Quantum sensing

Degen, Christian L.; Reinhard, Friedemann; Cappellaro, Paola

doi:10.1103/revmodphys.89.035002

Cited by 2,770 publications

(2,614 citation statements)

References 374 publications

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“…For a typical nanocavity‐emitter system with Rabi splitting of 100 meV, Rabi oscillations occur at a rate of ≈40 fs. This timescale is well within the capabilities of modern ultrafast laser systems which can achieve pulse durations down to a few fs, and could be combined with TESC to allow for precise control of the emitter's state through Rabi flopping, Hahn‐echo, and more complex pulse sequences …”

Section: Discussionmentioning

confidence: 96%

Nano‐Cavity QED with Tunable Nano‐Tip Interaction

May

Fialkow

et al. 2020

Adv Quantum Tech

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Quantum state control of two‐level emitters is fundamental for many information processing, metrology, and sensing applications. However, quantum‐coherent photonic control of solid‐state emitters has traditionally been limited to cryogenic environments, which are not compatible with implementation in scalable, broadly distributed technologies. In contrast, plasmonic nano‐cavities with deep sub‐wavelength mode volumes have recently emerged as a path toward room temperature quantum control. However, optimization, control, and modeling of the cavity mode volume are still in their infancy. Here recent demonstrations of plasmonic tip‐enhanced strong coupling (TESC) with a configurable nano‐tip cavity are extended to perform a systematic experimental investigation of the cavity‐emitter interaction strength and its dependence on tip position, augmented by modeling based on both classical electrodynamics and a quasinormal mode framework. Based on this work, a perspective for nano‐cavity optics is provided as a promising tool for room temperature control of quantum coherent interactions that could spark new innovations in fields from quantum information and quantum sensing to quantum chemistry and molecular opto‐mechanics.

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Section: Discussionmentioning

confidence: 96%

Nano‐Cavity QED with Tunable Nano‐Tip Interaction

May

Fialkow

et al. 2020

Adv Quantum Tech

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“…One well-known spin defect is the nitrogen-vacancy (NV) center in diamond 5 , which may be used for applications ranging from quantum information processing 6 to quantum sensing 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Designing defect-based qubit candidates in wide-gap binary semiconductors for solid-state quantum technologies

Seo

Govoni

et al. 2017

Phys. Rev. Materials

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The development of novel quantum bits is key to extend the scope of solid-state quantum information science and technology. Using first-principles calculations, we propose that large metal ionvacancy complexes are promising qubit candidates in two binary crystals: 4H-SiC and w-AlN. In particular, we found that the formation of neutral Hf-and Zr-vacancy complexes is energetically favorable in both solids; these defects have spin-triplet ground states, with electronic structures similar to those of the diamond NV center and the SiC di-vacancy. Interestingly, they exhibit different spin-strain coupling characteristics, and the nature of heavy metal ions may allow for easy defect implantation in desired lattice locations and ensure stability against defect diffusion. In order to support future experimental identification of the proposed defects, we report predictions of their optical zero-phonon line, zero-field splitting and hyperfine parameters. The defect design concept identified here may be generalized to other binary semiconductors to facilitate the exploration of new solid-state qubits.

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“…Ongoing efforts to develop compact electrometers include the use of the electro-optic effect within solid-state crystals [14], single-electron transistors [15][16][17], and the energy shifts induced by electric fields of atom-based sensors such as trapped ions [18] or Rydberg atoms [19,20]. Recently, optically addressable electron spins in solid-state materials have played a central role in the development of quantum sensing [21,22]. Compared with atom-based approaches that require vacuum systems, these systems allow for a higher density of spins with a reduced experimental footprint, along with other promising properties such as long room-temperature coherence times and optical accessibility for spin initialization and readout [23].…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity spin-based electrometry with an ensemble of nitrogen-vacancy centers in diamond

et al. 2017

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We demonstrate a spin-based, all-dielectric electrometer based on an ensemble of nitrogen-vacancy (NV − ) defects in diamond. An applied electric field causes energy-level shifts symmetrically away from the NV − 's degenerate triplet states via the Stark effect; this symmetry provides immunity to temperature fluctuations allowing for shot-noise-limited detection. Using an ensemble of NV − s, we demonstrate shot-noise-limited sensitivities approaching 1 (V/cm)/ √ Hz under ambient conditions, at low frequencies (<10 Hz), and over a large dynamic range (20 dB). A theoretical model for the ensemble of NV − s fits well with measurements of the ground-state electric susceptibility parameter k ⊥ . Implications of spin-based, dielectric sensors for micron-scale electric-field sensing are discussed.

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Quantum sensing

Cited by 2,770 publications

References 374 publications

Nano‐Cavity QED with Tunable Nano‐Tip Interaction

Nano‐Cavity QED with Tunable Nano‐Tip Interaction

Designing defect-based qubit candidates in wide-gap binary semiconductors for solid-state quantum technologies

High-sensitivity spin-based electrometry with an ensemble of nitrogen-vacancy centers in diamond

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