Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8%

Autor: Fabian Marxer, Antti Vepsäläinen, Shan W. Jolin, Jani Tuorila, Alessandro Landra, Caspar Ockeloen-Korppi, Wei Liu, Olli Ahonen, Adrian Auer, Lucien Belzane, Ville Bergholm, Chun Fai Chan, Kok Wai Chan, Tuukka Hiltunen, Juho Hotari, Eric Hyyppä, Joni Ikonen, David Janzso, Miikka Koistinen, Janne Kotilahti, Tianyi Li, Jyrgen Luus, Miha Papic, Matti Partanen, Jukka Räbinä, Jari Rosti, Mykhailo Savytskyi, Marko Seppälä, Vasilii Sevriuk, Eelis Takala, Brian Tarasinski, Manish J. Thapa, Francesca Tosto, Natalia Vorobeva, Liuqi Yu, Kuan Yen Tan, Juha Hassel, Mikko Möttönen, Johannes Heinsoo

Publikováno v: PRX Quantum, Vol 4, Iss 1, p 010314 (2023)

Tunable coupling of superconducting qubits has been widely studied due to its importance for isolated gate operations in scalable quantum processor architectures. Here, we demonstrate a tunable qubit-qubit coupler based on a floating transmon device,

Externí odkaz: https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8

Accelerated stabilization of coherent photon states

Autor: Joni Ikonen, Mikko Möttönen

Publikováno v: New Journal of Physics, Vol 20, Iss 10, p 103047 (2018)

Control and utilization of coherent states of microwave photons is a ubiquitous requirement for the present and near-future implementations of solid-state quantum computers. The rate at which the photon state responds to external driving is limited b

Externí odkaz: https://doaj.org/article/b2cb8088f48f483e83016bed275a9c62

Qubit Measurement by Multichannel Driving

Autor: Leif Grönberg, Kuan Yen Tan, Matti Partanen, Mikko Möttönen, Aarne Keränen, Slawomir Simbierowicz, Visa Vesterinen, Jesper Ilves, Andras Gunyho, Dibyendu Hazra, Juha Hassel, Joni Ikonen, Jan Goetz

Publikováno v: Ikonen, J, Goetz, J, Ilves, J, Keränen, A, Gunyho, A M, Partanen, M, Tan, K Y, Hazra, D, Grönberg, L, Vesterinen, V, Simbierowicz, S, Hassel, J & Möttönen, M 2019, ' Qubit Measurement by Multichannel Driving ', Physical Review Letters, vol. 122, no. 8, 080503 . https://doi.org/10.1103/PhysRevLett.122.080503
Physical Review Letters

We theoretically propose and experimentally implement a method of measuring a qubit by driving it close to the frequency of a dispersively coupled bosonic mode. The separation of the bosonic states corresponding to different qubit states begins essen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92abaf721f2e67fe9813c1d25d253685
https://cris.vtt.fi/en/publications/80ca8009-6d4d-4ed4-90e9-d52c1fd6509a

Exceptional points in tunable superconducting resonators

Autor: Matti Partanen, Jan Goetz, Kuan Yen Tan, Kassius Kohvakka, Vasilii Sevriuk, Russell E. Lake, Roope Kokkoniemi, Joni Ikonen, Dibyendu Hazra, Akseli Mäkinen, Eric Hyyppä, Leif Grönberg, Visa Vesterinen, Matti Silveri, Mikko Möttönen

Publikováno v: Physical Review B

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=r3c4b2081b22::25c52d5da63fbe59eb34cc695f90cd63

Energy-efficient quantum computing

Autor: Mikko Möttönen, J. Salmilehto, Joni Ikonen

Publikováno v: npj Quantum Information, Vol 3, Iss 1, Pp 1-7 (2017)
npj Quantum Information

In the near future, a major challenge in quantum computing is to scale up robust qubit prototypes to practical problem sizes and to implement comprehensive error correction for computational precision. Due to inevitable quantum uncertainties in reson

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::506b54f6f0aa8da8f9a79f91ee546123
http://urn.fi/URN:NBN:fi:jyu-201705172384