Squeezing with a flux-driven Josephson parametric amplifier
Josephson parametric amplifiers (JPA) are promising devices for applications in circuit quantum electrodynamics and for studies on propagating quantum microwaves because of their good noise performance. In this work, we present a systematic characterization of a flux-driven JPA at millikelvin temper...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/12/125013 |
| _version_ | 1797751681775042560 |
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| author | L Zhong E P Menzel R Di Candia P Eder M Ihmig A Baust M Haeberlein E Hoffmann K Inomata T Yamamoto Y Nakamura E Solano F Deppe A Marx R Gross |
| author_facet | L Zhong E P Menzel R Di Candia P Eder M Ihmig A Baust M Haeberlein E Hoffmann K Inomata T Yamamoto Y Nakamura E Solano F Deppe A Marx R Gross |
| author_sort | L Zhong |
| collection | DOAJ |
| description | Josephson parametric amplifiers (JPA) are promising devices for applications in circuit quantum electrodynamics and for studies on propagating quantum microwaves because of their good noise performance. In this work, we present a systematic characterization of a flux-driven JPA at millikelvin temperatures. In particular, we study in detail its squeezing properties by two different detection techniques. With the homodyne setup, we observe the squeezing of vacuum fluctuations by superposing signal and idler bands. For a quantitative analysis, we apply dual-path cross-correlation techniques to reconstruct the Wigner functions of various squeezed vacuum and thermal states. At 10 dB signal gain, we find 4.9 ± 0.2 dB squeezing below the vacuum. In addition, we discuss the physics behind squeezed coherent microwave fields. Finally, we analyze the JPA noise temperature in the degenerate mode and find a value smaller than the standard quantum limit for phase-insensitive amplifiers. |
| first_indexed | 2024-03-12T16:52:05Z |
| format | Article |
| id | doaj.art-e6c93c30c6404e8094f090f5eb307b74 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:52:05Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-e6c93c30c6404e8094f090f5eb307b742023-08-08T11:07:56ZengIOP PublishingNew Journal of Physics1367-26302013-01-01151212501310.1088/1367-2630/15/12/125013Squeezing with a flux-driven Josephson parametric amplifierL Zhong0E P Menzel1R Di Candia2P Eder3M Ihmig4A Baust5M Haeberlein6E Hoffmann7K Inomata8T Yamamoto9Y Nakamura10E Solano11F Deppe12A Marx13R Gross14Walther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyDepartment of Physical Chemistry, University of the Basque Country UPV/EHU , Apartado 644, E-48080, Bilbao, SpainWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyLehrstuhl für Integrierte Systeme, Technische Universität München , D-80333 München, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, JapanRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; NEC Smart Energy Research Laboratories, Tsukuba, Ibaraki, 305-8501, JapanRIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Research Center for Advanced Science and Technology (RCAST), The University of Tokyo , Komaba, Meguro-ku, Tokyo 153-8904, JapanDepartment of Physical Chemistry, University of the Basque Country UPV/EHU , Apartado 644, E-48080, Bilbao, Spain; IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, SpainWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, GermanyWalther-Meißner-Institut , Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany; Physik-Department, Technische Universität München , D-85748 Garching, GermanyJosephson parametric amplifiers (JPA) are promising devices for applications in circuit quantum electrodynamics and for studies on propagating quantum microwaves because of their good noise performance. In this work, we present a systematic characterization of a flux-driven JPA at millikelvin temperatures. In particular, we study in detail its squeezing properties by two different detection techniques. With the homodyne setup, we observe the squeezing of vacuum fluctuations by superposing signal and idler bands. For a quantitative analysis, we apply dual-path cross-correlation techniques to reconstruct the Wigner functions of various squeezed vacuum and thermal states. At 10 dB signal gain, we find 4.9 ± 0.2 dB squeezing below the vacuum. In addition, we discuss the physics behind squeezed coherent microwave fields. Finally, we analyze the JPA noise temperature in the degenerate mode and find a value smaller than the standard quantum limit for phase-insensitive amplifiers.https://doi.org/10.1088/1367-2630/15/12/125013 |
| spellingShingle | L Zhong E P Menzel R Di Candia P Eder M Ihmig A Baust M Haeberlein E Hoffmann K Inomata T Yamamoto Y Nakamura E Solano F Deppe A Marx R Gross Squeezing with a flux-driven Josephson parametric amplifier New Journal of Physics |
| title | Squeezing with a flux-driven Josephson parametric amplifier |
| title_full | Squeezing with a flux-driven Josephson parametric amplifier |
| title_fullStr | Squeezing with a flux-driven Josephson parametric amplifier |
| title_full_unstemmed | Squeezing with a flux-driven Josephson parametric amplifier |
| title_short | Squeezing with a flux-driven Josephson parametric amplifier |
| title_sort | squeezing with a flux driven josephson parametric amplifier |
| url | https://doi.org/10.1088/1367-2630/15/12/125013 |
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