Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator.

Suguru Endo, Yuichiro Matsuzaki, Kosuke Kakuyanagi, Shiro Saito, Neill Lambert, Franco Nori

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Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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Authors and funding

6 authors.

Suguru EndoTheoretical Quantum Physics Laboratory, Cluster for Pioneering Research, RIKEN, 351-0198, Wako-shi, Japan. suguru.endo@oriel.ox.ac.uk.

Yuichiro MatsuzakiNational Institute of Advanced Industrial Science and Technology AIST, Tsukuba Central 2, Umezono 1-1-1, Tsukuba, Ibaraki, 305-8568, Japan.

Kosuke KakuyanagiNTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.

Shiro SaitoNTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198, Japan.

Neill LambertTheoretical Quantum Physics Laboratory, Cluster for Pioneering Research, RIKEN, 351-0198, Wako-shi, Japan.

Franco NoriTheoretical Quantum Physics Laboratory, Cluster for Pioneering Research, RIKEN, 351-0198, Wako-shi, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We explore the problem of projecting the ground-state of an ultra-strong-coupled circuit-QED system into a non-energy-eigenstate. As a measurement apparatus we consider a nonlinear driven resonator. We find that the post-measurement state of the nonlinear resonator exhibits a large correlation with the post-measurement state of the ultra-strongly coupled system even when the coupling between measurement device and system is much smaller than the energy scales of the system itself. While the projection is imperfect, we argue that because of the strong nonlinear response of the resonator it works in a practical regime where a linear measurement apparatus would fail.

Identifiers

PMID32019941

DOI10.1088/0305-4470/34/35/315

PMCPMC7000414

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