Congratulations to Yiqing Zhang and Liangjun He for their paper published on PRL!
- 发布时间：
- 2026-07-31
- 文章标题：
- Congratulations to Yiqing Zhang and Liangjun He for their paper published on PRL!
- 内容：
-
One of the key ingredients for realizing rich many-body phenomena is the interaction between particles. The most common type is the pairwise two-body interaction. Beyond these, particles can also exhibit higher-order multi-body interactions, which can give rise to novel collective behaviors that go beyond what is possible with only two-body interactions. However, in most physical systems, three-body and higher-order effects are often negligibly small and overshadowed by the dominant two-body interactions.
In this work, we propose an experimentally feasible scheme in which optical feedback, generated by two reflecting mirrors, induces an effective three-body interaction in Bose-Einstein condensates. Notably, in this setup, the two-body interactions can be completely tuned to vanish, enabling the exploration of pure three-body effects. The induced three-body interaction exhibits unique long-range and nonreciprocal properties. As a result, the condensate displays remarkable stationary and dynamical behaviors, including self-organization into stable droplet clusters and self-acceleration dynamics that seemingly violate Newton’s laws of motion.
This scheme integrates several aspects of particle-particle interactions—namely long-range, multi-body, and nonreciprocal interactions—within a straightforward optical feedback system. It offers a promising platform for investigating exotic phenomena associated with multi-body interactions in quantum gases.
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