Space-like Separation in a Bell Test assuming Gravitationally Induced Collapses

TL;DR

This paper reports a Bell test experiment with space-like separation, assuming gravity-induced state reduction, using entangled photons and macroscopic mass displacement to explore quantum nonlocality under gravitational effects.

Contribution

It introduces an experimental setup testing Bell inequalities with gravitationally induced collapse assumptions, combining quantum entanglement with macroscopic mass displacement.

Findings

Achieved 90.5% interference fringe visibility.

Violates Bell inequality under gravitational collapse assumptions.

Demonstrates feasibility of space-like separated measurements with macroscopic components.

Abstract

We report on a Bell experiment with space-like separation assuming that the measurement time is related to gravity-induced state reduction. Two energy-time entangled photons are sent through optical fibers and directed into unbalanced interferometers at two receiving stations separated by 18 km. At each station, the detection of a photon triggers the displacement of a macroscopic mass. The timing ensures space-like separation from the moment a photon enters its interferometer until the mass has moved. 2-photon interference fringes with a visibility of up to 90.5% are obtained, leading to a violation of Bell inequality.