Does String Theory Link the Gravitational Constant to Planck's Constant?

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SUMMARY

String theory posits a connection between the gravitational constant (G) and Planck's constant (h), aiming to unify gravity with quantum physics. However, the theory is plagued by numerous undetermined constants, allowing for a wide range of possible values for G. This flexibility complicates the establishment of a definitive prediction for G within the framework of string theory. Further exploration of these constants is essential for a clearer understanding of their implications.

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  • Understanding of string theory fundamentals
  • Familiarity with gravitational constant (G) and Planck's constant (h)
  • Basic knowledge of quantum physics
  • Concept of undetermined constants in theoretical physics
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Physicists, theoretical researchers, and students interested in the intersection of gravity and quantum mechanics, particularly those exploring string theory.

Sanjay87
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Hi,

A few years ago, I heard that string theory suggested a link between the gravitational constant (G) and Planck's constant (h). Is this true? If so, what value of G does string theory predict? Any references would be much appreciated.

Thanks,
San
 
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Since the whole point of string theory is to connect gravity with quantum physics, that would certainly be expected. But one of the problems with string theory is that there are so many "undetermined constants" that you can set them to give pretty much anything you like for both.
 

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