Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Joonas Govenius"'
Autor:
Paloma Ruiz Kärkkäinen, Georgi Popov, Timo Hatanpää, Antti Kemppinen, Katja Kohopää, Mohammad Bagheri, Hannu‐Pekka Komsa, Mikko Heikkilä, Kenichiro Mizohata, Mykhailo Chundak, Petro Deminskyi, Anton Vihervaara, Mário Ribeiro, Joel Hätinen, Joonas Govenius, Matti Putkonen, Mikko Ritala
Publikováno v:
Advanced Materials Interfaces, Vol 11, Iss 26, Pp n/a-n/a (2024)
Abstract The development of deposition processes for metal carbide thin films is rapidly advancing, driven by their potential for applications including catalysis, batteries, and semiconductor devices. Within this landscape, atomic layer deposition (
Externí odkaz:
https://doaj.org/article/ad29c00f170c431f87c2eb643717cca5
Autor:
Katja Kohopää, Alberto Ronzani, Robab Najafi Jabdaraghi, Arijit Bera, Mário Ribeiro, Dibyendu Hazra, Jorden Senior, Mika Prunnila, Joonas Govenius, Janne S. Lehtinen, Antti Kemppinen
Publikováno v:
APL Materials, Vol 12, Iss 7, Pp 071101-071101-8 (2024)
We demonstrate ion irradiation by argon or gallium as a wafer-scale post-processing method to increase disorder in superconducting thin films. We study several widely used superconductors, both single-elements and compounds. We show that ion irradiat
Externí odkaz:
https://doaj.org/article/90d8b57d346b4bceba17ebce38fa4dfa
Autor:
Sandoko Kosen, Hang-Xi Li, Marcus Rommel, Robert Rehammar, Marco Caputo, Leif Grönberg, Jorge Fernández-Pendás, Anton Frisk Kockum, Janka Biznárová, Liangyu Chen, Christian Križan, Andreas Nylander, Amr Osman, Anita Fadavi Roudsari, Daryoush Shiri, Giovanna Tancredi, Joonas Govenius, Jonas Bylander
Publikováno v:
PRX Quantum, Vol 5, Iss 3, p 030350 (2024)
Quantum processors require a signal-delivery architecture with high addressability (low crosstalk) to ensure high performance already at the scale of dozens of qubits. Signal crosstalk causes inadvertent driving of quantum gates, which will adversely
Externí odkaz:
https://doaj.org/article/b4c9438783c84d1198810be2120f0e78
Autor:
Liangyu Chen, Hang-Xi Li, Yong Lu, Christopher W. Warren, Christian J. Križan, Sandoko Kosen, Marcus Rommel, Shahnawaz Ahmed, Amr Osman, Janka Biznárová, Anita Fadavi Roudsari, Benjamin Lienhard, Marco Caputo, Kestutis Grigoras, Leif Grönberg, Joonas Govenius, Anton Frisk Kockum, Per Delsing, Jonas Bylander, Giovanna Tancredi
Publikováno v:
npj Quantum Information, Vol 9, Iss 1, Pp 1-7 (2023)
Abstract High-fidelity and rapid readout of a qubit state is key to quantum computing and communication, and it is a prerequisite for quantum error correction. We present a readout scheme for superconducting qubits that combines two microwave techniq
Externí odkaz:
https://doaj.org/article/8c3871fbf1624c9781796e27cc450677
Autor:
Hang-Xi Li, Daryoush Shiri, Sandoko Kosen, Marcus Rommel, Lert Chayanun, Andreas Nylander, Robert Rehammar, Giovanna Tancredi, Marco Caputo, Kestutis Grigoras, Leif Gronberg, Joonas Govenius, Jonas Bylander
Publikováno v:
IEEE Transactions on Quantum Engineering, Vol 4, Pp 1-12 (2023)
In superconducting quantum processors, the predictability of device parameters is of increasing importance as many laboratories scale up their systems to larger sizes in a 3-D-integrated architecture. In particular, the properties of superconducting
Externí odkaz:
https://doaj.org/article/1bf40183450747f580a9485e2790ac86
Autor:
Liangyu Chen, Hang-Xi Li, Yong Lu, Christopher W. Warren, Christian J. Križan, Sandoko Kosen, Marcus Rommel, Shahnawaz Ahmed, Amr Osman, Janka Biznárová, Anita Fadavi Roudsari, Benjamin Lienhard, Marco Caputo, Kestutis Grigoras, Leif Grönberg, Joonas Govenius, Anton Frisk Kockum, Per Delsing, Jonas Bylander, Giovanna Tancredi
Publikováno v:
npj Quantum Information, Vol 9, Iss 1, Pp 1-1 (2023)
Externí odkaz:
https://doaj.org/article/0cb5c8f00ca344cb8bf78abf149ab270
Autor:
Kuan Yen Tan, Matti Partanen, Russell E. Lake, Joonas Govenius, Shumpei Masuda, Mikko Möttönen
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-8 (2017)
Efficient on-demand cooling of the functional degrees of freedom in solid-state implementations of quantum information processing devices remains a challenge. Here the authors demonstrate direct cooling of a photonic mode of a superconducting resonat
Externí odkaz:
https://doaj.org/article/fa0235497469495db7d4d5ad2057031a
Autor:
Emma Mykkänen, Arijit Bera, Janne S. Lehtinen, Alberto Ronzani, Katja Kohopää, Teresa Hönigl-Decrinis, Rais Shaikhaidarov, Sebastian E. de Graaf, Joonas Govenius, Mika Prunnila
Publikováno v:
Nanomaterials, Vol 10, Iss 5, p 950 (2020)
We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and cri
Externí odkaz:
https://doaj.org/article/b3fe9e14051444f39f7fe5eebbd42b82
Autor:
Mateo Casariego, Emmanuel Zambrini Cruzeiro, Stefano Gherardini, Tasio Gonzalez-Raya, Rui André, Gonçalo Frazão, Giacomo Catto, Mikko Möttönen, Debopam Datta, Klaara Viisanen, Joonas Govenius, Mika Prunnila, Kimmo Tuominen, Maximilian Reichert, Michael Renger, Kirill G Fedorov, Frank Deppe, Harriet van der Vliet, A J Matthews, Yolanda Fernández, R Assouly, R Dassonneville, B Huard, Mikel Sanz, Yasser Omar
Publikováno v:
Casariego, M, Zambrini Cruzeiro, E, Gherardini, S, Gonzalez-Raya, T, André, R, Frazão, G, Catto, G, Möttönen, M, Datta, D, Viisanen, K, Govenius, J, Prunnila, M, Tuominen, K, Reichert, M, Renger, M, Fedorov, K G, Deppe, F, van der Vliet, H, Matthews, A J, Fernández, Y, Assouly, R, Dassonneville, R, Huard, B, Sanz, M & Omar, Y 2023, ' Propagating quantum microwaves : towards applications in communication and sensing ', Quantum Science and Technology, vol. 8, no. 2, 023001 . https://doi.org/10.1088/2058-9565/acc4af
Quantum Sci.Technol.
Quantum Sci.Technol., 2023, 8 (2), pp.023001. ⟨10.1088/2058-9565/acc4af⟩
arXiv
Quantum Sci.Technol.
Quantum Sci.Technol., 2023, 8 (2), pp.023001. ⟨10.1088/2058-9565/acc4af⟩
arXiv
Funding Information: The authors thank S Pirandola, and S Gasparinetti for useful discussions, and thank the support from Project QMiCS (820505) of the EU Flagship on Quantum Technologies. M C, E Z C, R A, G F, S G, and Y O thank the support from FCT
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a8b1138871f33f41404de91c43311a5
https://cris.vtt.fi/en/publications/6221d0dc-b128-4db5-979a-2918c47625be
https://cris.vtt.fi/en/publications/6221d0dc-b128-4db5-979a-2918c47625be
Autor:
Visa Vesterinen, Slawomir Simbierowicz, Robab Najafi Jabdaraghi, Leif Gronberg, Janne S. Lehtinen, Mika Prunnila, Joonas Govenius
Publikováno v:
Vesterinen, V, Simbierowicz, S, Najafi Jabdaraghi, R, Gronberg, L, Lehtinen, J S, Prunnila, M & Govenius, J 2022, ' A Sub-GHz Impedance-engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots ', IEEE Transactions on Applied Superconductivity, vol. 32, no. 4 . https://doi.org/10.1109/TASC.2022.3148965
In the work on superconducting parametric amplifiers, the frequency band below one gigahertz is calling for systematic improvements. Despite a prospect for ultralow added noise, bandwidth limitations have slowed down the integration of such amplifier