Wow Kaylia, you suck at google...
http://arxiv.org/PS_cache/gr-qc/pdf/0202/0202059v1.pdf
There's a paper on ghost radiation formed wormholes, no I haven't read it all yet.
Traversable wormhole space-times are found as static, spherically symmetric solutions to the Einstein equations with ingoing and outgoing pure
ghost radiation, i.e. pure radiation with negative energy density.
That's in the 1st paragraph of the paper. Like I said I haven't gotten much farther, so you'll have to read it for yourself.
Just thought I'd give you a lesson on google, lmfao.