Longhi S
Opt Lett. 2018 Jan 15;43(2):226-229. doi: 10.1364/OL.43.000226.
Einstein's equivalence principle (EP) states the complete physical equivalence of a gravitational field and corresponding inertial field in an accelerated reference frame. However, to what extent the EP remains valid in non-relativistic quantum mechanics is a controversial issue. To avoid violation of the EP, Bargmann's superselection rule forbids a coherent superposition of states with different masses. Here we suggest a quantum simulation of non-relativistic Schrödinger particle dynamics in non-inertial reference frames, which is based on the propagation of polarization-entangled photon pairs in curved and birefringent optical waveguides and Hong-Ou-Mandel quantum interference measurement. The photonic simulator can emulate superposition of mass states, which would lead to violation of the EP.
爱因斯坦等效原理（EP）指出，在加速参考系中，引力场与相应的惯性场在物理上完全等效。然而，等效原理在非相对论量子力学中在多大程度上仍然有效是一个有争议的问题。为避免违反等效原理，巴格曼超选择规则禁止具有不同质量的态的相干叠加。在此，我们提出一种在非惯性参考系中对非相对论薛定谔粒子动力学进行量子模拟的方法，该方法基于偏振纠缠光子对在弯曲和双折射光波导中的传播以及洪-欧-曼德尔量子干涉测量。光子模拟器可以模拟质量态的叠加，这将导致违反等效原理。
