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Large gain quantum-limited qubit measurement using a two-mode nonlinear cavity
- Source :
- New Journal of Physics, Vol 16, Iss 11, p 113032 (2014)
- Publication Year :
- 2014
- Publisher :
- IOP Publishing, 2014.
-
Abstract
- We provide a thorough theoretical analysis of qubit state measurement in a setup where a driven, parametrically-coupled cavity system is directly coupled to the qubit, with one of the cavities having a weak Kerr nonlinearity. Such a system could be readily realized using circuit QED architectures. We demonstrate that this setup is capable in the standard linear-response regime of both producing a highly amplified output signal while at the same time achieving near quantum-limited performance: the measurement backaction on the qubit is near the minimal amount required by the uncertainty principle. This setup thus represents a promising route for performing efficient large-gain qubit measurement that is completely on-chip, and that does not rely on the use of circulators or complex non-reciprocal amplifiers.
Details
- Language :
- English
- ISSN :
- 13672630
- Volume :
- 16
- Issue :
- 11
- Database :
- Directory of Open Access Journals
- Journal :
- New Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.66c185cbe0db44979076e7b7685ea1d7
- Document Type :
- article
- Full Text :
- https://doi.org/10.1088/1367-2630/16/11/113032