TY - JOUR
AU - M. Malnou
AU - Daniel Palken
AU - Benjamin Brubaker
AU - Leila Vale
AU - Gene Hilton
AU - Konrad Lehnert
AB - Many experiments that interrogate fundamental theories require detectors whose sensitivities are limited by the laws of quantum mechanics. In cavity-based searches for axionic dark matter, vacuum fluctuations in the two quadratures of the cavity electromagnetic field limit the sensitivity to an axion-induced field. In an apparatus designed to partially mimic existing axion detectors, we demonstrate experimentally that such quantum limits can be overcome through the use of squeezed states. By preparing a microwave cavity in a squeezed state and measuring just the squeezed quadrature, we enhance the spectral scan rate by a factor of 2.12 ± 0.08. This enhancement is in excellent quantitative agreement with a theoretical model accounting for both imperfect squeezing and measurement.
BT - Physical Review X
DA - 2019-05
DO - 10.1103/PhysRevX.9.021023
N2 - Many experiments that interrogate fundamental theories require detectors whose sensitivities are limited by the laws of quantum mechanics. In cavity-based searches for axionic dark matter, vacuum fluctuations in the two quadratures of the cavity electromagnetic field limit the sensitivity to an axion-induced field. In an apparatus designed to partially mimic existing axion detectors, we demonstrate experimentally that such quantum limits can be overcome through the use of squeezed states. By preparing a microwave cavity in a squeezed state and measuring just the squeezed quadrature, we enhance the spectral scan rate by a factor of 2.12 ± 0.08. This enhancement is in excellent quantitative agreement with a theoretical model accounting for both imperfect squeezing and measurement.
PY - 2019
EP - 021023
T2 - Physical Review X
TI - Squeezed Vacuum Used to Accelerate the Search for a Weak Classical Signal
UR - https://journals.aps.org/prx/abstract/10.1103/PhysRevX.9.021023
VL - 9
ER -