Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session Z04: Searches for Dark Matter and Dark Energy
10:30 AM–12:18 PM,
Friday, June 4, 2021
Co-Sponsoring
Unit:
GPMFC
Chair: Derek Kimball, California State University, East Bay
Abstract: Z04.00003 : Status of CASPEr-gradient and latest spin-noise measurement results*
10:54 AM–11:06 AM
Live
Presenter:
anam toaha
(Johannes Gutenberg University of Mainz)
Authors:
anam toaha
(Johannes Gutenberg University of Mainz)
Janos Adam
(Boston University)
Samer Afach-Johannes
(Gutenberg University of Mainz)
Deniz Aybas
(Boston University)
Hendrik Bekker
(Columbia University)
John Blanchard
(Johannes Gutenberg University)
Emmy Blumenthal
(Boston University)
Dmitry Budker
(Johannes Gutenberg University and UC Berkeley)
Gary Centres
(Gutenberg University of Mainz)
Martin Engler
(Johannes Gutenberg University of Mainz)
Nataniel L Figueroa
(Johannes Gutenberg University of Mainz)
Antoine Garcon
(Johannes Gutenberg University of Mainz)
Peter Graham
(Stanford University)
Alexander Gramolin
(Boston University)
Doriah Johnson
(Boston University)
Derek Jackson-Kimball
(California State University-East Bay)
Annalies M Kleyheeg
(Boston University)
Matthew Lawson
(Stanford University)
Haosu Luo
(Shanghai Institute of Ceramics, Chinese Academy of Sciences)
Philip Mauskopf
(Arizona State University)
Surjeet Rajendran
(John Hopkins Krieger School of Arts and Sciences)
Alexander Sushkov
(Boston University)
Tao Wang
(Princeton University)
Arne Wickenbrock
(Johannes Gutenberg University)
Antoine Garcon, Peter W. Graham, Alexander V. Gramolin, Dorian Johnson, Derek F. Jackson Kimball, Annalies Kleyheeg, Matthew Lawson, Haosu Luo, Hamdi Mani,
Philip Mauskopf, Surjeet Rajendran, Marina Gil Sendra, Alexander O. Sushkov, Anam Toaha, Tao Wang, Arne Wickenbrock, Teng Wu and Yuzhe Zhang
The cosmic axion spin precession experiment (CASPEr) is a nuclear magnetic resonance experiment to search for axion and axion-like particles which could make up the dark
matter present in the universe. The discovery of dark matter would be a breakthrough in particle physics, astrophysics and cosmology. Due to the pseudoscalar nature and light mass of axions they can be treated as a field that can exert a time-varying torque on nuclear spins either directly or through the generation of an oscillating nuclear electric dipole moment.
In CASPEr-grad, a sample of nuclear spins is placed in a magnetic field which is tunable to a wide range of Larmor frequencies. When the Larmor frequency approaches the Compton frequency of the axion, a magnetization will build up which we intend to detect using superconducting quantum interference device (SQUIDs). We are currently characterizing the performance of the setup and investigating nuclear spin-projection noise. Our aim is to determine the spin-noise spectra of different molecular species and we will show the current state of this part of the experiment.
*Supported in part by the Cluster of Excellence PRISMA+ funded by the German Research Foundation (DFG) within German Excellence Strategy (Project ID39083149),by the European Research Council (ERC) under the Europeon Union Horizon 2020 research and innovation program (project Dark-OST, grant agreement No.695405), by the DFG Reinhart Koselleck project and by the German Fedral Ministry of Education and Research (BMBF) within Quantumtechnologien program (FKZ 13N15064)
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