361 citations · 1.6k across the 33 of their papers we have counts for
4 papers · 1 filter
Sparse polynomial equations and other enumerative problems whose Galois groups are wreath products
Alexander Esterov, Lionel Lang
We introduce a new technique to prove connectivity of subsets of covering spaces (so called inductive connectivity), and apply it to Galois theory of problems of enumerative geomet…
Effects of Non-Hermiticity on Su-Schrieffer-Heeger Defect States
Li-Jun Lang, You Wang, Hailong Wang +1
We study the emergence and disappearance of defect states in the complex Su-Schrieffer-Heeger (cSSH) model, a non-Hermitian one-dimensional lattice model containing gain and loss o…
Topologically Enhanced Harmonic Generation in a Nonlinear Transmission Line Metamaterial
You Wang, Li-Jun Lang, Ching Hua Lee +2
Nonlinear transmission lines (NLTLs) are nonlinear electronic circuits commonly used for parametric amplification and pulse generation. It has previously been shown that harmonic g…
Non-Hermitian dynamics of slowly-varying Hamiltonians
Hailong Wang, Li-Jun Lang, Y. D. Chong
We develop a theoretical description of non-Hermitian time evolution that accounts for the break- down of the adiabatic theorem. We obtain closed-form expressions for the time-depe…