Quantum Gravity

“If you thought that science was certain - well that is just an error on your part.”

Richard Feynman 

       Quantum Gravity

    The biggest unsolved problem in fundamental physics is how gravity and the quantum will be made to coexist within the same theory. Quantum Gravity is required to make the whole of physics logically consistent. The problem is that quantum physics and general relativity already overlap each other’s domains, but do not fit together.

The biggest challenge with quantum gravity, from a scientific point of view, is that we cannot do the experiments required. For example, a particle accelerator based on present technology would have to be larger than our whole galaxy in order to directly test the effects. This means that quantum gravity today is not yet science in the strict sense. No experimental input exists that can inspire and control theoretical ideas, and historically we know that theoretical “progress” then usually occurs in completely wrong directions.

Einstein’s dream was to describe the whole of nature in a single theory. That dream is still not realized. 

Resource : International Journal Of Modern Physics & Applications 

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