**Authors:** XiaoLin Li

In 5-dimensional space-time, Quantum Mechanics have a special particle-wave symmetry. To particle wave, its phase velocity, and its group velocity, is equal, and the two speed value is invariant. This is very similar with the light speed C in Special Relativity Theory. We mark this speed with Vc . But, different particle has different Vc , not all particles have same Vc . To one Vc value, there exist one kind of particle. Particle in Special Relativity Theory is just one kind. In Special Relativity Theory, Vc = C. Light speed C is just a special instance of Vc . Quasi-particle in Condensed Matter Physics, is another sample of Vc . The new particle-wave symmetry contain the Lorentz symmetry. The new particle-wave symmetry is a extension to Lorentz symmetry. The Lorentz symmetry is just a special instance of particle-wave symmetry. But the new particle-wave symmetry no longer is limited by speed light C. The particle-wave symmetry has variable speed Vc . So, Special Relativity Theory will be just a derived result of Quantum Mechanics. In 5-dimensional space-time, in new theory , space and time is not relative, space and time is obsolute. We need rethink about these physical concepts, mass-energy equation, rest mass, inertial mass, gravitational mass. From the new symmetry, we can get new kind of particles which perhaps have relationship with cosmic dark matter and radio burst.

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[v1] 2017-03-23 03:01:56

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