Recent content by ebol

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    Graduate Polariton, polaron, plasmon and spaser

    Hi! I read several articles about the spaser, including Bergman D.J. et al., 2003 Stockman M.I., 2008 Oulton R.F. et al., 2009 I read several articles about the plasmons, including Barnes W.L. et al., 2003 Stockman M.I., 2011 Also, I have the basics of physics ... but I can not seem to...
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    Graduate Polariton, polaron, plasmon and spaser

    Hello everyone! I would like to ask you for help on this: 1. what are the differences between polariton, polaron and plasmon? 2. such as theoretical aspects I have to know to understand the functioning of a spaser? (spaser=surface plasmon amplification by stimulated emission of radiation)...
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    Graduate Demonstration [L_i,x_j]= ε_ijk x_k

    thank you very much! I arrived at the solution but I did not know :D
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    Graduate Demonstration [L_i,x_j]= ε_ijk x_k

    ah! and why? :) Because the indices j and k commute and changes the sign?
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    Graduate Demonstration [L_i,x_j]= ε_ijk x_k

    Hi! I have to show that [L_i,x_j]= i \hbar \varepsilon_{ijk} x_k but my result is different, I'm definitely making a mistake :confused: ok I wrote L_i = \varepsilon_{ijk} x_j p_k then [L_i,x_l]= \varepsilon_{ijk} ( [x_j p_k , x_l] ) = \varepsilon_{ijk} ( {x_j [p_k , x_l] + [x_j...