TY - JOUR
AU - Robert Delaney
AU - A. Reed
AU - R. Andrews
AU - Konrad Lehnert
AB - Through simultaneous but unequal electromechanical amplification and cooling processes, we create a method for a nearly noiseless pulsed measurement of mechanical motion. We use transient electromechanical amplification (TEA) to monitor a single motional quadrature with a total added noise -8.5 ± 2.0  dB relative to the zero-point motion of the oscillator, or equivalently the quantum limit for simultaneous measurement of both mechanical quadratures. We demonstrate that TEA can be used to resolve fine structure in the phase space of a mechanical oscillator by tomographically reconstructing the density matrix of a squeezed state of motion. Without any inference or subtraction of noise, we directly observe a squeezed variance 2.8 ± 0.3  dB below the oscillator's zero-point motion.
BT - Physical Review Letters
DA - 2019-10
DO - 10.1103/PhysRevLett.123.183603
N2 - Through simultaneous but unequal electromechanical amplification and cooling processes, we create a method for a nearly noiseless pulsed measurement of mechanical motion. We use transient electromechanical amplification (TEA) to monitor a single motional quadrature with a total added noise -8.5 ± 2.0  dB relative to the zero-point motion of the oscillator, or equivalently the quantum limit for simultaneous measurement of both mechanical quadratures. We demonstrate that TEA can be used to resolve fine structure in the phase space of a mechanical oscillator by tomographically reconstructing the density matrix of a squeezed state of motion. Without any inference or subtraction of noise, we directly observe a squeezed variance 2.8 ± 0.3  dB below the oscillator's zero-point motion.
PY - 2019
EP - 183603
T2 - Physical Review Letters
TI - Measurement of Motion beyond the Quantum Limit by Transient Amplification
UR - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.183603
VL - 123
SN - 0031-9007
ER -