Spontaneous emission of graviton by a quantum bouncer

The Polymer Bouncer

Polymer Quantization (PQ) is a background independent quantization scheme that is deployed in Loop Quantum Gravity. This framework leads to a new short-distance (discretized) structure characterized by a fundamental length. In this paper we use PQ to analyze the problem of a particle bouncing on a perfectly reflecting surface under the influence of Earth's gravitational field, what we have called "\textit{The Polymer Bouncer}". In this scenario, deviations from the usual quantum effects are induced by the spatial discreteness, but not by a new short-range gravitational interaction. We solve th…

High frequency background gravitational waves from spontaneous emission of gravitons by hydrogen and helium

A direct consequence of quantization of gravity would be the existence of gravitons. Therefore, spontaneous transition of an atom from an excited state to a lower-lying energy state accompanied with the emission of a graviton is expected. In this paper, we take the gravitons emitted by hydrogen and helium in the Universe after recombination as a possible source of high frequency background gravitational waves, and calculate the energy density spectrum. Explicit calculations show that the most prominent contribution comes from the $3d-1s$ transition of singly ionized helium $\mathrm{He}^{+}$, w…

环境崩溃模型

Environmental Collapse Models

环境崩溃模型通过光子和引力子的崩溃影响重系统，预测宏观系统快速崩溃，解决量子测量问题。

Aspects of Graviton Detection: Graviton Emission and Absorption by Atomic Hydrogen

Graviton absorption cross sections and emission rates for hydrogen are calculated by both semi-classical and field theoretic methods. We point out several mistakes in the literature concerning spontaneous emission of gravitons and related phenomena, some of which are due to a subtle issue concerning gauge invariance of the linearized interaction Hamiltonian.

塌缩模型的微观起源：从引力辐射的去相干

Microscopic Origins of Collapse Models: Decoherence from Graviton Bremsstrahlung

本文通过量子玻尔兹曼方程分析费米子在空间叠加态下的行为，提出引力耦合与质量影响去相干率的定量关系，为理解引力诱导去相干提供框架，并探讨其对实验验证的意义。

利用量子传感探测单个引力子

Detecting single gravitons with quantum sensing

本文提出利用大规模量子声学谐振器探测单引力子交换，证明受激吸收可通过量子跃迁连续传感分辨，表明单引力子特征已处于实验可及范围，有望为引力量子化提供首个实验证据。