News

[Jihoon Keum, Kai-Xuan Zhang, Giung Park,  Je-Geun Park] Novel magnetic-field-free switching behavio... Jan 23, 2025 l Hit 371

Novel magnetic-field-free switching behavior in vdW-magnet/oxide heterostructure Magnetization switching by charge current without a magnetic field is essential for device applications and information technology. It generally requires a current-induced out-of-plane spin polarization beyond the capability of conventiona...

[Hong-Gyu Park] Strained two-dimensional tungsten diselenide for mechanically tunable exciton transp... Jan 6, 2025 l Hit 369

Tightly bound electron-hole pairs (excitons) hosted in atomically-thin semiconductors have emerged as prospective elements in optoelectronic devices for ultrafast and secured information transfer. The controlled exciton transport in such excitonic devices requires manipulating potential energy gradient of charge-neutra...

[Dirk Wulferding and Changyoung Kim] Magnetic field control over the axial character of Higgs modes ... Jan 6, 2025 l Hit 377

Magnetic field control over the axial character of Higgs modes in charge-density wave compounds Understanding how symmetry-breaking processes generate order out of disorder is among the most fundamental problems of nature. The scalar Higgs mode – a massive (quasi-) particle – is a key ingredient in the...

[Guedong Park, Hyukjoon Kwon(KIAS), and Hyunseok Jeong] Extending Classically Simulatable Bounds of ... Dec 9, 2024 l Hit 384

Extending Classically Simulatable Bounds of Clifford Circuits with Nonstabilizer States via Framed Wigner Functions The Wigner function formalism has played a pivotal role in examining the nonclassical aspects of quantum states and their classical simulatability. Nevertheless, its application in qubit systems faces lim...

[Sunje Kim and Bohm-Jung Yang] Measurement of the quantum geometric tensor in solids (published in N... Nov 26, 2024 l Hit 666

Measurement of the quantum geometric tensor in solids Understanding the geometric properties of quantum states and their implications in fundamental physical phenomena is a fundamental aspect of contemporary physics. The quantum geometric tensor is a central physical object in this regard, encoding complete information...

[Prof. Seung-Sup B. Lee] Emergent Properties of the Periodic Anderson Model: A High-Resolution, Real... Nov 11, 2024 l Hit 412

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, and Jan von Delft Phys. Rev. X 14, 041036 (2024) (Publication date: 7 November 2024) For more than 20 years, quantum criticality in heav...

Rasoul Ghadimi, Chiranjit Mondal, Bohm-Jung Yang] Quantum valley Hall effect without Berry curvatur ... Nov 8, 2024 l Hit 388

Quantum valley Hall effect without Berry curvature The quantum valley Hall effect (QVHE) is characterized by the valley Chern number (VCN) in a way that one-dimensional (1D) chiral metallic states are guaranteed to appear at the domain walls (DW) between two domains with opposite VCN for a given valley. Although in the...

[Seung-Hoon Oh & Kyungwon An] Thresholdless coherence in a superradiant laser (published in Light: S... Sep 6, 2024 l Hit 442

Lasing threshold in the conventional lasers is the minimum input power required to initiate laser oscillation. It has been widely accepted that the conventional laser threshold occurring around a unity intracavity photon number can be eliminated in the input-output curve by making the so-called β parameter approac...

[Gyungmin Cho, Dohun Km] Machine learning on quantum experimental data toward solving quantum many-b... Sep 2, 2024 l Hit 443

Quantum computers hold the potential to solve challenging problems in fields such as chemistry and physics, but the lack of quantum error correction currently limits the types of quantum algorithms that can be implemented. To circumvent this limitation, a hybrid approach has been introduced, where classical computers a...

[Y. S. Teo, S. U. Shringarpure, H. Jeong] Evidence-Based Certification of Quantum Dimensions (publis... Aug 27, 2024 l Hit 333

Evidence-Based Certification of Quantum Dimensions Identifying a reasonably small Hilbert space that completely describes an unknown quantum state is crucial for efficient quantum information processing. We introduce a general dimension-certification protocol for both discrete and continuous variables that is fu...