An Atomic Gravitational Wave Interferometric Sensor (AGIS)

UGR tests with atomic clocks and atom interferometers

Atomic interference experiments test the universality of the coupling between matter-energy and gravity at different spacetime points, thus being in principle able to probe possible violations of the universality of the gravitational redshift (UGR). In this contribution, we introduce a UGR violation model and then discuss UGR tests performed by atomic clocks and atom interferometers on the same footing. We present a large class of atom-interferometric geometries which are sensitive to violations of UGR.

Using Atomic Clocks to Detect Gravitational Waves

Atomic clocks have recently reached a fractional timing precision of $<10^{-18}$. We point out that an array of atomic clocks, distributed along the Earth's orbit around the Sun, will have the sensitivity needed to detect the time dilation effect of mHz gravitational waves (GWs), such as those emitted by supermassive black hole binaries at cosmological distances. Simultaneous measurement of clock-rates at different phases of a passing GW provides an attractive alternative to the interferometric detection of temporal variations in distance between test masses separated by less than a GW wavelen…

Gravitational wave detection with optical lattice atomic clocks

We propose a space-based gravitational wave detector consisting of two spatially separated, drag-free satellites sharing ultra-stable optical laser light over a single baseline. Each satellite contains an optical lattice atomic clock, which serves as a sensitive, narrowband detector of the local frequency of the shared laser light. A synchronized two-clock comparison between the satellites will be sensitive to the effective Doppler shifts induced by incident gravitational waves (GWs) at a level competitive with other proposed space-based GW detectors, while providing complementary features. Th…

Gravitational time dilation as a resource in quantum sensing

Atomic clock interferometers are a valuable tool to test the interface between quantum theory and gravity, in particular via the measurement of gravitational time dilation in the quantum regime. Here, we investigate whether gravitational time dilation may be also used as a resource in quantum information theory. In particular, we show that for a freely falling interferometer and for a Mach-Zehnder interferometer, the gravitational time dilation may enhance the precision in estimating the gravitational acceleration for long interferometric times. To this aim, the interferometric measurements sh…

用长基线原子干涉仪测试超对称隐藏扇区

Testing Supersymmetric Hidden Sectors with Long-Baseline Atom Interferometers

提出长基线原子干涉仪可探测超对称隐藏扇区中的超轻模量、膨胀子或隐藏标量，通过相干相位振荡约束有效标量耦合，并映射到超对称规范动能函数等参数，为超对称和弦理论红外遗迹提供非对撞机探针。

ELGAR -- a European Laboratory for Gravitation and Atom-interferometric Research

Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend the detection bandwidth to low frequency. The scientific potential of multi-frequency GW astronomy is enormous as it would enable to obtain a more complete picture of cosmic events and mechanisms. This is a unique and entirely new opportunity for the future of astronomy, the success of which depends upon the decisions being made on existing and new infrastructures. The prospect of combining observations from the future space-based ins…

长基线原子干涉仪对大规模引力子暗物质的搜寻

Massive graviton dark matter searches with long-baseline atom interferometers

本文研究原子干涉仪对自旋-2超轻暗物质的探测灵敏度，涵盖Fierz-Pauli及洛伦兹破缺框架，通过标量、矢量、张量耦合产生相移，开辟暗物质探测新前沿。

A Resonant Mode for Gravitational Wave Detectors based on Atom Interferometry

We describe an atom interferometric gravitational wave detector design that can operate in a resonant mode for increased sensitivity. By oscillating the positions of the atomic wavepackets, this resonant detection mode allows for coherently enhanced, narrow-band sensitivity at target frequencies. The proposed detector is flexible and can be rapidly switched between broadband and narrow-band detection modes. For instance, a binary discovered in broadband mode can subsequently be studied further as the inspiral evolves by using a tailored narrow-band detector response. In addition to functioning…

Modeling the Impulsive Noise Component and its Effect on the Operation of a Simple Coherent Network Algorithm for Unmodeled Gravitational Wave Bursts Detection

An analytic model a la Middleton of the impulsive noise component in the data of interferometric gravitational wave detectors is proposed, based on an atomic representation of glitches. A fully analytic characterization of the coherent network data analysis algorithm proposed by Rakhmanov and Klimenko is obtained, for the simplest relevant case of triggered detection of unmodeled gravitational wave bursts, using the above noise model. The detector's performance is evaluated under a suitable central-limit hypothesis, and the effects of both the noisiness of the pseudo-templates, and the presenc…

光子干涉测量中的光谱增强引力红移信号

Spectrally enhanced gravitational redshift signals in photonic interferometry

本文提出将光子干涉仪臂耦合到超窄原子跃迁光学散射体的光谱增强策略，可在厘米级高度差下产生显著引力红移信号，为桌面光学检验量子力学与广义相对论的相互作用提供了可行途径。