dorsal/arxiv
View SchemaBaseband Detection of Bistatic Electron Spin Signals in Magnetic Resonance Force Microscopy (MRFM)
| Authors | Chun-yu Yip, Alfred O. Hero, Daniel Rugar, Jeffrey A. Fessler |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307042 |
| URL | https://arxiv.org/abs/quant-ph/0307042 |
Abstract
In single spin Magnetic Resonance Force Microscopy (MRFM), the objective is to detect the presence of an electron (or nuclear) spin in a sample volume by measuring spin-induced attonewton forces using a micromachined cantilever. In the OSCAR method of single spin MRFM, the spins are manipulated by an external rf field to produce small periodic deviations in the resonant frequency of the cantilever. These deviations can be detected by frequency demodulation followed by conventional amplitude or energy detection. In this paper, we present an alternative to these detection methods, based on optimal detection theory and Gibbs sampling. On the basis of simulations, we show that our detector outperforms the conventional amplitude and energy detectors for realistic MRFM operating conditions. For example, to achieve a 10% false alarm rate and an 80% correct detection rate our detector has an 8 dB SNR advantage as compared with the conventional amplitude or energy detectors. Furthermore, at these detection rates it comes within 4 dB of the omniscient matched-filter lower bound.
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"abstract": "In single spin Magnetic Resonance Force Microscopy (MRFM), the objective is\nto detect the presence of an electron (or nuclear) spin in a sample volume by\nmeasuring spin-induced attonewton forces using a micromachined cantilever. In\nthe OSCAR method of single spin MRFM, the spins are manipulated by an external\nrf field to produce small periodic deviations in the resonant frequency of the\ncantilever. These deviations can be detected by frequency demodulation followed\nby conventional amplitude or energy detection. In this paper, we present an\nalternative to these detection methods, based on optimal detection theory and\nGibbs sampling. On the basis of simulations, we show that our detector\noutperforms the conventional amplitude and energy detectors for realistic MRFM\noperating conditions. For example, to achieve a 10% false alarm rate and an 80%\ncorrect detection rate our detector has an 8 dB SNR advantage as compared with\nthe conventional amplitude or energy detectors. Furthermore, at these detection\nrates it comes within 4 dB of the omniscient matched-filter lower bound.",
"arxiv_id": "quant-ph/0307042",
"authors": [
"Chun-yu Yip",
"Alfred O. Hero",
"Daniel Rugar",
"Jeffrey A. Fessler"
],
"categories": [
"quant-ph"
],
"title": "Baseband Detection of Bistatic Electron Spin Signals in Magnetic Resonance Force Microscopy (MRFM)",
"url": "https://arxiv.org/abs/quant-ph/0307042"
},
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