  Bound quantum mechanical systems not expanding with the comoving frame of an
expanding, flat FRW metric are found to release energy at a rate linearly
proportional to the local Hubble constant ($H_{o}$) and the systems' binding
energy ($E_{b}$); {\em i.e.}, $\dot{E} = H_{o} E_{b}$. Three exemplary quantum
systems are examined. For systems with early cosmological condensation times |
notably hadrons | time-integrated energy release could have been significant
and could account for an appreciable fraction of the dark matter inventory.
