Shijie Chai
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View article: Torque Ripple Reduction in Switched Reluctance Machines Considering Phase Torque-Generation Capability
Torque Ripple Reduction in Switched Reluctance Machines Considering Phase Torque-Generation Capability Open
In this paper, an improved online torque compensation strategy considering phase torque-generation capability is proposed to enhance the conventional torque-sharing function (TSF), thus reducing torque ripple for switched reluctance machin…
View article: Enhancing fiber atom interferometer by in-fiber laser cooling
Enhancing fiber atom interferometer by in-fiber laser cooling Open
We demonstrate an inertia sensitive atom interferometer optically guided
\ninside a 22-cm-long negative curvature hollow-core photonic crystal fiber with
\nan interferometer time of 20 ms. The result prolongs the previous fiber guided
\nat…
View article: Contrasting Effects of Nitrogen Addition on Vegetative Phenology in Dry and Wet Years in a Temperate Steppe on the Mongolian Plateau
Contrasting Effects of Nitrogen Addition on Vegetative Phenology in Dry and Wet Years in a Temperate Steppe on the Mongolian Plateau Open
Changes in spring and autumn phenology and thus growing season length (GSL) pose great challenges in accurately predicting terrestrial primary productivity. However, how spring and autumn phenology in response to land-use change and nitrog…
View article: Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method
Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method Open
Spectroradiometers exhibit the smallest aberration and the optimum response at the field-of-view (FOV) center. The aberration increases and the response deteriorates at positions further away from the FOV center, which leads to nonuniformi…
View article: Dark-state sideband cooling in an atomic ensemble
Dark-state sideband cooling in an atomic ensemble Open
We utilize the dark state in a ∧-type three-level system to cool an ensemble of ⁸⁵Rb atoms in an optical lattice [Morigi et al., Phys. Rev. Lett. 85, 4458 (2000)]. The common suppression of the carrier transition of atoms with different vi…
View article: Large array of Schrödinger cat states facilitated by an optical waveguide
Large array of Schrödinger cat states facilitated by an optical waveguide Open
View article: Enhancing survival resonances with engineered dissipation
Enhancing survival resonances with engineered dissipation Open
We investigate a scheme that enhances survival resonances in a δ-killed system through actively recycling lost atoms. The process causes atoms to dissipate into superpositions of momentum states with sustained survival when exposed to kick…
View article: Loading Dynamics of Cold Atoms into a Hollow-Core Photonic Crystal Fiber
Loading Dynamics of Cold Atoms into a Hollow-Core Photonic Crystal Fiber Open
Cold atoms trapped and guided in hollow-core photonic crystal fibers provide a scalable diffraction-free setting for atom–light interactions for quantum technologies. However, due to the mismatch of the depth and spatial extension of the t…
View article: Measuring The Gravitational Field with an Atomic Ruler
Measuring The Gravitational Field with an Atomic Ruler Open
This thesis presents the experimental and theoretical studies of the survival resonances in a dissipative atom-optics system, and their applications. We demonstrate this resonant phenomenon by using an alternative approach to the standard …
View article: Measuring the local gravitational field using survival resonances in a dissipatively driven atom-optics system
Measuring the local gravitational field using survival resonances in a dissipatively driven atom-optics system Open
We do a proof-of-principle demonstration of an atomic gravimeter based on survival resonances of dissipatively driven atoms. Exposing laser-cooled atoms to a sequence of near-resonant standing-wave light pulses reveals survival resonances …
View article: Survival resonances in an atom-optics system driven by temporally and spatially periodic dissipation
Survival resonances in an atom-optics system driven by temporally and spatially periodic dissipation Open
We investigate laser-cooled atoms periodically driven by pulsed standing waves of light tuned close to an open atomic transition. This nonunitary system displays survival resonances for certain driving frequencies. The survival resonances …
View article: Resonant transfer of large momenta from finite-duration pulse sequences
Resonant transfer of large momenta from finite-duration pulse sequences Open
We experimentally investigate the atom optics kicked particle at quantum resonance using finite duration kicks. Even though the underlying process is quantum interference, it can be well described by an
\nε
\n-pseudoclassical model. The
…