Observation of superradiance in a phase fluctuating dipolar
Bose-Einstein condensate
- URL: http://arxiv.org/abs/2210.01586v2
- Date: Sat, 30 Dec 2023 14:55:37 GMT
- Title: Observation of superradiance in a phase fluctuating dipolar
Bose-Einstein condensate
- Authors: Bojeong Seo, Mingchen Huang, Ziting Chen, Mithilesh K. Parit, Yifei
He, Peng Chen, and Gyu-Boong Jo
- Abstract summary: We combine tunable s-wave scattering with dipolar interactions in a Bose-Einstein condensate.
We observe an asymmetric superradiant peak in a dipolar BEC by changing the direction of external magnetic field.
- Score: 2.266043047440461
- License: http://creativecommons.org/licenses/by/4.0/
- 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.
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