Transition metal dichalcogenides (TMDs) have recently emerged as a promising platform for exploring novel moiré physics. So far, however, moiré excitons have only been observed and studied in semiconducting TMD heterostructures. In this work, we explore the unique properties of moiré excitons formed in heterostructures combining TMDs and complex oxides. By integrating these two material...
This study explores the polarization properties and Stark effect of blue quantum emitters within hexagonal boron nitride (hBN), highlighting their potential as future tunable quantum light sources. The emitters are created by lattice defects in hBN using focused electron beam irradiation. Photoluminescence (PL) spectroscopy reveals unique polarization properties in both absorption and emission...
Neutrinos during propagation are influenced by matter effect. It turns out the refractive index depends on how neutrinos interact with a medium. This gives us an incentive to study neutrino dispersion phenomena under the facets of energy, flavour, and neutrino/antineutrino. We further investigate if there is a practical application.
Moiré excitons in transition metal dichalcogenides have attracted considerable attention in recent years due to their unique electronic and optical properties. However, experimentally exploring the connection between moiré pattern and electronic structures remains challenging . In this study, we report the fabrication of WS$_2$ twisted homobilayers on hollow substrates, enabling the study of...
One of the methods for studying large scale magnetic field structure of the intracluster medium (ICM) is through rotation measure (RM) analysis. By measuring how the linear polarization of background light sources change through the ICM, we may infer the properties of the medium, such as its magnetic field orientations and the electron density distributions. Recent RM observations of the...
Single-photon sources in wide-band gap hexagonal boron nitride (hBN) hold great promise for applications in quantum communication and quantum key distribution. However, the production of high-quality quantum light sources in hBN remains a challenge. In this work, we focus on fabricating blue quantum emitters (near 436 nm) via electron bombardment, combined with thermal annealing and plasma...
Two-dimensional superconductors are crucial for exploring quantum phenomena and understanding high-temperature superconductivity. They are vital for developing superconducting nanoelectronics and exhibit unique transitions under magnetic fields. By depositing or sandwiching a metal thin film with strong spin orbital coupling on a bulk superconductor is a promising route to realize 2D...
Single-photon emitters (SPEs) are vital components for advanced quantum communication technologies. Hexagonal boron nitride (hBN), with its wide bandgap and van der Waals properties, presents a promising platform for room-temperature SPE operation. In this study, we substantially increase the density of quantum emitters in hBN by immersing the materiaes l in organic solvents, followed by...
Steerable states provide a quantum advantage in subchannel discrimination tasks. In this work, we experimentally demonstrate a discrimination task with high-dimensional entanglement and show how local filtering operations can enhance its success probability. By distilling the steerable states, we boost the discrimination probability close to 100%. Our work also confirm the generality of this...
Topological superconductors are important materials in condensed matter physics and have potential applications in quantum computing and technology. Introducing magnetic impurities to a superconductor induces magnetic exchange interaction coupling with the Cooper pairs in superconductor. In this work, we have studied the Yu-Shiba-Rusinov (YSR) states of Fe adatoms on Ni Kagome lattice on...
Aims. Cold gas ( $T \sim 10^4$ K) filamentary structures with H$\alpha$ emissions were found around central regions of some cool-core galaxy clusters. We wish to compare the results between observation of the Perseus cluster and our simulation in order to interpret velocity structures of observed filaments.
Methods. We perform hydrodynamic simulations to trace gas motions in the Perseus...
Scaling symmetry of space time plays important role in many physical phenomena. For example, the CMB spectrum of cosmology and critical phenomena in condensed matter physics are governed by scaling symmetry. In this project, we consider anisotropic scaling symmetry in non-relativistic system and study its effect on quantum mechanics. As an example, we consider an anisotropic Josephson junction...
Radio galaxies are a subtype of active galactic nuclei (AGN) generated by supermassive black hole jets. Polarization measurements of the radio lobes could potentially probe the magnetic field geometry and initial magnetization of the jets. Previous polarization observations have found magnetic field aligned with the jet axis; however, the connection between the magnetization of the jets and...
Quantum size effect has received much attention because of its fundamental importance and potential applications in nanoscale electronic devices. Our group focuses on investigating quantum size effect in monolayer manganese (ML Mn) on Ag(111) by scanning tunneling microscopy (STM). According to scanning tunneling spectroscopy (STS) measurements and theoretical calculations, we observe two...
Antiferromagnets are crucial in fundamental research and spintronic applications.According to Gao et al., the noncollinear antiferromagnetic structure was observed in Mn monolayer on Ag(111). In this work, we have systematically studied the strain-tailored nonollinear spin structures in the Mn bilayer on Ag(111) by using spin-polarized scanning tunneling microscopy and DFT calculations....
Primordial black holes (PBHs) formed during the early universe provide a unique probe of physics beyond the Standard Model. In this study, we investigate the impact of additional degrees of freedom from supersymmetry (SUSY) particles and the memory burden effect (MBE) on the evaporation process of PBHs formed via first-order phase transitions. By analyzing how these factors influence the PBH...
The Kitaev honeycomb model is an exactly solvable model that hosts a quantum spin liquid ground state, a novel phase of matter characterized by non-trivial many-body entanglement. This phase exhibits phenomena such as excitations with fractional statistics and topological features. Parton construction can decouple the up and down spin sectors of the Kitaev honeycomb model, leading to the...
On-Surface Synthesis is established for the creation of extended, one- and two-dimensional macromolecules by homo-coupling directly on a surface [1]. In comparison to classical solution based-chemistry, On-Surface Synthesis has a reduced parameter space (temperature, light) and currently focuses on developing reaction selectivity. Precursor design controls product formation. The build-up of...
The conductor-to-insulator (CtI) phase transition in silver-nanoparticle composites' static material and electrical properties has been explored for years, except for its potential for further applications based on dynamics, i.e., time-varying properties running. Traditional applied percolation theory suggested no hint of memorability demonstrated in our work. Then, our research examines the...
The manufacturing process of carbon fiber can be divided into four parts including stabilization, pre-carbonization, post-carbonization and graphitization. Among four parts, post-carbonization and graphitization must be carried out in higher temperature. According to some research, using microwave heating can get better efficiency in comparison with conventional heating. However, plasma is...
We use 3D special relativistic hydrodynamic (SRHD) simulations to study AGN-driven winds in a disk galaxy. Our results reveal an early-stage (t ~ 0.1 Myr) asymmetry in bubble formation, with one bubble reaching velocities up to 2000 km/s while the other remains underdeveloped due to interactions with the clumpy disk. This aligns with JWST observations of NGC 7469, which show a circumnuclear...
What is the origin of the Extragalactic Background Light (EBL)? Observations have shown that the integrated light from individual galaxies in near-infrared is insufficient to explain the near-infrared EBL. Two candidates for the excess EBL light are first-generation stars and intra-halo light, which predict distinct EBL in the visible wavelength. To uncover the true origin of the EBL, precise...
Supernova remnants (SNRs) are considered the primary sources of Galactic cosmic ray acceleration. Particles are energized at the shock front through the diffusive shock acceleration mechanism, gaining energy by repeatedly crossing the shock. Magnetic turbulence plays a crucial role in scattering these particles back and forth; therefore, investigating this turbulence is essential for...
In recent years, research on magnetars has become popular, making the search for progenitor stars of rapidly rotating compact objects an important topic. Accreting stars in binary systems can gain additional angular momentum through Roche Lobe Overflow (RLOF) from the donor star, affecting the rotation rate of the accreting star. Therefore, they are considered a way to produce fast rotating...
We demonstrate high-visibility Hong-Ou-Mandel (HOM) interference between two independent attenuated lasers, each probabilistically producing single photons at telecom wavelength (near 1550nm). By employing precise frequency locking, polarization alignment, intensity balancing, and temporal synchronization, we achieve visibility close to the theoretical limit of 50%. Our results are promising...
Why can't we see alien civilizations in this vast universe? This is an age-old question known as the Fermi paradox, which still has no answer today. In a simulation-based study conducted by Zackrisson et al (2015), a Kardashev type-III alien colony could control 50% of the Milky Way (MW) galaxy within 25 Myr when it originated in our solar system. Similar research conducted by Wright et.al...
Quantum LiDAR is a method that combines quantum light sources with LiDAR techniques, leveraging quantum characteristics for sensing applications. However, in practical scenarios, immense noise and low reflection rates often cause quantum light to be overwhelmed by classical light, reducing its efficiency. Inspired by the spread spectrum technique, we implement phase modulation at both the...
We study random ( S = 2 ) antiferromagnetic Heisenberg chains with alternating bond strengths using the tensor network renormalization group method. In the clean limit,\cite{Damle2002} dimerization induces two quantum critical points separating three valence bond solid (VBS) phases: ( (\sigma, 4 - \sigma) = (2,2), (3,1), (4,0) ), characterized by ( \sigma ) valence bonds on even links...
The NGC7538 IRS1 is a hyper-compact HⅡ region located in Perseis at 2.65kpc. The luminosity of IRS1 is around , suggesting it embeds the O6 star. Previous the outflow, magnetic structure, and abundant molecular line have been studied. The P-Cygni and inverse P-Cygni profiles have shown in different lines, associated with distinct dynamics structures. We present 345GHz. SMA observation with...
Physics-inspired neural networks (PINNs) have gained considerable importance in recent years in the domain of Astronomy & Astrophysics, particularly, being a potential tool to solve differential equations within the given boundary conditions, not limiting to accurate predictions but also providing efficient approach for large computations. In this work, we have focused on solving the kilonova...
