nano-NMR, typically limiting spectral resolution, surprisingly enhances it in the NV-based setup. This finding overcomes a key challenge in nano-nuclear magnetic resonance (NMR) spectroscopy.
Area of Science:
- Physics
- Chemistry
- Materials Science
Background:
- Diffusion broadening of spectral lines limits frequency resolution in non-polarized liquid-state nano-NMR.
- Signal decay, typically exponential, restricts information extraction and resolution in generic sensing experiments.
Purpose of the Study:
- To investigate the impact of diffusion noise on spectral resolution in NV-based nano-NMR.
- To explore the theoretical prediction of power-law decay in signal correlations due to diffusion noise.
Main Methods:
- Utilizing a Nitrogen-Vacancy (NV) center-based nano-NMR setup.
- Analyzing signal correlations and spectral line broadening under diffusion noise conditions.
Main Results:
- Demonstrated that diffusion noise, contrary to expectations, leads to high spectral resolution in the NV-based nano-NMR system.
- Observed evidence supporting the theoretical prediction of power-law decay in signal correlations.
Conclusions:
- Diffusion noise in NV-based nano-NMR can be harnessed to achieve high spectral resolution.
- This work challenges the conventional understanding of diffusion as a solely detrimental factor in NMR spectroscopy.
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