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Quantization refers to the procedure or methodology for replacing a classical system by a quantum system. If the question is about the quantized or discrete behavior of a phenomenon use the [discrete] tag instead.

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Mode expansion for $p$-branes

In the quantization of $p$-branes, for $p>1$ what is the mode expansion? What I am after, more specifically, is: what is the configuration around which the expansion is made? …
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"Constrain then quantise" vs. "quantise then constrain"

In Dirac Quantization the constraint on the wavefunctions is not $x_1 \psi(\vec x)=0$, but rather $$\frac{\partial}{\partial x_1}\psi(\vec x)=0.$$ This tells us that the 'physical states' in Dirac Quantization … Therefore there is a simple map between physical states in Dirac Quantization and Geometric Quantization: $$\psi_{\text{dirac}}(x_1,...,x_d)=\psi_{\text{geometric}}(x_2,...,x_d).$$ To make the analogy …
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