Nonclassical light at exceptional points of a quantum -symmetric two-mode system

J Peřina Jr, A Lukš, JK Kalaga, W Leoński… - Physical Review A, 2019 - APS
A two-mode optical parity-time (PT) symmetric system, with gain and damping, described by
a quantum quadratic Hamiltonian with additional small Kerr-like nonlinear terms, is analyzed …

Revisit the Poynting vector in P T-symmetric coupled waveguides

XZ Zhang, RZ Luo, J Chen - Optics Express, 2022 - opg.optica.org
We show that the time-averaged Poynting vector of S?= E?× H?^∗/2 in parity-time (PT)
symmetric coupled waveguides is always positive and cannot explain the stopped light at …

Unidirectional invisibility in PT-symmetric cantor photonic crystals

M Wu, F Liu, D Zhao, Y Wang - Crystals, 2022 - mdpi.com
In this paper, we investigate the nonreciprocity of reflection in parity-time− symmetric (PT-
symmetric) Cantor photonic crystals (PCs). Two one-dimensional PCs abiding by the Cantor …

Quantum interference in anti-parity-time symmetric coupled waveguide system

Y Qin, H Chen, D Luo, C Pan, H Hu, Y Zhang… - Optics Express, 2021 - opg.optica.org
We theoretically demonstrate quantum interference in an anti-parity-time (anti-PT) symmetric
system based on coupled waveguides. We calculate the coincidence probability in an input …

Unavoidability of nonclassicality loss in -symmetric systems

J Peřina Jr, A Miranowicz, JK Kalaga, W Leoński - Physical Review A, 2023 - APS
We show that the loss of nonclassicality (including quantum entanglement) cannot be
compensated by the (incoherent) amplification of PT-symmetric systems. We address this …

Topological phases and non-Hermitian topology in tunable nonreciprocal cyclic three-mode optical systems

YWY Li, XF Nie, J Cao, WX Cui, HF Wang - Optics Express, 2024 - opg.optica.org
We propose a method for simulating a 1D non-Hermitian Su-Schrieffer-Heeger model with
modulated nonreciprocal hopping using a cyclic three-mode optical system. The current …

[HTML][HTML] Singular transmission properties of electromagnetic waves in one-dimensional PT-symmetric triangular optical waveguide networks

Y Lin, X Yang, R Zhang, C Huang, D Deng, H Liu… - Results in Physics, 2024 - Elsevier
In this paper, the singular transmission properties of electromagnetic waves in one-
dimensional PT-symmetric triangular finite periodic optical waveguide networks are …

Quantum behavior of a PT-symmetric two-mode system with cross-Kerr nonlinearity

J Peřina Jr, A Lukš - Symmetry, 2019 - mdpi.com
Quantum behavior of two oscillator modes, with mutually balanced gain and loss and
coupled via linear coupling (including energy conserving as well as energy non-conserving …

1× 2 switchable dual-mode optical 90 hybrid device based on thermo-optic phase shifters and 2× 2 MMI couplers on SOI platform

DH Ta, HDN Thi, TTT Thi, KN Do Hoang… - IEEE Photonics …, 2021 - ieeexplore.ieee.org
This paper designs a 1× 2 switchable dual-mode optical 90° hybrid device on the silicon-on-
insulator (SOI) platform for the mode division multiplexing hybridized coherent transmission …

Multiple quantum exceptional, diabolical, and hybrid points in multimode bosonic systems: I. Inherited and genuine singularities

K Thapliyal, J Peřina Jr, G Chimczak… - arXiv preprint arXiv …, 2024 - arxiv.org
The existence and degeneracies of quantum exceptional, diabolical, and hybrid (ie,
diabolically degenerated exceptional) singularities of simple bosonic systems composed of …