Hoạt động khoa học
Seminar
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Seminar Trung tâm Vật lý lý thuyết: | |
| Tên báo cáo | Controlling and Probing non-Abelian Emergent Gauge Potentials in Spinor Bose-Fermi Mixtures |
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| Người trình bày | TS. Nguyễn Thanh Phúc |
| Cơ quan | RIKEN CEMS |
| Ngày | Thứ Hai, 29-02-2016 |
| Giờ | 10:00 AM |
| Địa điểm | Phòng 202 (Thư viện), Viện Vật lý, 10 Đào Tấn, Ba Đình, Hà Nội |
| Tóm tắt | Gauge fields, typified by the electromagnetic field, often appear as emergent phenomena due to geometrical properties of a curved Hilbert subspace, and provide a key mechanism for understanding such exotic phenomena as the anomalous and topological Hall effects. Non-abelian gauge potentials serve as a source of non-singular magnetic monopoles. Here we show that unlike conventional solid materials, the non-abelianness of emergent gauge potentials in spinor Bose-Fermi atomic mixtures can be continuously varied by changing the relative particle-number densities of bosons and fermions [1]. The non-abelian feature is captured by an explicit dependence of the measurable spin current density of fermions in the mixture on the variable coupling constant. Spinor mixtures also provide us with a method to coherently and spontaneously generate a pure spin current without relying on the spin Hall effect. Such a spin current is expected to have potential applications in the new generation ofatomtronic devices. [1] Nguyen Thanh Phuc et al., Nat. Com. 6, 8135 (2015). |
| Người chủ trì | Hoàng Anh Tuấn |