Generation of Einstein-Podolsky-Rosen State via Earth's Gravitational Field

TL;DR

This paper proposes a practical method to generate entangled neutron pairs using Earth's gravity, enabling tests of quantum nonlocality in a gravitational context with current technology.

Contribution

It introduces a novel scheme for gravitationally induced neutron entanglement, bridging quantum mechanics and gravity experimentally.

Findings

Feasible generation of entangled neutron pairs every few seconds.

Utilizes Earth's gravitational field to induce entanglement.

Provides a practical setup for testing quantum nonlocality in gravity.

Abstract

Although various physical systems have been explored to produce entangled states involving electromagnetic, strong, and weak interactions, the gravity has not yet been touched in practical entanglement generation. Here, we propose an experimentally feasible scheme for generating spin entangled neutron pairs via the Earth's gravitational field, whose productivity can be one pair in every few seconds with the current technology. The scheme is realized by passing two neutrons through a specific rectangular cavity, where the gravity adjusts the neutrons into entangled state. This provides a simple and practical way for the implementation of the test of quantum nonlocality and statistics in gravitational field.