Noiseless Quantum Measurement and Squeezing of Microwave Fields Utilizing Mechanical Vibrations

Caspar Ockeloen-Korppi, Erno Damskägg, Juha-Matti Pirkkalainen, Tero Heikkilä, Francesco Massel, Mika Sillanpää

Research output: Contribution to journalArticleScientificpeer-review

35 Citations (Scopus)
279 Downloads (Pure)


A process which strongly amplifies both quadrature amplitudes of an oscillatory signal necessarily adds noise. Alternatively, if the information in one quadrature is lost in phase-sensitive amplification, it is possible to completely reconstruct the other quadrature. Here we demonstrate such a nearly perfect phase-sensitive measurement using a cavity optomechanical scheme, characterized by an extremely small noise less than 0.2 quanta. The device also strongly squeezes microwave radiation by 8 dB below vacuum. A source of bright squeezed microwaves opens up applications in manipulations of quantum systems, and noiseless amplification can be used even at modest cryogenic temperatures.

Original languageEnglish
Article number103601
Pages (from-to)1-5
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 6 Mar 2017
MoE publication typeA1 Journal article-refereed

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