8.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Asia Pacific Center for Theoretical PhysicsKR600 papers
- Institute for Basic ScienceKR238 papers
- Seoul National UniversityKR166 papers
- Korea Institute for Advanced StudyKR138 papers
- Korea Advanced Institute of Science and TechnologyKR103 papers
- Pohang Accelerator Laboratory91 papers
- Rutgers, The State University of New JerseyUS74 papers
- Lawrence Berkeley National LaboratoryUS67 papers
- Yonsei UniversityKR60 papers
- Korea UniversityKR57 papers
- Pusan National UniversityKR57 papers
- Sungkyunkwan UniversityKR57 papers
82 papers · 1 filter
Frustrated superradiant phases in one- and two-dimensional lattices
Jongjun M. Lee, Myung-Joong Hwang
Understanding how frustration and symmetry breaking shape collective behavior is a central problem in quantum many-body systems. In this work, we investigate this problem in large…
Inherently unpredictable beam steering for quantum LiDAR
Junyeop Kim, Dongjin Lee, Woncheol Shin +2
Quantum LiDAR offers noise resilience and stealth observation capabilities in low-light conditions. In prior demonstrations, the telescope pointing was raster-scanned, making the o…
Pseudochaotic Many-Body Dynamics as a Pseudorandom State Generator
Wonjun Lee, Hyukjoon Kwon, Gil Young Cho
Quantum chaos is central to understanding quantum dynamics and is crucial for generating random quantum states, a key resource for quantum information tasks. In this work, we intro…
Unique entanglement time evolution of two-qubit product separable and extended Werner-like states in a discrete qubit environment
Renzo P. Alporha, Lemuel John F. Sese, Rayda P. Gammag
This study investigates the parameters affecting the entanglement time evolution of product separable (PS) and extended Werner-like (EWL) states in homogeneous, white noise, and mi…
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…
Quantum Natural Language Processing
Dominic Widdows, Willie Aboumrad, Dohun Kim +2
Language processing is at the heart of current developments in artificial intelligence, and quantum computers are becoming available at the same time. This has led to great interes…
NOON-state interference in the frequency domain
Dongjin Lee, Woncheol Shin, Sebae Park +2
The examination of entanglement across various degrees of freedom has been pivotal in augmenting our understanding of fundamental physics, extending to high dimensional quantum sta…
Efficient tensor-network simulation for the few-atom multimode Dicke model via coupling-matrix transformation
Christopher J. Ryu, Dong-Yeop Na, Weng C. Chew +1
We present a novel generalization of the chain mapping technique that applies to multi-atom, multimode systems by making use of coupling matrix transformations. This is extremely u…
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…
Numerical Framework for Modeling Quantum Electromagnetic Systems Involving Finite-Sized Lossy Dielectric Objects in Free Space
Dong-Yeop Na, Thomas E Roth, Jie Zhu +2
The modified Langevin noise formalism has been proposed for the correct charaterization of quantum electromagnetic fields in the presence of finite-sized lossy dielectric objects i…
Matrix product states and numerical mode decomposition for the analysis of gauge-invariant cavity quantum electrodynamics
Christopher J. Ryu, Dong-Yeop Na, Weng C. Chew
There has been a problem of gauge ambiguities with the Rabi Hamiltonian due to the fact that it can be derived from two formally different but physically equivalent fundamental Ham…
Simultaneous Trapping of Two Optical Pulses in an Atomic Ensemble as Stationary Light Pulses
U-Shin Kim, Yoon-Ho Kim
The stationary light pulse (SLP) refers to a zero-group-velocity optical pulse in an atomic ensemble prepared by two counter-propagating driving fields. Despite the uniqueness of a…
Ion trap with gold-plated alumina: substrate and surface characterization
Myunghun Kim, Keumhyun Kim, Jungsoo Hong +7
We describe a complete development process of a segmented-blade linear ion trap. Alumina substrate is characterized with an X-ray diffraction and loss-tangent measurement. The blad…
Trapping a Free-propagating Single-photon into an Atomic Ensemble as a Quantum Stationary Light Pulse
U-Shin Kim, Yong Sup Ihn, Chung-Hyun Lee +1
Efficient photon-photon interaction is one of the key elements for realizing quantum information processing. The interaction, however, must often be mediated through an atomic medi…
Correlation between concurrence and mutual information
Yong Kwon, Seung Ki Baek, Jaegon Um
We investigate a two-qubit system to understand the relationship between concurrence and mutual information, where the former determines the amount of quantum entanglement, whereas…
Numerical investigation of a segmented-blade ion trap with biasing rods
Jungsoo Hong, Myunghun Kim, Hyegoo Lee +1
We report a numerical study of a linear ion trap that has segmented blades and biasing rods. Our system consists of radio frequency (rf) blades, dc blades with ten separate electro…
Locking Multi-laser Frequencies to a Precision Wavelength Meter: Application to Cold Atoms
Junwoo Kim, Keumhyun Kim, Dowon Lee +6
We herein report a simultaneous frequency stabilization of two 780-nm external cavity diode lasers using a precision wavelength meter (WLM). The laser lock performance is character…
Heisenberg-limited metrology via weak-value amplification without using entangled resources
Yosep Kim, Seung-Yeun Yoo, Yoon-Ho Kim
Weak-value amplification (WVA) provides a way for amplified detection of a tiny physical signal at the expense of a lower detection probability. Despite this trade-off, due to its…
Non-LocalityQuantum Entanglement
Xingyu Guo, Chen-Te Ma
The unique entanglement measure is concurrence in a 2-qubit pure state. The maximum violation of Bell's inequality is monotonically increasing for this quantity. Therefore, people…
Quantum teleportation is a reversal of quantum measurement
Seung-Woo Lee, Dong-Gil Im, Yoon-Ho Kim +2
We introduce a generalized concept of quantum teleportation in the framework of quantum measurement and reversing operation. Our framework makes it possible to find an optimal prot…
Benchmarking quantum tomography completeness and fidelity with machine learning
Yong Siah Teo, Seongwook Shin, Hyunseok Jeong +8
We train convolutional neural networks to predict whether or not a set of measurements is informationally complete to uniquely reconstruct any given quantum state with no prior inf…
Precise and extensive characterization of an optical resonator for cavity-based quantum networks
Dowon Lee, Myunghun Kim, Jungsoo Hong +6
Cavity-based quantum node is a competitive platform for distributed quantum networks. Here, we characterize a high-finesse Fabry-Perot optical resonator for coupling single or few…
Telecom C-Band Photon-Pair Generation using Standard SMF-28 Fiber
Kyungdeuk Park, Dongjin Lee, Robert W. Boyd +1
Photon-pair generation must satisfy both the energy conservation and phase-matching conditions with a specific pump wavelength and dispersion of nonlinear optical medium, but findi…
Determining the position of a single spin relative to a metallic nanowire
J. F. da Silva Barbosa, M. Lee, P. Campagne-Ibarcq +9
The nanoscale localization of individual paramagnetic defects near an electrical circuit is an important step for realizing hybrid quantum devices with strong spin-microwave photon…