Two-Photon Interface of Nuclear Spins Based on the Optonuclear Quadrupolar Effect

Xu, Haowei; Li, Changhao; Wang, Guoqing; Wang, Hua; Tang, Hao; Barr, Ariel Rebekah; Cappellaro, Paola; Li, Ju

doi:10.1103/physrevx.13.011017

Cited by 6 publications

(8 citation statements)

References 113 publications

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“…Note added in proof: While this paper was under review, we became aware of related work observing QAH states at n ¼ À1 as well as fractional QAH states in twisted bilayer MoTe 2 (48)(49)(50)(51).…”

Section: Discussion and Outlookmentioning

confidence: 99%

Mapping twist-tuned multiband topology in bilayer WSe ₂

Foutty,

Kometter,

Devakul

et al. 2024

Science

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Semiconductor moiré superlattices have been shown to host a wide array of interaction-driven ground states. However, twisted homobilayers have been difficult to study in the limit of large moiré wavelengths, where interactions are most dominant. In this study, we conducted local electronic compressibility measurements of twisted bilayer WSe 2 (tWSe 2 ) at small twist angles. We demonstrated multiple topological bands that host a series of Chern insulators at zero magnetic field near a “magic angle” around 1.23°. Using a locally applied electric field, we induced a topological quantum-phase transition at one hole per moiré unit cell. Our work establishes the topological phase diagram of a generalized Kane-Mele-Hubbard model in tWSe 2 , demonstrating a tunable platform for strongly correlated topological phases.

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Section: Discussion and Outlookmentioning

confidence: 99%

Mapping twist-tuned multiband topology in bilayer WSe ₂

Foutty,

Kometter,

Devakul

et al. 2024

Science

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“…Acousto-and electro-optic modulators can provide shifts up to a few GHz but they normally operate in the infrared and produce parasitic sidebands. [34] Nonlinear 𝜒 (2) and 𝜒 (3) mixing processes can achieve efficient and tunable frequency conversion but requires strict phase-matching between the interacting waves, precise angular control of the optical components, and have a strong nonlinear dependence on optical power. Here, diamond Raman lasers provide the advantage of being accurately tuned by using temperature exclusively thanks to the outstanding thermal and thermooptic properties of the material, in combination with the temperature dependence of the Raman shift.…”

Section: Integrated Tunable Diamond Raman Lasersmentioning

confidence: 99%

“…Deep knowledge of the forces and interactions inside nuclei is the basis for understanding and controlling atomic processes in a wide range of application areas, including atomic clocks, [1,2] quantum computing, [3,4] or nuclear spectroscopy. [5] A gateway to access this information is through the interplay between the electronic and nuclear structure of atoms that is, hyperfine DOI: 10.1002/lpor.202300564 interactions.…”

Section: Introductionmentioning

confidence: 99%

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

Granados,

Stoikos,

Bernerd

et al. 2023

Laser & Photonics Reviews

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Tunable single‐frequency lasers are the most prominent tool for high‐resolution spectroscopy, allowing for the study and exploitation of the electronic structure of atoms. A significant milestone relies on the demonstration of integrated laser technology for performing such a task. The device presented here is composed of a compact Fabry–Perot monolithic resonator capable of producing tunable and Fourier‐limited nanosecond pulses with a MHz‐class frequency stability without active cavity stabilization elements. It also has the remarkable capability of exploiting the Raman effect to funnel efficiently the broad spectrum of an input laser to a spectrally‐bright Stokes pulse at hard‐to‐access wavelength ranges. The targeted atom for the demonstrations is 152Sm, released as an atomic vapor in a hot cavity environment. Here, the Stokes field is tuned to a wavelength of 433.9 nm, while a crossed‐beams spectroscopy setup is used to minimize the Doppler broadened spectral features of the atoms. With this work, the suitability of integrated diamond Raman lasers as a high‐resolution in‐source spectroscopy tool is demonstrated, enabling many applications in atomic and nuclear physics. The integrated form‐factor and inherent simplicity makes such a laser an interesting prospect for quantum‐technology based sensing systems and related applications.

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“…Although the Berry curvatures of the Haldane model have been demonstrated in a cold-atom experiment (2), the quantum anomalous Hall effect (QAHE) as the most prominent macroscopic signature of the Haldane model could not be measured there. In solid-state systems, the QAHE has been observed in two categories of materials (3): (i) magnetic topological insulators such as Cr-or V-doped (Bi,Sb) 2 Te 3 (4-6) and intrinsic MnBi 2 Te 4 (7), in which the time-reversal symmetry is broken by the ordering of magnetic elements and the Berry curvatures of the two G valleys of opposite surfaces add up to a Chern number of 1; and (ii) two-dimensional (2D) materials with moiré superlattice at nonzero charge densities that correspond to odd filling factors, in which the time-reversal symmetry is broken spontaneously by the exchange interactions, and the Chern number arises from a single principal valley (8)(9)(10)(11)(12)(13)(14). Without stacking multiple (effectively decoupled) periods of molecular-beam-epitaxy (MBE)-grown quantum wells in the vertical direction (15), the largest Chern number that has been realized so far is 2 in ferromagnetic systems that were not fully quantized at zero magnetic field (16,17).…”

mentioning

confidence: 99%

Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene

Han,

Lu,

Yao

et al. 2024

Science

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The quantum anomalous Hall effect (QAHE) is a robust topological phenomenon that features quantized Hall resistance at zero magnetic field. We report the QAHE in a rhombohedral pentalayer graphene-monolayer tungsten disulfide (WS 2 ) heterostructure. Distinct from other experimentally confirmed QAHE systems, this system has neither magnetic element nor moiré superlattice effect. The QAH states emerge at charge neutrality and feature Chern numbers C = ±5 at temperatures of up to about 1.5 kelvin. This large QAHE arises from the synergy of the electron correlation in intrinsic flat bands of pentalayer graphene, the gate-tuning effect, and the proximity-induced Ising spin-orbit coupling. Our experiment demonstrates the potential of crystalline two-dimensional materials for intertwined electron correlation and band topology physics and may enable a route for engineering chiral Majorana edge states.

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Two-Photon Interface of Nuclear Spins Based on the Optonuclear Quadrupolar Effect

Cited by 6 publications

References 113 publications

Mapping twist-tuned multiband topology in bilayer WSe ₂

Mapping twist-tuned multiband topology in bilayer WSe ₂

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene

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Two-Photon Interface of Nuclear Spins Based on the Optonuclear Quadrupolar Effect

Cited by 6 publications

References 113 publications

Mapping twist-tuned multiband topology in bilayer WSe 2

Mapping twist-tuned multiband topology in bilayer WSe 2

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene

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Product

Resources

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Mapping twist-tuned multiband topology in bilayer WSe ₂

Mapping twist-tuned multiband topology in bilayer WSe ₂