. "second quantization" . "condensates" . "Groenewold's theorem" . "second-quantized" . "quantization" . . "quantized" . "canonical" . "condensate" . "Canonical quantization" . "canonical quantization" . "novel and more illuminating manner" . "canonical quantization#Field operators" . "Canonical quantization#Field operators" . . "canonically quantize" . "quantization rules" . "Canonical quantization" . "Canonical quantization#Groenewold's theorem" . . "canonically quantized" .