该报告于1月18号在相同地点将再举办一次

It is commonly known that the quantum ground state of a metal is characterized by a manifold in momentum space called the Fermi sea. Fermi sea can be distinguished topologically in much the same way that a bun can be distinguished from a donut by counting the number of holes. The associated topological invariant, i.e. the Euler characteristic (χ_F), serves to classify metals.

In this series of lecture, I will explain how χ_F is beyond a mathematical construct and carries important physical consequences.  In the first lecture, we will discuss topological density correlation and multipartite entanglement that reflect χ_F , which may be measurable in fermionic ultracold atomic gases. In the second lecture, we will discuss quantized transport in solid-state settings that generalize the 1D Landauer conductance. Particularly, I will introduce a quantized rectification effect in planar Josephson junctions, which captures the topology of the proximitized metal.