Quantum backaction evading measurements of a silicon nitride membrane resonator

Yulong Liu, Jingwei Zhou, Laure Mercier De Lépinay, Mika A. Sillanpää

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Quantum backaction disturbs the measurement of the position of a mechanical oscillator by introducing additional fluctuations. In a quantum backaction measurement technique, the backaction can be evaded, although at the cost of losing part of the information. In this work, we carry out such a quantum backaction measurement using a large 0.5 mm diameter silicon nitride membrane oscillator with 707 kHz frequency, via a microwave cavity readout. The measurement shows that quantum backaction noise can be evaded in the quadrature measurement of the motion of a large object.

Original languageEnglish
Article number083043
JournalNew Journal of Physics
Issue number8
Publication statusPublished - 1 Aug 2022
Externally publishedYes


  • micromechanics
  • optomechanics
  • quantum measurement

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Quantum backaction evading measurements of a silicon nitride membrane resonator'. Together they form a unique fingerprint.

Cite this