Umbral methods and operator ordering
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🧮 math-ph
math.MP
keywords
methodsoperatororderingumbraladvantageapplyconcerningdiscuss
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By using methods of umbral nature, we discuss new rules concerning the operator ordering. We apply the technique of formal power series to take advantage from the wealth of properties of the exponential operators. The usefulness of the obtained results in quantum field theory is discussed.
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