Non-hermitian physics

Y Ashida, Z Gong, M Ueda - Advances in Physics, 2020 - Taylor & Francis
A review is given on the foundations and applications of non-Hermitian classical and
quantum physics. First, key theorems and central concepts in non-Hermitian linear algebra …

Topological physics of non-Hermitian optics and photonics: a review

H Wang, X Zhang, J Hua, D Lei, M Lu, Y Chen - Journal of Optics, 2021 - iopscience.iop.org
The notion of non-Hermitian optics and photonics rooted in quantum mechanics and
photonic systems has recently attracted considerable attention ushering in tremendous …

Topological phases of non-Hermitian systems

Z Gong, Y Ashida, K Kawabata, K Takasan… - Physical Review X, 2018 - APS
While Hermiticity lies at the heart of quantum mechanics, recent experimental advances in
controlling dissipation have brought about unprecedented flexibility in engineering non …

Measurement-induced dark state phase transitions in long-ranged fermion systems

T Müller, S Diehl, M Buchhold - Physical Review Letters, 2022 - APS
We identify an unconventional algebraic scaling phase in the quantum dynamics of long-
range hop**, free fermions, which are exposed to continuous local measurements. The …

Symmetry-protected exceptional rings in two-dimensional correlated systems with chiral symmetry

T Yoshida, R Peters, N Kawakami, Y Hatsugai - Physical Review B, 2019 - APS
Emergence of exceptional points in two dimensions is one of the remarkable phenomena in
non-Hermitian systems. We here elucidate the impacts of symmetry on the non-Hermitian …

Theory of non-Hermitian fermionic superfluidity with a complex-valued interaction

K Yamamoto, M Nakagawa, K Adachi, K Takasan… - Physical review …, 2019 - APS
Motivated by recent experimental advances in ultracold atoms, we analyze a non-Hermitian
(NH) BCS Hamiltonian with a complex-valued interaction arising from inelastic scattering …

Quantum electrodynamic control of matter: Cavity-enhanced ferroelectric phase transition

Y Ashida, A İmamoğlu, J Faist, D Jaksch, A Cavalleri… - Physical Review X, 2020 - APS
The light-matter interaction can be utilized to qualitatively alter physical properties of
materials. Recent theoretical and experimental studies have explored this possibility of …

Parity-time-symmetric quantum critical phenomena

Y Ashida, S Furukawa, M Ueda - Nature communications, 2017 - nature.com
Synthetic non-conservative systems with parity-time (PT) symmetric gain–loss structures can
exhibit unusual spontaneous symmetry breaking that accompanies spectral singularity …

Anomalous helical edge states in a non-Hermitian Chern insulator

K Kawabata, K Shiozaki, M Ueda - Physical Review B, 2018 - APS
A non-Hermitian extension of a Chern insulator and its bulk-boundary correspondence are
investigated. It is shown that in addition to the robust chiral edge states that reflect the …

Non-hermitian mott skin effect

T Yoshida, SB Zhang, T Neupert, N Kawakami - Physical Review Letters, 2024 - APS
We propose a novel type of skin effects in non-Hermitian quantum many-body systems that
we dub a “non-Hermitian Mott skin effect.” This phenomenon is induced by the interplay …