Quantum backaction evading measurements of a silicon nitride membrane resonator

• URL: http://arxiv.org/abs/2201.11041v1
• Date: Wed, 26 Jan 2022 16:29:57 GMT
• Title: Quantum backaction evading measurements of a silicon nitride membrane resonator
• Authors: Yulong Liu, Jingwei Zhou, Laure Mercier de L\'epinay, and Mika A. Sillanp\"a\"a
• Abstract summary: Quantum backaction noise can be evaded in the quadrature measurement of the motion of a large object. Measurement shows that quantum backaction noise can be evaded in the quadrature measurement of the motion of a large object.
• Score: 2.2049183478692584
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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