



01241nas a2200157   4500008004100000245005800041210005800099260001500157300001100172490000700183520080300190100001400993700002001007700001901027856003701046       2015                        eng d00aBounds on quantum communication via Newtonian gravity0 aBounds on quantum communication via Newtonian gravity  c2015/01/15  a0150060 v173 aNewtonian gravity yields specific observable consequences, the most striking of which is the emergence of a $1/r^2$ force. In so far as communication can arise via such interactions between distant particles, we can ask what would be expected for a theory of gravity that only allows classical communication. Many heuristic suggestions for gravity-induced decoherence have this restriction implicitly or explicitly in their construction. Here we show that communication via a $1/r^2$ force has a minimum noise induced in the system when the communication cannot convey quantum information, in a continuous time analogue to Bell's inequalities. Our derived noise bounds provide tight constraints from current experimental results on any theory of gravity that does not allow quantum communication.
1 aKafri, D.1 aMilburn, G., J.1 aTaylor, J., M.  uhttp://arxiv.org/abs/1404.3214v2