Quantum sensing with a single spin

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• Liam McGuinness (Ulm)
• Wednesday 21 November 2018, 13:00-14:00
• Physics East 217.

If you have a question about this talk, please contact Dr Giovanni Barontini.

Quantum coherent sensors offer the potential of ultra-sensitive, precise and non-invasive detectors, beyond what is possible with classical sensors. They exploit quantum coherence, so as a result, they are limited by the coherence time of the sensor. Recently we have developed techniques allowing one to go beyond the sensor coherence time in order to improve the sensitivity and spectral resolution of quantum sensing. The techniques included using quantum error correction (1) and heterodyning to a classical clock (2). In this talk, new developments allowing the sensitivity, precision and information scaling of quantum metrology to be enhanced will be discussed. I will also talk about applications in nanoscale sensing and nuclear magnetic resonance, as well as the limitations that sensors constructed from single atoms pose.

1. T. Unden et al., Quantum Metrology Enhanced by Repetitive Quantum Error Correction. Phys. Rev. Lett. 116, 230502 (2016). 2. S. Schmitt et al., Submillihertz magnetic spectroscopy performed with a nanoscale quantum sensor. Science 356, 832-837 (2017).

This talk is part of the Cold atoms series.

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• Bham Talks
• Cold Atoms
• Cold atoms
• Physics East 217
• What's on in Physics?

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