Critical Response of a Quantum van der Pol Oscillator.
Publication Date
2019-12-20Journal Title
Phys Rev Lett
ISSN
0031-9007
Publisher
American Physical Society (APS)
Volume
123
Issue
25
Pages
250401
Language
eng
Type
Article
This Version
VoR
Physical Medium
Print
Metadata
Show full item recordCitation
Dutta, S., & Cooper, N. R. (2019). Critical Response of a Quantum van der Pol Oscillator.. Phys Rev Lett, 123 (25), 250401. https://doi.org/10.1103/PhysRevLett.123.250401
Abstract
Classical dynamical systems close to a critical point are known to act as efficient sensors due to a strongly nonlinear response. We explore such systems in the quantum regime by modeling a quantum version of a driven van der Pol oscillator. We find the classical response survives down to one excitation quantum. At very weak drives, genuine quantum features arise, including diverging and negative susceptibilities. Further, the linear response is greatly enhanced by using a strong incoherent pump. These results are largely generic and can be probed in current experimental platforms suited for quantum sensing.
Sponsorship
Engineering and Physical Sciences Research Council (EP/P009565/1)
Simons Foundation (511029)
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1103/PhysRevLett.123.250401
This record's URL: https://www.repository.cam.ac.uk/handle/1810/298894
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