Abstract
Squeezing is a resource that enables precision enhancements in quantum metrology and can be used as a basis for the generation of entanglement by linear optics. While strong squeezing is challenging to generate in optical fields, here we present simple periodic modulation protocols in optomechanical systems that can generate large squeezing of their mechanical degrees of freedom for realistic system parameters. We then proceed to show how such protocols can serve to improve the measurement precision of weak forces and enhance the generation of entanglement between test masses that are subject to any kind of weak interaction. Moreover, these protocols can be reverted to reduce the amount of injected energy, while preserving the generated entanglement and making it more resilient to noise. We present the principle at work, discuss its application in a variety of physical settings, including levitated and tethered mechanical harmonic oscillators, and present example applications to Casimir and gravitational forces.
Original language | English |
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Article number | L061501 |
Number of pages | 6 |
Journal | Physical Review A |
Volume | 103 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2021 |
MoE publication type | A1 Journal article-refereed |
Funding
We acknowledge support by the ERC Synergy grant HyperQ (Grant No. 856432), the EU projects HYPERDIAMOND (Grant No. 667192) and AsteriQs (Grant No. 820394), the QuantERA project NanoSpin, the BMBF project DiaPol, the state of Baden-Württemberg through bwHPC, the German Research Foundation (DFG) through Grant No. INST 40/467-1 FUGG, and the Alexander von Humboldt Foundation through a postdoctoral fellowship.