2013
DOI: 10.1103/physrevlett.110.184301
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Strong Thermomechanical Squeezing via Weak Measurement

Abstract: We experimentally surpass the 3 dB limit to steady-state parametric squeezing of a mechanical oscillator. The localization of an atomic force microscope cantilever, achieved by optimal estimation, is enhanced by up to 6.2 dB in one position quadrature when a detuned parametric drive is used. This squeezing is, in principle, limited only by the oscillator Q factor. Used on low temperature, high frequency oscillators, this technique provides a pathway to achieve robust quantum squeezing below the zero-point moti… Show more

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Cited by 124 publications
(122 citation statements)
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References 28 publications
(49 reference statements)
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“…Detecting a weak stochastic signal on a stronger background is an important task in the research field of quantum mechanics with macroscopic oscillators, in particular when exploring the properties of oscillators with low occupation number, or, e.g., in a squeezed state [16,[24][25][26] or other peculiarly quantum states. In this situation, the measurement back-action can destroy the interesting features.…”
Section: Discussionmentioning
confidence: 99%
“…Detecting a weak stochastic signal on a stronger background is an important task in the research field of quantum mechanics with macroscopic oscillators, in particular when exploring the properties of oscillators with low occupation number, or, e.g., in a squeezed state [16,[24][25][26] or other peculiarly quantum states. In this situation, the measurement back-action can destroy the interesting features.…”
Section: Discussionmentioning
confidence: 99%
“…While sideband cooling has led to occupations of less than one phonon in recent years [56,10], nonlinearities and heating tend to prevent the phonon occupation from dropping far below 1, making quantum squeezing via parametric techniques difficult. There are many theoretical proposals for surpassing the 3 dB limit to produce quantum squeezing [44,48,14,68,27,34,54,57,23,5,33], and improvement over the 3 dB limit has been realized experimentally with modified parametric techniques [53,58,42]. Squeezing below the zero-point fluctuations, however, has yet to be achieved.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, it is, in principle, impossible to have a steady state where the mechanical motion is squeezed below one half of the zero-point level using only parametric driving. These limitations may be overcome by combining continuous quantum measurement and feedback [9][10][11][12], but it would substantially increase the experimental complexity.Another method to generate a robust quantum state is quantum reservoir engineering [13], which has been used to generate quantum squeezed states and entanglement with trapped ions [14,15] and superconducting qubits [16]. It can also be applied to an optomechanical system to generate strong steady-state squeezing without quantumlimited measurement and feedback [17].…”
mentioning
confidence: 99%
“…Therefore, it is, in principle, impossible to have a steady state where the mechanical motion is squeezed below one half of the zero-point level using only parametric driving. These limitations may be overcome by combining continuous quantum measurement and feedback [9][10][11][12], but it would substantially increase the experimental complexity.…”
mentioning
confidence: 99%