Q85. the dynamics of a free relativistic particle of mass m is governed by the dirac hamiltonian h=cā.p+bmc', where p is the momentum operator and a = (a,a,,a.)

Q85. The dynamics of a free relativistic particle of mass m is governed by the Dirac Hamiltonian H=cā.p+Bmc', where p is the momentum operator and a = (a,a,,a.) and are four 4x4 Dirac matrices. The acceleration operator can be expressed as -at) (Ha (b) 2ic aB d)- 2ic p +äH) h