Phase-sensitive quantum spectroscopy with high-frequency resolution

Staudenmaier, Nicolas; McGuinness, Liam P.; Jelezko, Fedor

doi:10.1103/physreva.104.l020602

Cited by 14 publications

(6 citation statements)

References 33 publications

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“…It corresponds to a phase sensitivity of 4 × 10 −3 rad/ √ Hz. In comparison, a phase sensitivity of 0.095rad/ √ Hz was previously reported by performing high frequency quantum heterodyne with NV center [29].…”

Section: Quantum Enhanced Radio Rangingmentioning

confidence: 80%

See 1 more Smart Citation

Quantum enhanced radio detection and ranging with solid spins

Chen¹,

Wang²,

Shan³

et al. 2023

Preprint

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Section: Quantum Enhanced Radio Rangingmentioning

confidence: 80%

“…And the CMOS-compatibility of diamond is favored for the development of a compact and integrated quantum sensor [46,47]. Recently, heterodyne sensing with NV center has been demonstrated for the high resolution spectroscopy of GHz radio signal [29,48,49]. It can be used to analyze the Doppler shift of RF scattering with moving objects.…”

Section: Discussionmentioning

confidence: 99%

Quantum enhanced radio detection and ranging with solid spins

Chen¹,

Wang²,

Shan³

et al. 2023

Preprint

View full text Add to dashboard Cite

“…Heterodyne readout has been used to improve the frequency resolution in nuclear magnetic resonance spectroscopy. It is also a way to achieve high precision microwave sensing [49][50][51] . High-order dynamical decoupling sequences are used to narrow the spectral linewidth by decoupling the sensor response from unwanted signal frequencies 26,27 .…”

Section: Frequency Offset Heterodyne Readoutmentioning

confidence: 99%

Quantum-assisted distortion-free audio signal sensing

et al. 2022

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Quantum sensors are known for their high sensitivity in sensing applications. However, this sensitivity often comes with severe restrictions on other parameters which are also important. Examples are that in measurements of arbitrary signals, limitation in linear dynamic range could introduce distortions in magnitude and phase of the signal. High frequency resolution is another important feature for reconstructing unknown signals. Here, we demonstrate a distortion-free quantum sensing protocol that combines a quantum phase-sensitive detection with heterodyne readout. We present theoretical and experimental investigations using nitrogen-vacancy centers in diamond, showing the capability of reconstructing audio frequency signals with an extended linear dynamic range and high frequency resolution. Melody and speech based signals are used for demonstrating the features. The methods could broaden the horizon for quantum sensors towards applications, e.g. telecommunication in challenging environment, where low-distortion measurements are required at multiple frequency bands within a limited volume.

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“…These concepts have enabled shallowly implanted NV centers to detect electron spins 21 and even nuclear spins 22,23 above the diamond surface with single-spin sensitivity. Detection protocols have also been developed allowing for nanoscale NMR [24][25][26][27] and ESR detection [28][29][30] with spectral resolution approaching that of macroscopic ESR and NMR based on inductive detection. Fluctuating electron spins of biological samples [31][32][33][34] and small groups of statistically polarized nuclear spins in a target protein 35 have been detected.…”

Section: Introductionmentioning

confidence: 99%

Detection of molecular transitions with nitrogen-vacancy centers and electron-spin labels

et al. 2022

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We present a protocol that detects molecular conformational changes with two nitroxide electron-spin labels and a nitrogen-vacancy (NV) center in diamond. More specifically, we demonstrate that the NV can detect energy shifts induced by the coupling between electron-spin labels. The protocol relies on the judicious application of microwave and radiofrequency pulses in a range of parameters that ensures stable nitroxide resonances. Furthermore, we demonstrate that our scheme is optimized by using nitroxides with distinct nitrogen isotopes. We develop a simple theoretical model that we combine with Bayesian inference techniques to demonstrate that our method enables the detection of conformational changes in ambient conditions including strong NV dephasing rates as a consequence of the diamond surface proximity and nitroxide thermalization mechanisms. Finally, we counter-intuitively show that with our method the small residual effect of random molecular tumbling becomes a resource that can be exploited to extract inter-label distances.

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Phase-sensitive quantum spectroscopy with high-frequency resolution

Cited by 14 publications

References 33 publications

Quantum enhanced radio detection and ranging with solid spins

Quantum enhanced radio detection and ranging with solid spins

Quantum-assisted distortion-free audio signal sensing

Detection of molecular transitions with nitrogen-vacancy centers and electron-spin labels

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