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\(\newcommand{\ket}[1]{|#1\rangle}\newcommand{\matrixelement}[3]{\langle#1|#2|#3\rangle} \)
Use Wick's theorem to evaluate and calculate the following free field time ordered operator product \[\matrixelement{0}{T\big(\phi(x_1)\phi(x_1)\phi(x_1)\phi(x_2)\phi(x_3)\phi(x_4)\phi(x_5)\phi(x_6)\phi(x_7)\big}{0 }\]
Here \(\phi(x)\) represents free scalar field.
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4727:Diamond Point
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