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- W4302306564 abstract "Despite the extensive study of matter-wave superradiance in a Bose-Einstein condensate (BEC) using its unique coherence property, the controllability of superradiant process has remained limited in the previous studies exploiting a phase-coherent condensate with isotropic contact interactions. Here, we combine tunable s-wave scattering with dipolar interactions in a BEC of $^{168}$Er atoms wherein the asymmetry and threshold of superradiance are independently controlled. By changing the s-wave scattering length near the Feshbach resonance, we tune the superradiance threshold with increasing phase fluctuations. In contrast to collective light scattering from a condensate only with contact interactions, we observe an asymmetric superradiant peak in a dipolar BEC by changing the direction of external magnetic field. This results from the anisotropic excitation spectrum induced by the dipole-dipole interaction. Our observation is expected to bring forth unprecedented application of matter-wave optics leading to controlled emission of matter wave." @default.
- W4302306564 created "2022-10-06" @default.
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- W4302306564 date "2022-10-04" @default.
- W4302306564 modified "2023-09-26" @default.
- W4302306564 title "Observation of superradiance in a phase fluctuating dipolar Bose-Einstein condensate" @default.
- W4302306564 doi "https://doi.org/10.48550/arxiv.2210.01586" @default.
- W4302306564 hasPublicationYear "2022" @default.
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