Hoạt động
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Seminar
| Seminar Vật lý lý thuyết và Vật lý tính toán:
| | 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
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| Cơ quan | RIKEN CEMS
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| Ngày | Thứ Hai, 29-02-2016
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| Giờ | 10:00 AM
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| Địa điểm | Phòng 202 (Thư viện), Viện Vật lý, 10 Đào Tấn, Ba Đình, Hà Nội
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| 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).
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| Người chủ trì | Hoàng Anh Tuấn
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