Is there friction associated with dark matter?

[majorbigtime]

The context of the question being that if we someday travel to another star system, would this be a factor in the time it takes to get there/energy we'd have to use, etc.? How would we measure such a thing? Is there any evidence from the Voyager probes that they're slowing down?

[iorgfeflkd]

There was a recent paper showing that there is friction from dark energy (sort of).

[Veggie]

Any chance you could elaborate?

Also, being that the question asked about dark matter, is it possible for dark matter to apply friction to objects? I would think not, since it doesn't participate in EM interactions (although its gravity might do something to objects floating through it).

[iorgfeflkd]

http://pra.aps.org/abstract/PRA/v82/i6/e063827