Narrow-bandwidth sensing of high-frequency fields with continuous dynamical decoupling
arXiv:1706.04779 · doi:10.1038/s41467-017-01159-2
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 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
References in corpus (15)
- High-sensitivity diamond magnetometer with nanoscale resolution
- Universal dynamical decoupling of a single solid-state spin from a spin bath
- Optimized Dynamical Decoupling in a Model Quantum Memory
- Fault-Tolerant Quantum Dynamical Decoupling
- Extending Quantum Coherence in Diamond
- Robust dynamical decoupling for quantum computing and quantum memory
- Dynamical Decoupling of a single electron spin at room temperature
- Single Ion Quantum Lock-In Amplifier
- Optimal Dynamical Decoherence Control of a Qubit
- Comparison of dynamical decoupling protocols for a nitrogen-vacancy center in diamond
- Local observation of antibunching in a trapped Fermi gas
- Spurious harmonic response of multipulse quantum sensing sequences
- Protecting a solid-state spin from decoherence using dressed spin states
- Multi-Qubit Gate with Trapped Ions for Microwave and Laser-Based Implementation
- Fully robust qubit in atomic and molecular three-level systems