Last Updated：2025/12/02
Sentence
ウィックの定理は、任意の生成・消滅演算子の積を対の積の和に還元する手法であり、場の演算子の時間順序積を縮約の和として表現できるため、量子場理論における摂動計算を大幅に簡素化します。
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Wick's theorem allows us to reduce time-ordered products of field operators to sums of pairwise contractions, greatly simplifying perturbative calculations in quantum field theory.
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Wick's theorem allows us to reduce time-ordered products of field operators to sums of pairwise contractions, greatly simplifying perturbative calculations in quantum field theory.
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Related words
Wick's theorem
Proper noun
Japanese Meaning
量子力学において、高次の演算子の積（例えば創造演算子と消滅演算子）の和を、ペアごとの積の和として表現するための定理。特に、複雑な演算子の積を組み合わせ論的な問題に還元する方法として用いられる。
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