|Boris the halfling|
Quote:Dimensional Slide (Su) (Advanced Class Guide pg. 11): The arcanist can expend 1 point from her arcane reservoir to create a dimensional crack that she can step through to reach another location. This ability is used as part of a move action or withdraw action, allowing her to move up to 10 feet per arcanist level to any location she can see. This counts as 5 feet of movement. She can only use this ability once per round. She does not provoke attacks of opportunity when moving in this way, but any other movement she attempts as part of her move action provokes as normal.
The ability doesn't address what you can carry with you when stepping through your dimensional crack, so there is no hard official answer. I'd suggest you can carry anything you can move with you. But others will suggest you can't bring any other creatures with you, because it doesn't mention bringing others. But then others still will mention that it doesn't say you can bring your equipment with you either.
So, you'll just have to ask your DM. Personally, I don't see it being very powerful to allow you to give short range dimensional piggy back rides, so I don't know why you wouldn't allow the arcanist to carry passengers.
I am completely ok with it, just got caught in that game situation as a player and couldn't find any official rules.