Tensor Energi Momentum dari Medan Skalar
Rapat Lagrangian medan medan skalr ϕ diberikan oleh
![\pounds =\frac{1}{2}(\partial _{\mu}\phi)(\partial _{\mu}\phi)-\frac{1}{2}m^2\phi^2](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u86XsWgvwplOmF4fi1Ojiam0PBYJRXsTZ4JJqbeY1Zz9EaFKH35OleGmTX_a9b2i1qmk6SJYAhgEGog7UQV4HrbFHBNGrd-W1eMYaGPYKmNIychp-ik-MI7snJ2e_Fh6PlKunX0IBkVA7gccdFKqQpHdpKbHChhOqFR2-rV0eLpPZBAEwzM0qIMvj5K7amZoGGuNlgyo52sY0zrtwimmNcedt4FaY0waxRatjEuHnESRAy0qHA95ixDO97s4CS9jGCBm6cnp8dKEKlL_v-oiF8_hRXgFz1WxJF33iYSA=s0-d)
Sebelum mencari Tensor Energi Momentumnnya
maka terlebih dahulu kita cari variasi aksi
medan skalar ϕ
![S_{M}=\int d^4x\sqrt{-g}\pounds _{M}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vkm1meyo4TLkvcuSwBraiZe9IhAbD3bQzLs2rJ8lQxH8tUWpoZRsPTpuGcC5i8gfHFWF-wonHoAxGfDvKjLCv8s4Tyzz_gpRzJJJIkroRL2ZNyDSbyTkekGXZIU4Qfu3UaB63R0YqVo0UhJCbqefJ7Jjwwj5Sa18z0DaMJ0OATke1NpzOHbUWuwfm9=s0-d)
![\delta S_{M}=\int d^4x\delta(\sqrt{-g}\pounds _{M})](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uZ15gfRYBpex-A5sqOdIw_jQbBa0PLx7qXAu61xAKX7wXDpB1yVz8FuVbcaCXBhah3zENN5sqrb08TuPs3RjAmAUBCfnADKp0KHmha3_0d6dCzFJPXJn2e2kghQfvCq8dsTHB_xSBp560KbQ9M1DzzmF6VZSjXGaJ9bDqbKx9QPa9n9fcP-NUduMIw3Fglt8mZDxKsSkqSWCQiIg554yiNJn0ymnU=s0-d)
![\delta S_{M}=\int d^4x\delta{(\sqrt{-g}\(\frac{1}{2}(\partial_\mu\phi)(\partial_\nu\phi)-\frac{1}{2}m^2\phi^2)}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sMqdVOab6OQfJ1edd0t5luFWCKE6HO6GZq6-besLtyMo7T-2zmnvhuq6_hxOrFQf9HPqXxa-VGlaw6CwyzdRbSnOIcczyjifauVGbaJk5PP_4sCf3ipoa03K_dFGR6vyJg01JgnWxUuNM9P9J07ypwAxa84IWq1kJ2gUMmNf8czCmzQsF5bbIrgLTVkxkQRv9whEs7xlpi7C5RGYjAr8OArFfCTjD5PjfJnSyMuQMvDevfRTT4gGZOAiSnroX4nr_f8xtjmkzwDfvvEMrP5tkFhXWgVY8cKZ5fpy0TM0jdHULpesN285OihpiRjlXhUmq1JeIBLuaQoCAhXS4gVnsX=s0-d)
![\delta S_{M}=\int d^4x\delta{(\sqrt{-g}\(\frac{1}{2}(\partial_\mu\phi)(\partial_\nu\phi)-\frac{1}{2}m^2\phi^2)}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sMqdVOab6OQfJ1edd0t5luFWCKE6HO6GZq6-besLtyMo7T-2zmnvhuq6_hxOrFQf9HPqXxa-VGlaw6CwyzdRbSnOIcczyjifauVGbaJk5PP_4sCf3ipoa03K_dFGR6vyJg01JgnWxUuNM9P9J07ypwAxa84IWq1kJ2gUMmNf8czCmzQsF5bbIrgLTVkxkQRv9whEs7xlpi7C5RGYjAr8OArFfCTjD5PjfJnSyMuQMvDevfRTT4gGZOAiSnroX4nr_f8xtjmkzwDfvvEMrP5tkFhXWgVY8cKZ5fpy0TM0jdHULpesN285OihpiRjlXhUmq1JeIBLuaQoCAhXS4gVnsX=s0-d)
![\delta S_{M}=\int d^4x\delta{(\sqrt{-g}\(\frac{1}{2}(\partial_\mu\phi)(\partial_\nu\phi)-\frac{1}{2}m^2\phi^2)}+\int d^4x\sqrt{-g}(\frac{1}{2}\delta g^{\mu\nu}(\partial _\mu\phi)(\partial _\nu\phi))](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_v589tDEzV7xRWmWYnlIYcWHhWSJBb1vjlLNYjApRD2cL0qQnlnOS5WFrJfGEQ4FX7CywhwAuzxavgrQLBfnbQi36-ZeRO63kBlZ6bUZ3bPsYva9qgUY5KGhZlEcYWJWf6ul6obc41omYsJFwqwoxkFvfqsBvsKIa8nq9uv71yS_vW-kA_CgKGbKUoo50noyNJ3ZQzMRdNboG3tE8Mk9dLXKtRL5gA0cPSIYHIdrhE0iiqjyFbNM6A9NWKuaICo6xuqgEhM61tY72PP1dsn300ESFA1AVNeTWr6o072VObq2xUVVbKnOOGIwp_diIQcNXECunnRe_I6kWzKlGpAcsnSfrG9Js7MFLTBULJaxtAlJLOenZNw3ZPP8AZm9NyOrjz0kqa29DTH8138Dakbjy5Y4vZnln253MV5gmvFLQj0CWAgeER51qxrimAl-ufkiL7JSiBrryEhQWn6GiTQLQv-jTed3t5BSUbEvxp2Hjgg6RmB2O4K-tRvF8ReAbE2WwJTsnRSD_dvtbOmOfInrlBR24Pd5IWpktyoTTo=s0-d)
ingat bahwa
![\delta \sqrt{-g}=-\frac{1}{2}g_{\mu\nu}\delta g^{\mu\nu}\sqrt{-g}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_udtFNOfgrCvMmBvCv3V3eksrdQ8jpWRa8ubzS4wMLRCp7lCWEWcNGeI1aLWxT7nh4TV9VESmLZZv6ZTQMM7JVsXbBA0_GzFjTBSVpDCBE8Ijf1iVOKvPHhGIcB09KXbzuarBViF0Cj45_HQC9v2RJoAbaJdo3Mo04JknsiaYBXeQJN_fsC4_mglc4IJyNA7rftMOaVMN1xzuzWB8ZderVs2SYyWdOcUkGX_N5a72oFBZls-6KzYopYV4IY9KvCdSg=s0-d)
![\delta S_M=\int d^4x(-\frac{1}{2}\sqrt{-g}g_{\mu\nu}\delta g^{\mu\nu})(\frac{1}{2}g^{\alpha\beta}\partial _\alpha \phi\partial_\beta \phi-\frac{1}{2}m^2\phi^2)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_syA6OlEqpDP-3dhf72b_Mzc_w6s88GOHmppyIBeeBbe_IUOwIoR9RFobqQMP3ugJyMPwbnkqRtwRzju-BqQLaVtXiBuGl-WvruiuNIgawtCdN4HiATbljckWZhQy3hjZvEpFeg2SJDnzcc3gijgnBJITBXKd6igPRum9kGl3lNiYWglwyyPKAOJuNynPp_aF-JcQoY-6dYiFP0pdCvQPFWyYFyNyl-ngGY0NoyaIYXlZ4xh5zl7twMjI2l520Li7Gkf_a_nFiMCOWNlgqT9mjBqOSUQSJ54ijVoclpUqzCuvQgY6efa51YTSUKArjW94_WvEx7KC6Xuoq8Z9vb6V143Le6xDYzvEzlcC5tJhNTasZiVv4NxrdR9I2_akVZM5O1S5X3NP7DdUAnuuJ8yYukGf58qGVkrdhXqsXHP3i5H9uvLCqKWFaKXzfSmOp6GnzLuP1cBmI1Eb4TcAf9c_sFtQd0tcI=s0-d)
![+\int d^4x \sqrt{-g}(-\frac{1}{2}\partial _\nu \phi \partial _\mu \phi)\delta g^{\mu\nu}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vd16xO79fwtDxggZMTDQ7WwIyZoFDbHan1PB2l-ZwYuA6Ha9oO_eZk4Iqp-qQ0SH5F0JwrKRnMp9wIkAxy9dbq7MW4o1TnQVv9tX7HeiTR9yO3-5FE-OJpSgHfyZR-4LQOg7aYObF9evK5evdZDzwe6gkCFNMvMuxeCNwhAFi5U-dBYpcPeA124SjmlkcN9KlKFNvEjuLd_SOCvYO6ogVJUeGxyNyy0nociUp27PdlGiCP0W9RhTFMDM-Dsh2CTKRw1WUGdNGvwXA4xcdguuPMhXe4zmpxBzJ9uLYJ5x_S-bVdNf9-5kSGbI1GJYxe6tcv-vJRPjri8yjDoqY=s0-d)
![=-\frac{1}{2}\int{d^4x}\delta\sqrt{-g}((\frac{1}{2} g_{\mu\nu}g^{\alpha\beta}\partial _\alpha \phi \partial _\beta \phi-g_{\mu\nu}\frac{1}{2}m^2\phi^2))+\partial _\nu \phi \partial _\mu \phi)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tar_KdCNskrdVQ6AY1CiB1TCOAdfjxhoQWHIbRo2kNl2eeK-A_SoT-uqKY35uqW7h_Hf8KAIfUTbdKgZtL6VZjbS_I4GxDj1P67TfuL0YCYiNQha_OI0z-_l56LvI5-djVa_tlTxEriU1jOR85wEMwf08Vt_T9ePdTGTMuloD2qwof77PrLY-oZpiz9oHftZvThzZldGB0GvqQ25FmYVQhV_hamvgmgLwVjXavPSsnRD-COPIFZx-G_EodwLacqSGFgNtKVvmG501hdGlTv1cN0sTMEj4n7Cca2JFsak_-YFEGVKtMVzZ6T7Yh49srsOo2ZLdW5SA1EnZsxa9CaMUVTqdwzgy9Z6X5XyXE9LAImkOvH2rOgQl6vn43lLIf3tJgL586wxnSqlFG222tIBCNnAF0zTD4jNuaD0Tir0ZmZZ7-wo-_kJVF5tPiyoiiUp8Jb4Zgiou5400sznQzUUGbzRH-g0ZbyQ3sFo9mE2mn9qXZ3MDeAn4XjDLrr_MQvAB0lrVR7AU93Qwf5d0iItwvtDDC2Jgw25KNVl7varhOvA932PYGj83LkHSpi0uiQQ=s0-d)
kemudian dari variasi medan skalar kita cari Tensor energi momentum yang diberikan oleh
![T_{\mu\nu}=\frac{2}{\sqrt{-g}} \frac{\delta S_M}{\delta g^{\mu\nu}}](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vnIInNYmBQB9NK95UIMgeDz-lCSWdbjKdjA0qyN8ZGekYIfwJMQlzKjH8_hqtsvqKlbUvNM4u6bmBB7ToG5qOZwMsFN8bhMFj5h75dX_35_o5xYor9crX4xD87osnbPDX7vkZ9VxcjErN8bOjw7IEB_-n3zvh4Y4k4-zmU-cTWR9ogh_wGRjfLzwXDrRQ4JLgLd0PG9j_KkxtvF75XXlnQiw6ygyjgHaiUBC9TLYOOn9v9E1N9lSxz4tR69YUyXCl0p-JwGgQsihN7PSUP=s0-d)
dengan menyulihkan
kedalam persamaan tensor energi momentum, maka diperoleh
![T_{\mu\nu}=\partial _\nu\phi \partial_\mu \phi-\frac{1}{2}(g_{\mu\nu}g^{\alpha\beta}\partial_\alpha \phi \partial_\beta \phi-g_{\mu\nu}m^2\phi^2)](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vZVdA3Vz8ieZoslBrKBowoPOXTDNqeFnVCXCQLPWJbCtO3fHn-gCg32PUcnF6doAkqVTpSNdQiEW0fWRg337l11xuAXpjq3Lez2rAfK26nCscU5B-1sge1Vi36uM93PWRhQhlBuXP6KBPucInoz45y9YTvS5BOkbqwqQujvKSpVet7uTFWyhvyzyi0Hlj7GZndgFpL9lmr9jXrXU2Yk5_gP1HlRylQlYHquKiKiSe9tRXHGp8NfFYgU7SBpuVRJr20onytXpds6_Q-brmUwFOYNBfUBB1LeKN1OUye9kWVJhx6qszyEY_ts7FOY4idLGCTBzUduCYi-fu_eQOtGm30b3UsF7md24q7eVBGndKrmRWr1x-hCLF1zuw-gBjPGKNQuwae6KLyHH8nDmEHf5AD38UlXzAobHspzsTv_a5lWg2ApzRH5yI=s0-d)
versi PDF klik di bawa ini.
https://drive.google.com/open?id=0BzTqBjtJEvnAU3ZyRzMzMXY4MkU
Sebelum mencari Tensor Energi Momentumnnya
medan skalar ϕ
ingat bahwa
kemudian dari variasi medan skalar kita cari Tensor energi momentum yang diberikan oleh
dengan menyulihkan
versi PDF klik di bawa ini.
https://drive.google.com/open?id=0BzTqBjtJEvnAU3ZyRzMzMXY4MkU
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