|||
理论物理学要点及其发展(
47)(接(46))
46.4维时空引力
对于在[矢r(X)]处,运动质量为m(X)的粒子,受到在[矢r1(X)]处,引力势为U(X)=km1(x)/s(X)=km1(x)/(r(X) - r1(X))作用下的引力为:
F(g,X)= m(X)[U(X)的梯度]
=(m(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))[偏分矢r(X)]km1(x)/(r(X) - r1(X))
=(m(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))
[偏分矢r(X)]km1(0)/( (1-(v1(X,(3))/c(3))^2)^(1/2)) (r(X) - r1(X))),
=(m(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))
=[(m(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))
[偏分r(X,x)](km1(0)/( (1-(v1(X,(3))/c(3))^2)^(1/2))(r(X) - r1(X)))
[基矢(X,x)],x=0到3求和]
=km(0)m1(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))
[{([偏分r(X,x’)](1/( (1-(v1(X,(3))/c(3))^2)^(1/2))(r(X) - r1(X)))
+(1/( (1-(v1(X,(3))/c(3))^2)^(1/2))(r(X) - r1(X)))
dr(A,a’)dC(XA,xa’)C(AX (a’x’))}[基矢X(x’)]
,x,x’,a’=0到3求和]
=km(0)m1(0)/(1-(v(X,(3))/c(3))^2)^(1/2)))
[{([偏分r(X,x’)](1/( (1-(v1(X,(3))/c(3))^2)^(1/2))(r(X) - r1(X)))
+(dr(A,a’) w(Ax’,xa’)/( (1-(v1(X,(3))/c(3))^2)^(1/2))(r(X) - r1(X)))}
[基矢X(x’)],x,x’,a’=0到3求和],
其中,r(X) - r1(X)=(( r(X,0) - r1(X,0))^2+( r(X,(3)) - r1(X,(3)))^2)^(1/2),
当r(X,0) - r1(X,0)<< r(X,(3)) - r1(X,(3)),为远程力;
当r(X,0) - r1(X,0)>> r(X,(3)) - r1(X,(3)),为近程力。
它们中,也都含有反映时空弯曲特性的相应各量。
当其中,全部w(Ax’,xa’)=0, 就蜕化为惯性牵引运动的情况。
(未完待续)
Archiver|手机版|科学网 ( 京ICP备07017567号-12 )
GMT+8, 2024-4-20 22:04
Powered by ScienceNet.cn
Copyright © 2007- 中国科学报社