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Published bySøren Thomsen Modified 5年之前
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李昕 中国科学院高能物理研究所 E-mail:lixin@ihep.ac.cn
时空各向异性与Finsler几何 李昕 中国科学院高能物理研究所
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一.Finsler几何 Shiing-Shen Chern: Finsler geometry is just Riemannian geometry without the quadratic restriction 计算太复杂了! (线元的形式为四次根式)
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Finsler geometry is base on the so called Finsler structure F with the following property F(x,λy)=λF(x,y), where xM represents the position and yT_xM represent velocity, M is an n-dimensional manifold. The Finslerian metric is given as The length in Finsler geometry is given as
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Geodesic equation The inner product of two parallel transported vectors is preserved if F is Riemannian metric, then
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Flag curvature (generation of section curvature )
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Examples of Finsler spacetime
F=F(y) Randers时空 Bimetric
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Killing equation “平坦”Finsler时空中最大独立Killing矢量个数 N(N-1)/2+1
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Finsler引力 测地线偏离方程: Newton引力 泊松方程 广义相对论 真空场方程
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Finsler 时空 真空场方程 ?
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真空场方程的弱场近似解 We suppose the metric is close to the “flat” metric
The solution of the gravitational vacuum field equation is of the form
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如果\eta_{\mu\nu}是Randers度规,则
Finsler引力波 如果\eta_{\mu\nu}是Randers度规,则
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引力波的超光速传播
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牛顿近似 静态场、低速 R = 0处有一引力源M
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Dynamical equation 取 MOND
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Finsler物理的过去 Dark matter Neutrino mass and Glashow’s VSR
Pioneer anomaly GZK cutoff
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Now: 观测与实验 Keck与VLT望远镜通过类星体吸收谱发现精细结构常数的偶极结构 OPERA实验组发现muon中微子超光速?
子弹星系团的引力中心与物质中心分离
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1.精细结构常数的偶极结构
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在Randers 时空下 引力红移
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A~10^-7, B~10^-8
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2.OPERA T. Adam et al. [OPERA Collaboration], arXiv: Muon中微子的速度
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OPERA(red), MINOS(blue), FERMILAB(black)
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Solution: Finsler spacetime?
A. Cohen and S. Glashow, arXiv: Bremsstrahlung Solution: Finsler spacetime?
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Finsler线元 色散关系 粒子运动速度
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A~10^-18
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3.子弹星系团的引力中心与物质中心分离 观测手段
X-ray imaging of the hot intracluster medium (ICM) Strong and weak gravitational lensing surveys
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子弹星系团 暗物质 修改引力 ? ? 或 ICM气体表面密度分布(红色) 空间曲率 分布 (蓝色) (Dark Matter)
(Modified Gravity) ?
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子弹星系团的Σ-Map
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子弹星系团的κ-Map Prefer direction?
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Finsler物理的未来 Finslerian effects in QED
Finslerian black hole: solutions and thermodynamics Anisotropy in large scale spacetime Some applications
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Thank You !
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