104 citations · 464 across the 27 of their papers we have counts for
30 papers
Characterizing universal topological phases beyond spatial embedding
Sunkyu Yu, Xianji Piao, Namkyoo Park
Although Hamiltonians govern wave-matter interactions, conventional characterizations of topological phases of matter require more than the Hamiltonian alone, relying on global inv…
Topological insulators on complex networks
Sunkyu Yu, Xianji Piao, Namkyoo Park
The landscape of topological insulators has expanded beyond its traditional domain of periodic lattices with short-range hopping. Related studies have explored topological phenomen…
Magnetic graphs for cavity quantum electrodynamics
Sunkyu Yu, Xianji Piao, Namkyoo Park
Strengthening light-matter coupling has become a central challenge in cavity quantum electrodynamics (QED), enabling ultrafast gate operations, qubit protection, and deterministic…
Mapping open quantum dynamics onto graphs
Kyuho Kim, Dayeong Lee, Seungkyun Park +3
Graph-theoretic frameworks have been widely employed in quantum physics to address the high-dimensional complexity of quantum systems. Although open quantum dynamics incorporates s…
Multi-objective design of photon blockade for bright single-photon sources
Sunkyu Yu, Xianji Piao, Namkyoo Park
High-quality single-photon sources, realized through saturable emitters, photon blockade, or heralded pair generation, are indispensable building blocks for photonic quantum platfo…
Topological heavy-tailed networks
Sunkyu Yu, Xianji Piao, Namkyoo Park
Although two-dimensional periodic structures have functioned as the primary platform for exploring topological phenomena, recent advances have substantially expanded this research…
Fully programmable slow light based on a spinor representation of generalized coupled-resonator-induced transparency
Seungkyun Park, Beomjoon Chae, Hyungchul Park +3
Electromagnetically induced transparency (EIT), arising from quantum interference in coherently driven atomic systems, has inspired a variety of photonic analogues, such as coupled…
Non-Hermitian stealthy hyperuniformity
Gitae Lee, Seungmok Youn, Ikbeom Lee +5
Symmetry-driven wave physics in open systems, exemplified by parity-time (PT) symmetry, has extended the landscape of crystalline phases in materials science to include gain-loss m…
Heavy-tailed open quantum systems reveal long-lived and ultrasensitive coherence
Sunkyu Yu, Xianji Piao, Namkyoo Park
Understanding random open quantum systems is critical for characterizing the performance of large-scale quantum devices and exploring macroscopic quantum phenomena. Various feature…
Nonlinear unitary circuits for photonic neural networks
Sunkyu Yu, Xianji Piao, Namkyoo Park
Photonics has unlocked the potential for energy-efficient acceleration of deep learning. Most approaches toward photonic deep learning have diligently reproduced traditional deep l…
Programmable photonic unitary circuits for light computing
Kyuho Kim, Kunwoo Park, Hyungchul Park +3
Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical and quantum systems. Developing platforms that perform unitary…
Programmable lattices for non-Abelian topological photonics and braiding
Gyunghun Kim, Jensen Li, Xianji Piao +2
Non-Abelian physics, originating from noncommutative sequences of operations, unveils novel topological degrees of freedom for advancing band theory and quantum computation. In pho…
Computing Riemann zeros with light scattering
Sunkyu Yu, Xianji Piao, Namkyoo Park
Finding hidden order within disorder is a common interest in material science, wave physics, and mathematics. The Riemann hypothesis, stating the locations of nontrivial zeros of t…
Programmable photonic time circuits for highly scalable universal unitaries
Xianji Piao, Sunkyu Yu, Namkyoo Park
Programmable photonic circuits (PPCs) have garnered substantial interest in achieving deep learning accelerations and universal quantum computations. Although photonic computation…
Machine learning identifies scale-free properties in disordered materials
Sunkyu Yu, Xianji Piao, Namkyoo Park
The vast amount of design freedom in disordered systems expands the parameter space for signal processing, allowing for unique signal flows that are distinguished from those in reg…
Topological protection in nonlinear optical dynamics with parity-time symmetry
Sunkyu Yu, Xianji Piao, Namkyoo Park
Topological phases exhibit properties that are conserved for continuous deformations, as demonstrated in topological protections in condensed-matter physics and electromagnetic wav…
Topological hyperbolic lattices
Sunkyu Yu, Xianji Piao, Namkyoo Park
Non-Euclidean geometry, discovered by negating Euclid's parallel postulate, has been of considerable interest in mathematics and related fields for the description of geographical…
Weak value picture on quantum observables: gauge-invariant vector potentials
Sunkyu Yu, Xianji Piao, Namkyoo Park
The conservation of physical quantities under coordinate transformations, known as gauge invariance, has been the foundation of theoretical frameworks in both quantum and classical…
Chirality in non-Hermitian photonics
Sunkyu Yu, Xianji Piao, Namkyoo Park
Chirality is ubiquitous from microscopic to macroscopic phenomena in physics and biology, such as fermionic interactions and DNA duplication. In photonics, chirality has traditiona…
Transverse spinning of light with globally unique handedness
Xianji Piao, Sunkyu Yu, Namkyoo Park
Access to the transverse spin of light has unlocked new regimes in topological photonics and optomechanics. To achieve the transverse spin of nonzero longitudinal fields, various p…
Dynamical phase diagram of parity-time symmetry with competing saturable channels
Sunkyu Yu, Xianji Piao, Namkyoo Park
Nonlinear channels play a critical role in realizing dynamical functions. Neural ionic channels and non-volatile memristors each derive representative biological and electrical fun…
Digital building blocks for controlling random waves based on supersymmetry
Sunkyu Yu, Xianji Piao, Namkyoo Park
Harnessing multimode waves allows high information capacity through modal expansions. Although passive multimode devices including waveguides, couplers, and multiplexers have been…
Target decoupling in a coupled optical system resistant to random perturbation
Sunkyu Yu, Xianji Piao, Namkyoo Park
To suppress unwanted crosstalks between nearby optical elements, the decoupling technique for integrated systems has been desired for the target control of light flows. Although cl…
Acceleration toward polarization singularity inspired by relativistic ExB drift
Sunkyu Yu, Xianji Piao, Namkyoo Park
The relativistic trajectory of a charged particle driven by the Lorentz force is different from the classical one, by velocity-dependent relativistic acceleration term. Here we sho…