B. Lu
YOU?
Author Swipe
Domain wall as cosmological oscillator Open
A bstract In this study, we examine the domain wall within the framework of a cosmological harmonic oscillator. We investigate the interaction between the domain wall and a periodic background field, which can induce perturbations in the o…
Revealing the topological nature of entangled orbital angular momentum states of light Open
Topology has emerged as a fundamental property of many systems yet mostly limited to low dimensions. Here, we reveal the hidden topology in entangled states carrying orbital angular momentum (OAM), in arbitrary dimensions. For two-dimensio…
View article: The nano-hertz and milli-hertz stochastic gravitational waves in the minimal clockwork axion model
The nano-hertz and milli-hertz stochastic gravitational waves in the minimal clockwork axion model Open
The clockwork framework can realize TeV-scale $U(1)_{PQ}$ symmetry breaking while generating a large axion decay constant \(f_a\). We propose a minimal clockwork axion model with three scalar fields, in which two domain walls (DWs) have no…
View article: Carbon credit assessment for Mangrove conservation: A detailed study of Futian Mangrove reserve in Shenzhen
Carbon credit assessment for Mangrove conservation: A detailed study of Futian Mangrove reserve in Shenzhen Open
Mangroves are significant coastal blue carbon ecosystems that play an essential role in mitigating climate change. However, due to the lack of reasonable benefit quantification methods and active market regulation mechanisms, the carbon cr…
Quantum skyrmions in general quantum channels Open
Quantum skyrmions as topologically structured entangled states have the potential to be a pathway toward robustness against external perturbations, but so far no theoretical framework exists to validate this. Here, we introduce the notion …
Scalar-induced gravitational wave from domain wall perturbation Open
A bstract Domain walls represent two-dimensional topological defects that emerge from the spontaneous breaking of discrete symmetries in various new physics models. In this study, we undertake the first calculation of gravitational waves p…
Domain Wall as Cosmological Oscillator Open
In this study, we examine the domain wall within the framework of a cosmological harmonic oscillator. We investigate the interaction between the domain wall and a periodic background field, which can induce perturbations in the oscillatory…
Scalar-induced gravitational wave from domain wall perturbation Open
Domain walls represent two-dimensional topological defects that emerge from the spontaneous breaking of discrete symmetries in various new physics models. In this study, we undertake the first calculation of gravitational waves produced by…
Quantum Skyrmions in general quantum channels: topological noise rejection and the discretization of quantum information Open
The topology of a pure state of two entangled photons is leveraged to provide a discretization of quantum information. Since discrete signals are inherently more resilient to the effects of perturbations, this discrete class of entanglemen…
View article: Primordial Black Holes from Domain Wall Density Fluctuations: Bridging Gravitational Wave Observations Across Two Frequency Bands
Primordial Black Holes from Domain Wall Density Fluctuations: Bridging Gravitational Wave Observations Across Two Frequency Bands Open
We propose a novel mechanism for the formation of primordial black holes by demonstrating that the delayed production of isocurvature perturbations resulting from Poisson fluctuations within the domain wall network can lead to collapse and…
Probing Primordial Black Hole Formation from Domain Wall Isocurvature Perturbations: Constraints and Implications Open
Domain walls are topological defects produced by the spontaneous symmetry-breaking of discrete symmetry during cosmological phase transitions. Domain walls can significantly contribute to the energy density in the late-evolution stage. We …
Clockwork axion footprint on nano-hertz stochastic gravitational wave background Open
The recent Pulsar Timing Arrays (PTAs) nano-Hz gravitational wave (GW) background signal can be naturally induced by the annihilation of domain walls (DWs) formed at a symmetry-breaking scale $f\simeq 200$~TeV in the clockwork axion framew…
Unitarity bounds on extensions of Higgs sector Open
A bstract It is widely believed that extensions of the minimal Higgs sector is one of the promising directions for resolving many puzzles beyond the Standard Model (SM). In this work, we study the unitarity bounds on the models by extendin…
Unitarity bounds on extensions of Higgs sector Open
It is widely believed that extensions of the minimal Higgs sector is one of the promising directions for resolving many puzzles beyond the Standard Model (SM). In this work, we study the unitarity bounds on the models by extending the two-…
Updated constraints on the Georgi-Machacek model and its electroweak phase transition and associated gravitational waves Open
With theoretical constraints such as perturbative unitarity and vacuum stability conditions and updated experimental data of Higgs measurements and direct searches for exotic scalars at the LHC, we perform an updated scan of the allowed pa…
Probing dark gauge boson with observations from neutron stars Open
We present an investigation on the production of light dark gauge bosons by\nthe nucleon bremsstrahlung processes in the core of neutron stars. The dark\nvector is assumed to be a $U(1)_{B-L}$ gauge boson with a mass much below keV.\nWe ca…
Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves Open
With theoretical constraints such as perturbative unitarity and vacuum stability conditions and updated experimental data of Higgs measurements and direct searches for exotic scalars at the LHC, we perform an updated scan of the allowed pa…
Testing clockwork axion with gravitational waves Open
We investigate the gravitational waves (GWs) produced from the Peccei-Quinn (PQ) phase transition associated with the clockwork axion. The PQ phase transition can be first-order when the dimension-6 operator is included into the scalar pot…
Evidence of a simple dark sector from XENON1T excess Open
We propose that the nearly massless dark photons produced from the\nannihilation of keV dark fermions in the Galaxy can induce the excess of\nelectron recoil events recently observed in the XENON1T experiment. The minimal\nmodel for this i…
View article: Insight-HXMT Firm Detection of the Highest-energy Fundamental Cyclotron Resonance Scattering Feature in the Spectrum of GRO J1008-57
Insight-HXMT Firm Detection of the Highest-energy Fundamental Cyclotron Resonance Scattering Feature in the Spectrum of GRO J1008-57 Open
We report on the observation of the accreting pulsar GRO J1008-57 performed by Insight-Hard X-ray Modulation Telescope (HXMT) at the peak of the source’s 2017 outburst. Pulsations are detected with a spin period of 93.283(1) s. The pulse p…
Evidence of A Simple Dark Sector from XENON1T Anomaly Open
We propose that the massless dark photons produced from the annihilation of keV dark fermions in the Galaxy can induce the excess of electron recoil events recently observed in the XENON1T experiment. The minimal model for this is the exte…
Constraining primordial black holes in dark matter with kinematics of dwarf galaxies Open
We propose that the kinematical observations of dwarf galaxies can be used to\nconstrain the primordial black hole's (PBH) abundance in dark matter since the\npresence of primordial black holes in star clusters will lead to the radial\nvel…
Constraints on the Sommerfeld- enhanced dark matter annihilation from the gamma rays of subhalos and dwarf galaxies Open
The substructures of the Galactic dark matter halo such as dark matter\nsubhalos and dwarf galaxies have very low velocity dispersions, which makes\nthem useful in constraining the scenario of Sommerfeld-enhanced dark matter\nannihilation.…
Damping of gravitational waves in a viscous Universe and its implication for dark matter self-interactions Open
It is well known that a gravitational wave (GW) experiences the damping effect when it propagates in a fluid with nonzero shear viscosity. In this paper, we propose a new method to constrain the GW damping rate and thus the fluid shear vis…
Comment on “Hearing the signal of dark sectors with gravitational wave detectors” Open
We revisit the calculation of the gravitational wave spectra generated in a classically scale-invariant $SU(2)$ gauge sector with a scalar field in the adjoint representation, as discussed by J.~Jaeckel, et al. The finite-temperature poten…
Limits on dark matter from AMS-02 antiproton and positron fraction data Open
We derive limits on the dark matter annihilation cross section and lifetime\nusing measurements of the AMS-02 antiproton ratio and positron fraction data.\nIn deriving the limits, we consider the scenario of secondary particles\naccelerate…