Detecting Light Boson Dark Matter through Conversion into Magnon

利用压缩相干态增强光子-轴子转换概率

Enhancing photon-axion conversion probability with squeezed coherent states

本文以量子场论方法处理光子-轴子转换，评估了从光子量子态到轴子量子态的转换概率，并发现压缩相干态能增强该转换概率，有助于提升轴子探测灵敏度。

光子环变暗作为Janis-Newton-Winicour裸奇点中光子-轴子转换的特征

Photon Ring Dimming as a Signature of Photon-Axion Conversion in Janis-Newman-Winicour Naked Singularity

本研究探究Janis-Newman-Winicour裸奇点附近的光子-轴子转换，发现质量小于100neV的光子可高效转换为轴子，转换概率受时空特征参数影响，观测特征为X射线与伽马能段光子环变暗，M87*等致密天体可作为探测候选体。

耀变体喷流中的引力子-光子转换作为高频引力波的探针

Graviton-photon conversion in blazar jets as a probe of high-frequency gravitational waves

研究耀变体喷流中引力子-光子转换，利用Mrk 501三种模型计算转换率并约束随机引力波，在10^8至10^15 Hz频段获得更严格限制。

通过光子-引力子量子态转换实现引力子探测

Toward graviton detection via photon-graviton quantum state conversion

本文在量子场论框架下研究磁场中的光子-引力子转换，利用压缩相干态与压缩真空态推导出增强的转换概率，并证明该过程能产生电磁与引力部分之间的非经典纠缠，为引力量子化和引力子探测提供新途径。

Detecting solar axions using Earth's magnetic field

We show that solar axion conversion to photons in the Earth's magnetosphere can produce an x-ray flux, with average energy \sim 4 keV, which is measurable on the dark side of the Earth. The smallness of the Earth's magnetic field is compensated by a large magnetized volume. For axion masses < 10^{-4} eV, a low-Earth-orbit x-ray detector with an effective area of 10^4 cm^2, pointed at the solar core, can probe the photon-axion coupling down to 10^{-11} GeV^{-1}, in one year. Thus, the sensitivity of this new approach will be an order of magnitude beyond current laboratory limits.

Resonant Conversion of Dark Matter Oscillons in Pulsar Magnetospheres

Due to their high magnetic fields and plasma densities, pulsars provide excellent laboratories for tests of beyond Standard Model (BSM) physics. When axions or axion-like particles (ALPs) approach closely enough to pulsars, they can be resonantly converted to photons, yielding dramatic electromagnetic signals. We discuss the possibility of detecting such signals from bound configurations of axions, colliding with pulsar magnetospheres. We find that all but the densest axion stars, $\textit{oscillons}$, are tidally destroyed well before resonant conversion can take place. Oscillons can be effic…

A New Method for Detecting Axion With Cylindrical Superconductor

We propose a method for searching dark matter axion in axion-photon conversion. We consider a superconductor of cylindrical shape under strong magnetic field. The dark matter axion generates oscillating electric field which induces oscillating superconducting current in the surface of the superconductor. The current gives rise to dipole radiation with the frequency $m_a/2π$ given by axion mass $m_a$. We show that the radiation flux generated by the current is of the order of $10^{-18}$W under magnetic field $\sim 3$T in the case of radius $\sim 1$cm and length $\sim 10$cm of the cylindrical su…

Detecting Axion Dark Matter through the Radio Signal from Omega Centauri

As a well-motivated dark matter candidate, axions can be detected through the axion-photon resonant conversion in the magnetospheres of magnetic white dwarf stars or neutron stars. In this work, we utilize Omega Centauri, which is the largest globular cluster in the Milky Way and is suggested to be the remnant core of a dwarf galaxy, to probe the axion dark matter through radio signals that originate from all the neutron stars and magnetic white dwarf stars in it. With 100 hours of observation, the combination of SKA phase 1 and LOFAR can effectively probe the parameter space of the axion-phot…

用盘绕光纤探测类轴子粒子 I：二氧化硅光纤

Detecting Axion-Like Particles With Coiled Optical Fibers I: Silica Fibers

本研究提出利用外部磁场中的盘绕光纤探测类轴子粒子，构建了对应光子-ALP转换的理论框架，固体二氧化硅光纤的主导信号为光子相移，空芯光纤可显著增强ALP信号，有望在大ALP质量区域设定新约束。

Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations

It has been suggested that radio telescopes may be sensitive to axion dark matter that resonantly converts to radio photons in the magnetospheres surrounding neutron stars (NSs). In this work, we closely examine this possibility by calculating the radiated power from and projected sensitivity to axion dark matter conversion in ensembles of NSs within astrophysical systems like galaxies and globular clusters. We use population synthesis and evolution models to describe the spatial distributions of NSs within these systems and the distributions of NS properties. Focusing on three specific target…