Elastic collision time of the Rydberg-state dipole-dipole interaction
Meng-Cheng Xie1*, Bongjune Kim1, Ite A. Yu1,2
1Physics, National Tsing Hua University, Hsinchu, Taiwan
2Center for Quantum Science and Technology, National Tsing Hua University, Hsinchu, Taiwan
* Presenter:Meng-Cheng Xie, email:jjes40511@gmail.com
Currently, there are only two types of Bose-Einstein Condensates (BECs): atomic BECs and exciton-polariton BECs, each exhibiting distinct characteristics. The lifetime of atomic BECs can exceed 1 ms, but they require temperatures below 1 μK and have weak interactions. The temperature of the exciton-polaron BEC can be higher than 1 K, but the lifetime is shorter than 100 ps and has the limitation of a two-dimensional system. Our experiment has realized a new type of quasiparticle that can be used to achieve BEC: the dark-state polariton with dipole-dipole interactions (DDI). Compared to exciton-polariton BECs, which are limited to two-dimensional systems and have a lifetime of less than 100 ps, the stationary dark-state polariton BEC is a three-dimensional system with a lifetime exceeding 1 μs. Additionally, while atomic BECs require temperatures below 1 μK and exhibit weak interactions, the stationary dark-state polariton BEC can exist at temperatures above 1 mK and has strong interactions.


Keywords: Bose-Einstein Condensates, dipole-dipole interactions