I assume you have RewriteEngine On somewhere in the file too? The QUERY_STRING variable doesn't contain the question mark so drop that from the RewriteCond. If you are placing these directives in a .htaccess file, then also remove the forward slash from the /home part in your RewriteRule (if you are placing it in the VirtualHost however, it should be there). You should probably escape the dot in the RewriteCond by adding a forward slash to the start of it. Other than that you should be good to go.
If you still get the 500 server error then perhaps mod_rewrite isn't enabled. You can check by wrapping your rewrite directives in an IfModule block,
# your code here
It won't make it work, but if it stops your server from crashing then you know mod_rewrite isn't enabled.
On a side note, I generally find that it's best, when working with rewrites, to always use 302 status code. Once you are happy everything works OK, you can change it to a 301, but testing with a 301 is a pain because your local DNS / browser can cache the redirect meaning you may not be seeing what your current code is really doing.