Abstract
AbstractIn this chapter, we experimentally demonstrate that the geometric phase can also emerge in a macroscopic thermal convection-conduction system. Following Li et al. [Science 364, 170–173 (2019)], we study two moving rings with equal-but-opposite velocities, joined together by a stationary intermediate layer. We first confirm an exceptional point of velocity that separates a stationary temperature profile and a moving one. We then investigate a cyclic path of time-varying velocity containing the exceptional point, and an extra phase difference of $$\pi $$
π
appears (say, the geometric phase). These results broaden the scope of the geometric phase and provide insights into the thermal topology.
Publisher
Springer Nature Singapore
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