202 citations · 1.2k across the 37 of their papers we have counts for
37 papers
Landau theory of quenched criticality in linear in-context learning
Daesik Kim, Sumin Choi, Hyojae Jeon +1
In-context learning (ICL) allows a pretrained model to infer a new task from examples supplied in its prompt without updating its parameters. In linear models of ICL, the predictio…
Dynamics of skyrmions
Seungho Lee, Hyojae Jeon, Jung Hoon Han
We derive several exact results for the dynamics of CP skyrmions with arbitrary . Fractonic continuity equation is shown to hold for arbitrary CP fluid implying…
Dipolar BF theory and dipolar braiding statistics
Jung Hoon Han
We analyze the recently proposed dipolar BF theory with couplings to charge and dipole currents. The quasiparticles of the theory are either charge-like or dipole-like, and the mut…
Aspects of rank-2 gauge theory in dimensions: construction schemes, holonomies, and sublattice one-form symmetries
Yun-Tak Oh, Salvatore D. Pace, Jung Hoon Han +2
Rank-2 toric code (R2TC), a prototypical archetype of the discrete rank-2 symmetric gauge theory, has properties that differ from those of the standard toric code. Specifically, it…
Matrix Product Wave Function of the Ground State and Elementary Excitation in the Spin-1/2 Chain
Jintae Kim, Minsoo Kim, Pramod Padmanabhan +2
We present a variational matrix product state (vMPS) for the ground state of the spin-1/2 Heisenberg model. The MPS effectively organizes the various dimer configurations, in faith…
Path Integral for Spin-1 Chain in the Fluctuating Matrix Product State Basis
Jintae Kim, Rajarshi Pal, Jin-Hong Park +1
A new method of writing down the path integral for spin-1 Heisenberg antiferromagnetic chain is introduced. In place of the conventional coherent state basis that leads to the non-…
Resonating Valence Bond States with Trimer Motifs
Hyunyong Lee, Yun-tak Oh, Jung Hoon Han +1
The trimer resonating valence bond (tRVB) state consisting of an equal-weight superposition of trimer coverings on a square lattice is proposed. A model Hamiltonian of the Rokhsar-…
Classification of trivial spin-1 tensor network states on a square lattice
Hyunyong Lee, Jung Hoon Han
Classification of possible quantum spin liquid (QSL) states of interacting spin-1/2's in two dimensions has been a fascinating topic of condensed matter for decades, resulting in e…
Chirality-driven Hall Transport Phenomena of Spins
Jung Hoon Han, Hyunyong Lee
Experimental and theoretical aspects of Hall-type transport of spins in magnetic insulators are reviewed, with emphasis on their spin chirality origin. A general formalism for line…
Adiabatic Green's function technique and the transient behavior in time-dependent fermion-boson coupled models
Yun-Tak Oh, Yoichi Higashi, Ching-Kit Chan +1
The Lang-Firsov Hamiltonian, a well-known solvable model of interacting fermion-boson system with sideband features in the fermion spectral weight, is generalized to have the time-…
Formation of a Topological Monopole Lattice and its Dynamics in Three-dimensional Chiral Magnets
Seong-Gyu Yang, Ye-Hua Liu, Jung Hoon Han
Topologically protected swirl of the magnetic texture known as the Skyrmion has become ubiqui- tous in both metallic and insulating chiral magnets. Meanwhile the existence of its t…
Entanglement and corner Hamiltonian spectra of integrable open spin chains
Panjin Kim, Hosho Katsura, Nandini Trivedi +1
Entanglement spectra (ES) for the critical SU(N) (2 <= N <= 4) spin chains and other integrable models of finite length are studied with the density matrix renormalization group me…
Dynamics of magnon fluid in Dzyaloshinskii-Moriya magnet and its manifestation in magnon-Skyrmion scattering
Yun-Tak Oh, Hyunyong Lee, Jin-Hong Park +1
We construct Holstein-Primakoff Hamiltonian for magnons in arbitrary slowly varying spin background, for a microscopic spin Hamiltonian consisting of ferromagnetic spin exchange,Dz…
Thermal Hall Effect of Spins in a Paramagnet
Hyunyong Lee, Jung Hoon Han, Patrick A. Lee
Theory of Hall transport of spins in a correlated paramagnetic phase is developed. By identifying the thermal Hall current operator in the spin language, which turns out to equal t…
Zero-energy Bound States in Nodal Topological Lattice
Soo-Yong Lee, Jung Hoon Han
Nodal topological lattice is a form of magnetic crystal with topologically non-trivial spin texture, which further exhibits a periodic array of nodes with vanishing magnetization.…
Nature of Orbital and Spin Rashba Coupling in the Surface Bands of SrTiO3 and KTaO3
Panjin Kim, Kyeong Tae Kang, Jung Hoon Han
Tight-binding models for the recently observed surface electronic bands of SrTiO3 and KTaO3 are analyzed with a view to bringing out the relevance of momentum-space chiral angular…
Arbitrary Chern number generation in the three-band model from momentum space
Soo-Yong Lee, Jin-Hong Park, Gyungchoon Go +1
A simple, general rule for generating a three-band model with arbitrary Chern numbers is given. The rule is based on the idea of monopole charge-changing unitary operations and can…
Exploration of the helimagnetic and skyrmion lattice phase diagram in Cu2OSeO3 using magnetoelectric susceptibility
A. A. Omrani, J. S. White, K. Prša +6
Using SQUID magnetometry techniques, we have studied the change in magnetization versus applied ac electric field, i.e. the magnetoelectric (ME) susceptibility dM/dE, in the chiral…
Microscopic mechanism for asymmetric charge distribution in Rashba-type surface states and the origin of the the energy splitting scale
Beomyoung Kim, Panjin Kim, Wonsig Jung +9
Microscopic mechanism for the Rashba-type band splitting is examined in detail. We show how asymmetric charge distribution is formed when local orbital angular momentum (OAM) and c…
Soliton Defects in One-dimensional Topological Three-band Hamiltonian
Gyungchoon Go, Kyeong Tae Kang, Jung Hoon Han
Defect formation in the one-dimensional topological three-band model is examined within both lattice and continuum models. Classic results of Jackiw-Rebbi and Rice-Mele for the sol…
Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking
Jun Won Rhim, Jung Hoon Han
We examine Kondo effect in the periodic Anderson model for which the conduction band is of multi-orbital character and subject to mirror symmetry breaking field imposed externally.…
Three-Band Model for Quantum Hall and Spin Hall Effects
Gyungchoon Go, Jin-Hong Park, Jung Hoon Han
Topological properties of a certain class of spinless three-band Hamiltonians are shown to be summed up by the Skyrmion number in momentum space, analogous to the case of two-band…
Orbital Dzyaloshinskii-Moriya Exchange Interaction
Panjin Kim, Jung Hoon Han
Superexchange calculation is performed for multi-orbital band models with broken inversion symmetry. Orbital-changing hopping terms allowed by the symmetry breaking electric field…
Skyrmion Generation by Current
Youngbin Tchoe, Jung Hoon Han
Skyrmions, once a hypothesized field-theoretical object believed to describe the nature of elementary particles, became common sightings in recent years among several non-centrosym…