I will study gravitation quantization(string theory or canonical quantum gravity),so I want to know what are the difficulties of gravitational quantization scheme.I know that quantization means that calculating commutator of quantum field operators via Poisson brackets.Are the difficulties being the nonrenormalizable?But I hear that it is not hopless,because we can use an infinite number of counterterms.(adsbygoogle = window.adsbygoogle || []).push({});

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# What are the difficulties of gravitational quantization scheme?

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