"Exotic fluid dynamics in binary superfluids" Hiromitsu Takeuchi

Exotic fluid dynamics in binary superfluids
Dr. Hiromitsu Takeuchi
Lecturer, Osaka City University, Japan

• Thursday, 15 May
• 10:30-11:30
• Meeting Room C016, Lab1

Abstract:
Studies of fluid dynamics in quantum liquids and gases, has attracted much attention in low temperature physics for more than 70 years. These studies are based on the discoveries and theories of superfluid 4He, Fermi liquid and anisotropic superfluid of 3He, and Bose-Einstein condensates in ultra-cold atomic gases. In these quantum fluids, macroscopic quantum effects can cause exotic fluid dynamics, which is absent in ordinary fluids. In this talk, I present our recent studies on novel fluid dynamics in binary superfluids of two-component atomic Bose-Einstein condensates. First, I will briefly review our works on several fluid dynamics unique to this system, including quantum counterpart of Kelvin-Helmholtz instability [1], countersuperflow instability analog to thermal counterflow in superfluid 4He [2], and so on. Then, I will introduce one of my current studies on “projected spontaneous symmetry breaking” due to interface annihilation in multi-component superfluid [3]. Finally, future prospects will be discussed particular with regard to applications of these phenomena to other physical systems.

[1] H. Takeuchi, et al., Phys. Rev. B 81, 094517 (2010)
[2] H. Takeuchi, et al., Phys. Rev. Lett. 105, 205301 (2010)
[3] H. Takeuchi, et al., Phys. Rev. Lett. 109, 245301 (2012)

Looking forward to seeing many of you at the seminar.

Quantum Systems Unit