196 citations · 1.3k across the 35 of their papers we have counts for
12 papers · 1 filter
State-selective entanglement and point-gap topology in the unidirectional Bose-Hubbard chain
Chuan-Fu Lin, Yu-Chin Tzeng, Po-Yao Chang
We study the effect of repulsive interactions on skin modes and entanglement in the unidirectional Bose--Hubbard model. Although the ground state of this integrable model undergoes…
Prethermalization and transient dynamics of the Multi-Channel Kondo systems under generic quantum quenches: Insights form Large- Schwinger-Keldysh approach
Iksu Jang, Po-Yao Chang
Understanding out-of-equilibrium many-body quantum systems is crucial in contemporary physics. However, capturing the universal dynamics of such systems remains challenging despite…
Interaction-induced Metal to Topological Insulator Transition
Yu-Chin Tzeng, Po-Yao Chang, Min-Fong Yang
By means of exact diagonalizations, the Bernevig-Hughes-Zhang model at quarter-filling in the limit of strong Hubbard on-site repulsion is investigated. We find that the non-intera…
Relating non-Hermitian and Hermitian quantum systems at criticality
Chang-Tse Hsieh, Po-Yao Chang
We demonstrate three types of transformations that establish connections between Hermitian and non-Hermitian quantum systems at criticality, which can be described by conformal fie…
Rényi entropies and negative central charges in non-Hermitian quantum systems
Yi-Ting Tu, Yu-Chin Tzeng, Po-Yao Chang
Quantum entanglement is one essential element to characterize many-body quantum systems. However, the entanglement measures are mostly discussed in Hermitian systems. Here, we prop…
Non-Abelian fracton order from gauging a mixture of subsystem and global symmetries
Yi-Ting Tu, Po-Yao Chang
We demonstrate a general gauging procedure of a pure matter theory on a lattice with a mixture of subsystem and global symmetries. This mixed symmetry can be either a semidirect pr…
Entanglement spectrum and entropy in topological non-Hermitian systems and non-unitary conformal field theories
Po-Yao Chang, Jhih-Shih You, Xueda Wen +1
We propose a method of computing and studying entanglement quantities in non-Hermitian systems by use of a biorthogonal basis. We find that the entanglement spectrum characterizes…
Parity-violating hybridization in heavy Weyl semimetals
Po-Yao Chang, Piers Coleman
We introduce a simple model to describe the formation of heavy Weyl semimetals in non-centrosymmetric heavy fermion compounds under the influence of a parity-mixing, onsite hybridi…
Skyrme insulators: insulators at the brink of superconductivity
Onur Erten, Po-Yao Chang, Piers Coleman +1
Current theories of superfluidity are based on the idea of a coherent quantum state with topologically protected, quantized circulation. When this topological protection is absent,…
Topological entanglement negativity in Chern-Simons theories
Xueda Wen, Po-Yao Chang, Shinsei Ryu
We study the topological entanglement negativity between two spatial regions in (2+1)-dimensional Chern-Simons gauge theories by using the replica trick and the surgery method. For…
Möbius Kondo Insulators
Po-Yao Chang, Onur Erten, Piers Coleman
Heavy fermion materials have recently attracted attention for their potential to combine topological protection with strongly correlated electron physics. To date, the ideas of top…
Symmetry-protected entangling boundary zero modes in crystalline topological insulators
Po-Yao Chang, Christopher Mudry, Shinsei Ryu
Crystalline topological insulators owe their topological character to the protection that certain boundary states acquire because of certain point-group symmetries. We first show t…