Loss of entanglement in quantum mechanics due to the use of realistic measuring rods

Understand

We show that the use of real measuring rods in quantum mechanics places a fundamental gravitational limit to the level of entanglement that one can ultimately achieve in quantum systems.

• The result can be seen as a direct consequence of the fundamental gravitational limitations in the measurements of length and time in realistic physical systems.
• The effect may have implications for long distance teleportation and the measurement problem in quantum mechanics.