Narrow-bandwidth sensing of high-frequency fields with continuous dynamical decoupling

Abstract

State-of-the-art methods for sensing weak AC fields are only efficient in the low frequency domain (< 10 MHz). The inefficiency of sensing high frequency signals is due to the lack of ability to use dynamical decoupling. In this paper we show that dynamical decoupling can be incorporated into high frequency sensing schemes and by this we demonstrate that the high sensitivity achieved for low frequency can be extended to the whole spectrum. While our scheme is general and suitable to a variety of atomic and solid-state systems, we experimentally demonstrate it with the nitrogen-vacancy center in diamond. For a diamond with natural abundance of ${}^{13}$C we achieve coherence times up to 1.43 ms resulting in a smallest detectable magnetic field strength of 4 nT at 1.6 GHz. Attributed to the inherent nature of our scheme, we observe an additional increase in coherence time due to the signal itself.

5 pages, 4 figures

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Cited by in corpus (38)

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• Picotesla magnetometry of microwave fields with diamond sensors
• Heterodyne Sensing of Microwaves with a Quantum Sensor
• Room temperature coherent control of protected qubit in hexagonal boron nitride
• Quantum Sensing of Weak Radio-Frequency Signals by Pulsed Mollow Absorption Spectroscopy
• Initialisation of single spin dressed states using shortcuts to adiabaticity
• Broadband microwave detection using electron spins in a hybrid diamond-magnet sensor chip
• Noise spectroscopy of a quantum-classical environment with a diamond qubit
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• Low-frequency quantum sensing
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• Bloch-Siegert oscillations in the Rabi model with an amplitude-modulated driving field
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• Concatenated continuous driving of silicon qubit by amplitude and phase modulation
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