Exploring the Berezinskii-Kosterlitz-Thouless Transition in a Two-dimensional Dipolar Bose Gas
arxiv(2024)
摘要
Long-range and anisotropic dipolar interactions induce complex order in
quantum systems. It becomes particularly interesting in two-dimension (2D),
where the superfluidity with quasi-long-range order emerges via
Berezinskii-Kosterlitz-Thouless (BKT) mechanism, which still remains elusive
with dipolar interactions. Here, we observe the BKT transition from a normal
gas to the superfluid phase in a quasi-2D dipolar Bose gas of erbium atoms.
Controlling the orientation of dipoles, we characterize the transition point by
monitoring extended coherence and measuring the equation of state. This allows
us to gain a systematic understanding of the BKT transition based on an
effective short-range description of dipolar interaction in 2D. Additionally,
we observe anisotropic density fluctuations and non-local effects in the
superfluid regime, which establishes the dipolar nature of the 2D superfluid.
Our results lay the ground for understanding the behavior of dipolar bosons in
2D and open up opportunities for examining complex orders in a dipolar
superfluid.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要