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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

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Published on: June 9, 2016

Composite-pulse magnetometry with a solid-state quantum sensor.

Clarice D Aiello¹, Masashi Hirose, Paola Cappellaro

¹Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.

Nature Communications

|January 31, 2013

Summary

This summary is machine-generated.

New composite pulse techniques enhance quantum magnetometer sensitivity by mitigating control errors and decoherence. This method offers a flexible approach for sensing static or periodic fields, even in challenging environments.

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Area of Science:

Quantum sensing
Solid-state physics
Magnetometry

Background:

Quantum magnetometer sensitivity is limited by control errors and short coherence times, especially in solid-state systems.
Existing refocusing techniques improve sensitivity to periodic fields but reduce bandwidth and cannot sense static fields.

Purpose of the Study:

To demonstrate a flexible magnetometry scheme using continuous driving with a composite pulse (rotary-echo).
To mitigate driving power imperfections and decoherence for improved quantum sensing.

Main Methods:

Experimental demonstration of continuous sensor spin driving using a rotary-echo composite pulse.
Implementation in a room-temperature system utilizing a single electronic spin in diamond.
Tunable parameter selection to compensate for varying noise conditions.

Main Results:

Achieved a tunable trade-off between sensitivity (μTHz(-1/2) range) and coherence times (approaching T(1)).
Demonstrated mitigation of driving power imperfections and decoherence.
Sensitivity comparable to traditional Ramsey spectroscopy.

Conclusions:

Composite-pulse magnetometry offers a flexible and robust method for quantum sensing.
The technique is applicable to nanoscale sensing in diverse environments and noise spectroscopy.
Enables improved performance by balancing sensitivity and coherence time.