10 research outputs found
Attaining the shot-noise-limit in the ACME measurement of the electron electric dipole moment
Experimental searches for the electron electric dipole moment, , probe
new physics beyond the Standard Model. Recently, the ACME Collaboration set a
new limit of [Nature
, 355 (2018)], constraining time reversal symmetry (T) violating
physics in the 3-100 TeV energy scale. ACME extracts from the measurement
of electron spin precession due to the thorium monoxide (ThO) molecule's
internal electric field. This recent ACME II measurement achieved an order of
magnitude increased sensitivity over ACME I by reducing both statistical and
systematic uncertainties in the measurement of the electric dipole precession
frequency. The ACME II statistical uncertainty was a factor of 1.7 above the
ideal shot-noise limit. We have since traced this excess noise to timing
imperfections. When the experimental imperfections are eliminated, we show that
shot noise limit is attained by acquiring noise-free data in the same
configuration as ACME II.Comment: 7 pages, 4 figure
New Horizons: Scalar and Vector Ultralight Dark Matter
The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight (eV) bosonic dark matter that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches for wavelike scalar and vector dark matter candidates.The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight (eV) bosonic dark matter that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches for wavelike scalar and vector dark matter candidates