Circuit realization of topological physics

H Yang, L Song, Y Cao, P Yan - Physics Reports, 2024 - Elsevier
Recently, topolectrical circuits (TECs) boom in studying the topological states of matter. The
resemblance between circuit Laplacians and tight-binding models in condensed matter …

Universal platform of point-gap topological phases from topological materials

D Nakamura, K Inaka, N Okuma, M Sato - Physical Review Letters, 2023 - APS
Whereas point-gap topological phases are responsible for exceptional phenomena intrinsic
to non-Hermitian systems, their realization in quantum materials is still elusive. Here, we …

Effective impurity behavior emergent from non-Hermitian proximity effect

D Wu, J Chen, W Su, R Wang, B Wang… - Communications …, 2023 - nature.com
Non-Hermitian boundaries commonly take place in many open quantum systems locally
coupled to a surrounding environment. Here, we reveal a type of non-Hermitian effect …

Quantum metric unveils defect freezing in non-Hermitian systems

K Sim, N Defenu, P Molignini, R Chitra - Physical Review Letters, 2023 - APS
Non-Hermiticity in quantum Hamiltonians leads to nonunitary time evolution and possibly
complex energy eigenvalues, which can lead to a rich phenomenology with no Hermitian …

Exotic quantum light-matter interactions in bilayer square lattices

XL Dong, PB Li, JQ Chen, FL Li, F Nori - Physical Review B, 2023 - APS
We investigate quantum emitters (QEs) interacting with a photonic structured bath made of
bilayer square lattices, where the resonance anticrossing between the energy bands opens …

Quantum theory of non-hermitian optical binding between nanoparticles

H Rudolph, U Delić, K Hornberger, BA Stickler - Physical Review A, 2024 - APS
Recent experiments demonstrate highly tunable nonreciprocal coupling between levitated
nanoparticles due to optical binding [J. Rieser, Science 377, 987 (2022) 0036-8075 …

Infernal and exceptional edge modes: non-Hermitian topology beyond the skin effect

MM Denner, T Neupert, F Schindler - Journal of Physics …, 2023 - iopscience.iop.org
The classification of point gap topology in all local non-Hermitian (NH) symmetry classes
has been recently established. However, many entries in the resulting periodic table have …

Topological phases of many-body non-Hermitian systems

K Cao, SP Kou - Physical Review B, 2024 - APS
We show that many-body fermionic non-Hermitian systems require two distinct sets of
topological invariants to describe the topology of energy bands and quantum states …

Simulating open quantum systems with giant atoms

G Chen, AF Kockum - Quantum Science and Technology, 2024 - iopscience.iop.org
Open quantum many-body systems are of both fundamental and applicational interest.
However, it remains an open challenge to simulate and solve such systems, both with state …