Displacement detection with a vibrating rf superconducting interference device: beating the standard linear limit.

Citation data:

Physical review. E, Statistical, nonlinear, and soft matter physics, ISSN: 1539-3755, Vol: 76, Issue: 2 Pt 2, Page: 026217

Publication Year:
2007
Usage 7
Abstract Views 7
Captures 1
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Citations 14
Citation Indexes 14
arXiv Id:
0705.0206
PMID:
17930131
DOI:
10.1103/physreve.76.026217
Repository URL:
https://digitalcommons.dartmouth.edu/facoa/1992; http://arxiv.org/abs/0705.0206
Author(s):
Buks, Eyal; Zaitsev, Stav; Segev, Eran; Abdo, Baleegh; Blencowe, M. P.
Publisher(s):
American Physical Society (APS)
Tags:
Physics and Astronomy; Mathematics; Condensed Matter - Mesoscale and Nanoscale Physics; Condensed Matter - Superconductivity; Physical Sciences and Mathematics; Physics; Statistical, Nonlinear, and Soft Matter Physics
article description
We study a configuration for displacement detection consisting of a nanomechanical resonator coupled to both a radio frequency superconducting interference device and to a superconducting stripline resonator. We employ an adiabatic approximation and rotating wave approximation and calculate the displacement sensitivity. We study the performance of such a displacement detector when the stripline resonator is driven into a region of nonlinear oscillations. In this region the system exhibits noise squeezing in the output signal when homodyne detection is employed for readout. We show that displacement sensitivity of the device in this region may exceed the upper bound imposed upon the sensitivity when operating in the linear region. On the other hand, we find that the high displacement sensitivity is accompanied by a slowing down of the response of the system, resulting in a limited bandwidth.