49 citations · 144 across the 12 of their papers we have counts for
12 papers
In-situ tuning of cavity dissipation and a topological transition in an atom-nanotip-cavity system
Taegyu Ha, Kiyanoush Goudarzi, Dowon Lee +6
We theoretically investigate a method for tuning a dissipation rate in an atom-cavity system. By inserting a nanotip into the cavity mode, we estimate that the cavity dissipation r…
Topological Switching via Exceptional Point Pairs in an Optical Microcavity Laser
Kyu-Won Park, KyeongRo Kim, Jinuk Kim +2
Conventional mode switching mechanisms, which rely on dynamically encircling exceptional points (EPs) through non-adiabatic transitions (NATs), suffer from intrinsic nonlinear dyna…
Numerical analysis of a superradiance-sideband-assisted laser with a zero frequency pulling and a narrow linewidth
Mingyu Jeon, Jinuk Kim, Kyungwon An
Numerical simulations based on the quantum Langevin equations have been performed for a large number of two-level atoms in a beam interacting with a low-Q cavity with the atomic in…
A photonic quantum engine driven by superradiance
Jinuk Kim, Seung-hoon Oh, Daeho Yang +3
Performance of nano- and micro-scale heat engines can be improved with a help from quantum mechanical phenomena. Recently, heat reservoirs with quantum coherence have been proposed…
HyperCLOVA X Technical Report
Kang Min Yoo, Jaegeun Han, Sookyo In +393
We introduce HyperCLOVA X, a family of large language models (LLMs) tailored to the Korean language and culture, along with competitive capabilities in English, math, and coding. H…
Third-order exceptional point in an ion-cavity system
Jinuk Kim, Taegyu Ha, Donggeon Kim +5
We investigate a scheme for observing the third-order exceptional point (EP3) in an ion-cavity setting. In the lambda-type level configuration, the ion is driven by a pump field, a…
Double exceptional points generated by the strong imaginary coupling of a non-Hermitian Hamiltonian in an optical microcavity
Kyu-Won Park, Jinuk Kim, Kabgyun Jeong
Exceptional points (EPs) have recently attracted considerable attention in the study of non-Hermitian systems and in applications such as sensors and mode switching. In particular,…
Behavior of Shannon entropy around an exceptional point in an open microcavity
Kyu-Won Park, Jinuk Kim, Songky Moon +1
We have investigated the Shannon entropy around an exceptional point (EP) in an open elliptical microcavity as a non-Hermitian system. The Shannon entropy had an extreme value at t…
Realization of superabsorption by time reversal of superradiance
Daeho Yang, Seung-hoon Oh, Junseok Han +5
Emission and absorption of light lie at the heart of light-matter interaction. Although emission and absorption rates are regarded as intrinsic properties of atoms and molecules, v…
Shannon entropy as an indicator of spatial resolution for morphology of mode pattern in dielectric microcavity
Kyu-Won Park, SongKy Moon, JinUk Kim
We present the Shannon entropy as an indicator of spatial resolution for morphology of resonance mode pattern in dielectric micro cavity. We obtain two types of optimized mesh poin…
The Shannon entropy and avoided crossings in closed and open quantum billiards
Kyu-Won Park, Songky Moon, Younghoon Shin +3
The relation between the Shannon entropy and avoided crossings is investigated in dielectric microcavities. The Shannon entropy of probability density for eigenfunctions in an open…
Observation of a non-equilibrium steady state of cold atoms in a moving optical lattice
Kyeong Ock Chong, Jung-Ryul Kim, Jinuk Kim +3
We investigated non-equilibrium atomic dynamics in a moving optical lattice via observation of atomic resonance fluorescence spectrum. A three-dimensional optical lattice was gener…