Conveners
Poster Session: Experimental - Work towards long baseline AIs
- There are no conveners in this block
Poster Session: Experimental - Tabletop experiments i.e. fountains. Gyroscopes, gravimeters etc. most probing fundamental physics
- There are no conveners in this block
Poster Session: Theory/Simulations/HEP
- Marilu Chiofalo (University of Pisa)
- Elina Fuchs (CERN)
- Oliver Buchmuller (Imperial College (GB))
Long baseline atom interferometers offer an exciting opportunity to explore mid-frequency gravitational waves. In this work we survey the landscape of possible contributions to the total `gravitational wave background' in this frequency band and advocate for targeting this observable. Such an approach is complimentary to searches for resolved mergers from individual sources and may have much...
Atom interferometry provides a powerful tool to probe fundamental physics due to its incredible sensitivity to changes in local gravitational potential and atomic transition energies. New compact atom interferometry experiments such as AION-10 hope to constrain the presence of small oscillating signals from scalar ultra-light dark matter and other new physics by taking measurements over a long...
We propose a laboratory experiment to detect the fifth force mediated by a new light scalar field. The symmetron is a light scalar field which couples quadratically to matter, with a symmetry-breaking potential that takes the form of a symmetric double-well. As the characteristic phase transition of the symmetron field occurs, topological defects or 'domain walls' can form. It is hoped that by...
The search for violations of the Einstein equivalence principle and dark matter is a driving force for atom interferometery. A scalar, light dilaton field constitutes such a basic but consistent extension to known physics. While recent works focus on the coupling of matter to gravity and dilaton fields, we include the propagation of the light essential to manipulate the atoms. In particular,...
Are top sensitivity Sagnac gyroscopes suitable to fundamental physics tests?
Precision measurements of the Earth rotation make it possible to investigate fundamental physics, as they contain general relativity terms, such as de Sitter and Lense Thirring, and can provide unique data to investigate possible Lorentz violations. These measurements require high sensitivity, usually...
MAGIS-100 is a strontium atom interferometer with a baseline of 100 m under construction at Fermilab that aims to explore fundamental physics. AION is a UK initiative to develop this technology further. AION project has established five strontium atom interferometry laboratories nationwide, and a 10 m prototype is planned. Both projects will search for the ultralight dark matter fields and...
Metric descriptions of gravitation, among them general relativity as today’s established theory, are founded on assumptions summarized in the Einstein equivalence principle (EEP). Its violation would hint at unknown physics and could be a leverage for the development of quantum gravity. Atomic clocks are excellent systems to probe aspects of EEP connected to (proper) time and have evolved into...
A Cesium (Cs) Bose-Einstein Condensate in an optical trap with the magnetic field as free tuning parameter offers exciting possibilities including tunable matter-wave interferometry which is planned to perform using optical double-well potential. The scattering length of Cs can be controlled using Feshbach coils in the practical range of magnetic field numbers for tuning the atom-atom...
Rubidium-85 Interferometry at the University of Liverpool: A previously decommissioned frequency standard fountain, repurposed for atom interferometry at the National Physical Laboratory with the University of Liverpool, has been relocated to Liverpool and is currently being prepared for an upgraded laser system. The device will serve as a prototype detector to test for fundamental physics...
"AION (Atom Interferometer Observatory and Network) and MAGIS (Matter-wave Atomic Gradiometer Interferometric Sensor) are experiments utilising strontium atoms to search for ultra-light dark matter and mid-band gravitational waves. Both experiments have embarked on building a series of atom interferometers ranging from 10 m to 1 km baselines, with MAGIS currently constructing the 100 m...
"Based on our previous work, we evaluate the possibility of implementing
and testing quantum walk algorithms and quantum neural network algorithms
using as hardware the optical lattice made by interfering cold atoms.
Recent evidence for the implementation of qubit gates using atomic
interferometry opens the possibility to address the qubit-environment
interaction noise problem that we...
Towards a levitated atom interferometer with potassium Matthias Kolb*a, Thomas Weigner a, Samuel Rind a, Thomas Spielauer a, Philipp Haslinger a a Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria * matthias.kolb@tuwien.ac.at We develop a setup suitable for cavity-enhanced levitated atom interferometry, which is capable of very long...
Nowadays, matter-wave interferometry has become a powerful technique for measuring acceleration, gravity gradient, and constant rotation with enormous precision. Here, we explore an atom interferometer which is highly sensitive to unknown constant angular acceleration. By modeling rotation with fixed axis and constant angular acceleration, we employ atom-interferometric scheme based on a...
There are a number of models that aim to reconcile the observed accelerating expansion of the universe with our current understanding of general relativity. One interesting model proposes the existence of a scalar field that is screened in regions of high matter density and can therefore go unnoticed in experiments performed on Earth – colloquially referred to as the ‘chameleon field’.
In...
Title: High-precision atom interferometer GAIN
Authors: B. Leykauf, H.Thaivalappil Sunilkumar, V. Schkolnik, and A. Peters
The atom interferometer GAIN uses interfering ensembles of laser-cooled Rb-87 atoms in a fountain setup to precisely and accurately measure local gravity. Our instrument’s performance was compared to falling corner-cube and superconducting gravimeters during several...
The 15m high Very Long Baseline Atom Interferometry (VLBAI) facility
in Hannover, Germany, aims for sub nm/s^2 gravity measurement sensitivities. Using light-pulse atom interferometry, the VLBAI facility enables to perform accurate measurements of inertial effects thus making it a useful device for metrology and tests of fundamental physics. The sensitivity of light-pulse atom interferometers...
Gravimeters based on atom interferometry not only offer the ability to measure the value of local acceleration g with high accuracy but also help validate highly relevant principles such as the Weak Equivalence Principle. Broadly speaking, the implementation of such a device comprises the following steps: Preparation of the atoms in a defined state, splitting and recombining the wave atomic...
Many quantum optics experiment, including but not limited to large-baseline atom interferometers, require a mechanically robust optical distribution system. Particularly for space-based missions, such as MAGIS Space or AEDGE, compactness also plays a crucial role.
We have developed an optical bench technology that is both compact and exhibits a high mechanical stability when exposed to...
We investigate the strength and linewidth of a transition between two RF-Dressed ground
states for Rubidium-87 in a non-uniform magnetic field. The linewidth of the selected transition
is broadened due to a mismatch of trapping potentials. This arises from a difference in Land´e
g-factor magnitude between the two hyperfine ground states. A scheme is presented wherein the
magnetic field...
We analyze the possibility of the leptonic mixing matrix having a Wolfenstein form at the Grand Unified Theory scale. The renormalization group evolution of masses and mixing angles from the high scale to electroweak scale, in certain new physics scenarios, can significantly alter the form of the leptonic mixing matrix. In the past it as shown that such significant enhancement implies that the...
The Atom Interferometer Observatory and Network (AION) project aims to develop a next-generation differential atom interferometer for the detection of ultra-light dark matter and mid-frequency range gravitational waves, complementing the peak sensitivities of other experiments i.e., LISA, LIGO, and Virgo. The project is comprised of various stages, starting with a 10 m baseline atom...
Multi-messenger studies involving Gravitational Waves
1,2F.C. Pîslan, 1L.I. Caramete, 1A. Caramete
1 Institute of Space Science, Romania
2 Faculty of Physics, University of Bucharest, Romania
Recently, with the first discovery of gravitational waves, the multi-messenger studies involving observations on the same astrophysical event with photons, neutrinos and gravitational waves...
In matter wave lensing magnetic and optical harmonic potentials are used to collimate and focus matter waves. One of its key applications which I am interested in is atom lithography. By phase imprinting a design on these harmonic potentials, it can be transferred to the trapped atoms. With matter wave lensing we get a real time control of the size of these patterns which can be transferred...
I will report an atom interferometer based on quasi-Bragg diffraction in a fountain of 87-rubidium Bose-Einstein Condensate. We demonstrated interferometers with momentum transfers to the atoms up to 200 photon recoils. We investigated the limitations of the beam splitters due to, spontaneous emission and the limited efficiency of the quasi-Bragg diffraction. In particular, we propose a...
We present a recent progress towards experiments with hydrogen atoms at ultra-low energies, nearly at rest planned by an international collaboration GRASIAN* (Gravity, Spectroscopy and Interferometry with Atoms and Neutrons, https://grasian.eu/). We will probe the ultralow-energy domain with hydrogen, the lightest and simplest of neutral atoms, which has served as a test probe of the...
Simulating space-borne atom interferometers for Earth Observation and tests of General Relativity
Christian Struckmann, Ernst M. Rasel, Peter Wolf, Naceur Gaaloul
Quantum sensors based on the interference of matter waves provide an exceptional performance to test the postulates of General Relativity by comparing the free-fall acceleration of matter waves of different composition....
The Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100) is a 100m vertical baseline detector under construction at Fermilab. It works closely with the Atom Interferometry Observatory Network (AION), a UK-based program with the initial goal of constructing a 10m detector. Both programs will use the latest strontium atomic interferometry techniques to search for dark matter, test...
We present the status of our optical frequency reference based on Ramsey-Bord{\'e} interferometry using the $^1$S$_0$ $\rightarrow$ $^3$P$_1$ intercombination line in strontium. Next to the current state of the atom interferometer based on a thermal atomic beam, we will present details of our compact and high-flux atomic oven, the cavity-stabilised laser system at $689$~nm and outline the...
Contemporary atomic clocks and atom interferometers provide measurements of frequency and gravity with unprecedented precision. Atom interferometers based on the intercombination transitions of alkaline-earth and alkaline-earth-like atoms operate at the intersection of these two devices and represent an emerging technology with a broad range of applications for fundamental physics tests. Here,...
We present a systematic approach to calculate all relativistic phase shift effects in Bragg-type light-pulse matter wave interferometer (MWI) experiments up to (and including) order 𝒪(𝑐−2), placed in a weak gravitational field. The whole analysis is derived from first principles and even admits test of General Relativity (GR) apart from the usual Einstein Equivalence Principle (EEP) tests,...
