2 papers
astro-ph2005
Of pNGB QuiNtessence
Nemanja Kaloper, Lorenzo Sorbo
We review the pNGB quintessence models, and point out that the reason why the large decay constants $f_a \ga {\cal O}(1)M_{Pl}$ are really needed is to tame a tachyonic instability…
hep-th2004
Origami World
Nemanja Kaloper
We paste together patches of to find solutions which describe two 4-branes intersecting on a 3-brane with non-zero tension. We construct explicitly brane arrays with Minkow…