86 citations · 586 across the 33 of their papers we have counts for
33 papers
Coherent-disorder-driven complexity transitions in a quantum-advantage architecture
Sung-Bin B. Lee, Chae-Yeun Park, Changhun Oh +1
While decoherence is known to erode classical hardness in quantum random sampling, the impact of coherent spatial disorder remains an open question. We study a square-lattice insta…
Spin-Valley Anderson Impurity for Moiré Systems: Fermi Liquid, Pairing, and Pseudogap
Yi-Jie Wang, Geng-Dong Zhou, Hyunsung Jung +3
Recent experiments support that the magic-angle graphene can be modeled by a periodic array of correlated quantum impurities, immersed in a Dirac sea. This work analytically tackle…
The finite-difference parquet method: Enhanced electron-paramagnon scattering opens a pseudogap
Jae-Mo Lihm, Dominik Kiese, Seung-Sup B. Lee +1
We present the finite-difference parquet method that greatly improves the applicability and accuracy of two-particle correlation approaches to interacting electron systems. This me…
Scalable projected entangled-pair state representation of random quantum circuit states
Sung-Bin B. Lee, Hee Ryang Choi, Daniel Donghyon Ohm +1
Classical simulation of a programmable quantum processor is crucial in identifying the threshold of a quantum advantage. We demonstrate the simple update of projected entangled-pai…
Dynamical scaling and Planckian dissipation due to heavy-fermion quantum criticality
Andreas Gleis, Seung-Sup B. Lee, Gabriel Kotliar +1
We study dynamical scaling associated with a Kondo-breakdown quantum critical point (KB-QCP) of the periodic Anderson model, treated by two-site cellular dynamical mean-field theor…
Overcomplete intermediate representation of two-particle Green's functions and its relation to partial spectral functions
Selina Dirnböck, Seung-Sup B. Lee, Fabian B. Kugler +4
Two-particle response functions are a centerpiece of both experimental and theoretical quantum many-body physics. Yet, due to their size and discontinuity structure, they are chall…
Analytic continuation of multipoint correlation functions
Anxiang Ge, Johannes Halbinger, Seung-Sup B. Lee +2
Conceptually, the Matsubara formalism (MF), using imaginary frequencies, and the Keldysh formalism (KF), formulated in real frequencies, give equivalent results for systems in ther…
Emergent Properties of the Periodic Anderson Model: a High-Resolution, Real-Frequency Study of Heavy-Fermion Quantum Criticality
Andreas Gleis, Seung-Sup B. Lee, Gabriel Kotliar +1
We study paramagnetic quantum criticality in the periodic Anderson model (PAM) using cellular dynamical mean-field theory, with the numerical renormalization group (NRG) as an impu…
Symmetric improved estimators for multipoint vertex functions
Jae-Mo Lihm, Johannes Halbinger, Jeongmin Shim +3
Multipoint vertex functions, and the four-point vertex in particular, are crucial ingredients in many-body theory. Recent years have seen significant algorithmic progress toward nu…
Tuning orbital-selective phase transitions in a two-dimensional Hund's correlated system
Eun Kyo Ko, Sungsoo Hahn, Changhee Sohn +12
Hund's rule coupling () has attracted much attention recently for its role in the description of the novel quantum phases of multi orbital materials. Depending on the o…
Reply to: "Extracting Kondo temperature of strongly-correlated systems from the inverse local magnetic susceptibility"
Xiaoyu Deng, Katharina M. Stadler, Kristjan Haule +4
This is a reply to A. A. Katanin's comment [A. A. Katanin, Nat. Commun. 12, 1433 (2021); arXiv:2103.02966] on our paper [X. Deng et al., Nat. Commun. 10, 2721 (2019); arXiv:1708.05…
Computing local multipoint correlators using the numerical renormalization group
Seung-Sup B. Lee, Fabian B. Kugler, Jan von Delft
Local three- and four-point correlators yield important insight into strongly correlated systems and have many applications. However, the nonperturbative, accurate computation of m…
Global phase diagram of a spin-orbital Kondo impurity model and the suppression of Fermi-liquid scale
Y. Wang, E. Walter, S. -S. B. Lee +4
Many correlated metallic materials are described by Landau Fermi-liquid theory at low energies, but for Hund metals the Fermi-liquid coherence scale is found to be…
Strongly correlated materials from a numerical renormalization group perspective: How the Fermi-liquid state of SrRuO emerges
Fabian B. Kugler, Manuel Zingl, Hugo U. R. Strand +3
The crossover from fluctuating atomic constituents to a collective state as one lowers temperature or energy is at the heart of the dynamical mean-field theory description of the s…
Mott quantum criticality in the one-band Hubbard model: Dynamical mean-field theory, power-law spectra, and scaling
Heike Eisenlohr, Seung-Sup B. Lee, Matthias Vojta
Recent studies of electrical transport, both theoretical and experimental, near the bandwidth-tuned Mott metal-insulator transition have uncovered apparent quantum critical scaling…
Non-Fermi-liquid Kondo screening under Rabi driving
Seung-Sup B. Lee, Jan von Delft, Moshe Goldstein
We investigate a Rabi-Kondo model describing an optically driven two-channel quantum dot device featuring a non-Fermi-liquid Kondo effect. Optically induced Rabi oscillation betwee…
Orbital differentiation in Hund metals
Fabian B. Kugler, Seung-Sup B. Lee, Andreas Weichselbaum +2
Orbital differentiation is a common theme in multiorbital systems, yet a complete understanding of it is still missing. Here, we consider a minimal model for orbital differentiatio…
Detecting Kondo Entanglement by Electron Conductance
Gwangsu Yoo, Seung-Sup B. Lee, H. -S. Sim
Quantum entanglement between an impurity spin and electrons nearby is a key property of the single-channel Kondo effects. We show that the entanglement can be detected by measuring…
Numerical renormalization group method for entanglement negativity at finite temperature
Jeongmin Shim, H. -S. Sim, Seung-Sup B. Lee
We develop a numerical method to compute the negativity, an entanglement measure for mixed states, between the impurity and the bath in quantum impurity systems at finite temperatu…
Nonlocal Entanglement of 1D Thermal States Induced by Fermion Exchange Statistics
YeJe Park, Jeongmin Shim, S. -S. B. Lee +1
When two identical fermions exchange their positions, their wave function gains phase factor . We show that this distance-independent effect can induce nonlocal entanglement in…
Filling-driven Mott transition in SU(N) Hubbard models
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
We study the filling-driven Mott transition involving the metallic and paramagnetic insulating phases in SU(N) Fermi-Hubbard models, using dynamical mean-field theory (DMFT) and th…
Generalized Schrieffer-Wolff transformation of multi-flavor Hubbard models
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
We give a self-contained derivation of the low-energy effective interactions of the SU() Hubbard model, a multiflavor generalization of the one-band Hubbard model, by using a ge…
Doublon-holon origin of the subpeaks at the Hubbard band edges
Seung-Sup B. Lee, Jan von Delft, Andreas Weichselbaum
Dynamical mean-field theory (DMFT) studies frequently observe a fine structure in the local spectral function of the SU(2) Fermi-Hubbard model at half filling: In the metallic phas…
Open Wilson chains for quantum impurity models: Keeping track of all bath modes
Benedikt Bruognolo, Nils-Oliver Linden, Frauke Schwarz +6
When constructing a Wilson chain to represent a quantum impurity model, the effects of truncated bath modes are neglected. We show that their influence can be kept track of systema…