|Title||Bounds on quantum communication via Newtonian gravity|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||Kafri, D, Milburn, GJ, Taylor, JM|
|Journal||New Journal of Physics|
Newtonian 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.
|Short Title||New J. Phys.|