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- Thread starter eljose79
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instanton

But, you have to realise that even in one two dimensional spacetime (one space one time) your functional "Schrodinger equation" is a infinite number of coupled partial differential equation, which makes it very difficult to solve.

There are certainly some advantage of using canonical method over covariant perturbation theory especially if you want to prob some non-perturbative regime like question regarding vacua or solitonic objects.

Instanton

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