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

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, which allows us to place qubits at least 2 mm apa...
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Autor*in:	Fabian Marxer [verfasserIn] Antti Vepsäläinen [verfasserIn] Shan W. Jolin [verfasserIn] Jani Tuorila [verfasserIn] Alessandro Landra [verfasserIn] Caspar Ockeloen-Korppi [verfasserIn] Wei Liu [verfasserIn] Olli Ahonen [verfasserIn] Adrian Auer [verfasserIn] Lucien Belzane [verfasserIn] Ville Bergholm [verfasserIn] Chun Fai Chan [verfasserIn] Kok Wai Chan [verfasserIn] Tuukka Hiltunen [verfasserIn] Juho Hotari [verfasserIn] Eric Hyyppä [verfasserIn] Joni Ikonen [verfasserIn] David Janzso [verfasserIn] Miikka Koistinen [verfasserIn] Janne Kotilahti [verfasserIn] Tianyi Li [verfasserIn] Jyrgen Luus [verfasserIn] Miha Papic [verfasserIn] Matti Partanen [verfasserIn] Jukka Räbinä [verfasserIn] Jari Rosti [verfasserIn] Mykhailo Savytskyi [verfasserIn] Marko Seppälä [verfasserIn] Vasilii Sevriuk [verfasserIn] Eelis Takala [verfasserIn] Brian Tarasinski [verfasserIn] Manish J. Thapa [verfasserIn] Francesca Tosto [verfasserIn] Natalia Vorobeva [verfasserIn] Liuqi Yu [verfasserIn] Kuan Yen Tan [verfasserIn] Juha Hassel [verfasserIn] Mikko Möttönen [verfasserIn] Johannes Heinsoo [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Übergeordnetes Werk:	In: PRX Quantum - American Physical Society, 2021, 4(2023), 1, p 010314
Übergeordnetes Werk:	volume:4 ; year:2023 ; number:1, p 010314

Links:	Link aufrufen Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1103/PRXQuantum.4.010314

Katalog-ID:	DOAJ080911420

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allfields	10.1103/PRXQuantum.4.010314 doi (DE-627)DOAJ080911420 (DE-599)DOAJe18e6fbc514c4415bc08dec11f78b0b8 DE-627 ger DE-627 rakwb eng QC1-999 QA76.75-76.765 Fabian Marxer verfasserin aut Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8% 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity. Physics Computer software Antti Vepsäläinen verfasserin aut Shan W. Jolin verfasserin aut Jani Tuorila verfasserin aut Alessandro Landra verfasserin aut Caspar Ockeloen-Korppi verfasserin aut Wei Liu verfasserin aut Olli Ahonen verfasserin aut Adrian Auer verfasserin aut Lucien Belzane verfasserin aut Ville Bergholm verfasserin aut Chun Fai Chan verfasserin aut Kok Wai Chan verfasserin aut Tuukka Hiltunen verfasserin aut Juho Hotari verfasserin aut Eric Hyyppä verfasserin aut Joni Ikonen verfasserin aut David Janzso verfasserin aut Miikka Koistinen verfasserin aut Janne Kotilahti verfasserin aut Tianyi Li verfasserin aut Jyrgen Luus verfasserin aut Miha Papic verfasserin aut Matti Partanen verfasserin aut Jukka Räbinä verfasserin aut Jari Rosti verfasserin aut Mykhailo Savytskyi verfasserin aut Marko Seppälä verfasserin aut Vasilii Sevriuk verfasserin aut Eelis Takala verfasserin aut Brian Tarasinski verfasserin aut Manish J. Thapa verfasserin aut Francesca Tosto verfasserin aut Natalia Vorobeva verfasserin aut Liuqi Yu verfasserin aut Kuan Yen Tan verfasserin aut Juha Hassel verfasserin aut Mikko Möttönen verfasserin aut Johannes Heinsoo verfasserin aut In PRX Quantum American Physical Society, 2021 4(2023), 1, p 010314 (DE-627)1757559825 26913399 nnns volume:4 year:2023 number:1, p 010314 https://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/toc/2691-3399 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 1, p 010314
spelling	10.1103/PRXQuantum.4.010314 doi (DE-627)DOAJ080911420 (DE-599)DOAJe18e6fbc514c4415bc08dec11f78b0b8 DE-627 ger DE-627 rakwb eng QC1-999 QA76.75-76.765 Fabian Marxer verfasserin aut Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8% 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity. Physics Computer software Antti Vepsäläinen verfasserin aut Shan W. Jolin verfasserin aut Jani Tuorila verfasserin aut Alessandro Landra verfasserin aut Caspar Ockeloen-Korppi verfasserin aut Wei Liu verfasserin aut Olli Ahonen verfasserin aut Adrian Auer verfasserin aut Lucien Belzane verfasserin aut Ville Bergholm verfasserin aut Chun Fai Chan verfasserin aut Kok Wai Chan verfasserin aut Tuukka Hiltunen verfasserin aut Juho Hotari verfasserin aut Eric Hyyppä verfasserin aut Joni Ikonen verfasserin aut David Janzso verfasserin aut Miikka Koistinen verfasserin aut Janne Kotilahti verfasserin aut Tianyi Li verfasserin aut Jyrgen Luus verfasserin aut Miha Papic verfasserin aut Matti Partanen verfasserin aut Jukka Räbinä verfasserin aut Jari Rosti verfasserin aut Mykhailo Savytskyi verfasserin aut Marko Seppälä verfasserin aut Vasilii Sevriuk verfasserin aut Eelis Takala verfasserin aut Brian Tarasinski verfasserin aut Manish J. Thapa verfasserin aut Francesca Tosto verfasserin aut Natalia Vorobeva verfasserin aut Liuqi Yu verfasserin aut Kuan Yen Tan verfasserin aut Juha Hassel verfasserin aut Mikko Möttönen verfasserin aut Johannes Heinsoo verfasserin aut In PRX Quantum American Physical Society, 2021 4(2023), 1, p 010314 (DE-627)1757559825 26913399 nnns volume:4 year:2023 number:1, p 010314 https://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/toc/2691-3399 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 1, p 010314
allfields_unstemmed	10.1103/PRXQuantum.4.010314 doi (DE-627)DOAJ080911420 (DE-599)DOAJe18e6fbc514c4415bc08dec11f78b0b8 DE-627 ger DE-627 rakwb eng QC1-999 QA76.75-76.765 Fabian Marxer verfasserin aut Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8% 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity. Physics Computer software Antti Vepsäläinen verfasserin aut Shan W. Jolin verfasserin aut Jani Tuorila verfasserin aut Alessandro Landra verfasserin aut Caspar Ockeloen-Korppi verfasserin aut Wei Liu verfasserin aut Olli Ahonen verfasserin aut Adrian Auer verfasserin aut Lucien Belzane verfasserin aut Ville Bergholm verfasserin aut Chun Fai Chan verfasserin aut Kok Wai Chan verfasserin aut Tuukka Hiltunen verfasserin aut Juho Hotari verfasserin aut Eric Hyyppä verfasserin aut Joni Ikonen verfasserin aut David Janzso verfasserin aut Miikka Koistinen verfasserin aut Janne Kotilahti verfasserin aut Tianyi Li verfasserin aut Jyrgen Luus verfasserin aut Miha Papic verfasserin aut Matti Partanen verfasserin aut Jukka Räbinä verfasserin aut Jari Rosti verfasserin aut Mykhailo Savytskyi verfasserin aut Marko Seppälä verfasserin aut Vasilii Sevriuk verfasserin aut Eelis Takala verfasserin aut Brian Tarasinski verfasserin aut Manish J. Thapa verfasserin aut Francesca Tosto verfasserin aut Natalia Vorobeva verfasserin aut Liuqi Yu verfasserin aut Kuan Yen Tan verfasserin aut Juha Hassel verfasserin aut Mikko Möttönen verfasserin aut Johannes Heinsoo verfasserin aut In PRX Quantum American Physical Society, 2021 4(2023), 1, p 010314 (DE-627)1757559825 26913399 nnns volume:4 year:2023 number:1, p 010314 https://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/toc/2691-3399 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 1, p 010314
allfieldsGer	10.1103/PRXQuantum.4.010314 doi (DE-627)DOAJ080911420 (DE-599)DOAJe18e6fbc514c4415bc08dec11f78b0b8 DE-627 ger DE-627 rakwb eng QC1-999 QA76.75-76.765 Fabian Marxer verfasserin aut Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8% 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity. Physics Computer software Antti Vepsäläinen verfasserin aut Shan W. Jolin verfasserin aut Jani Tuorila verfasserin aut Alessandro Landra verfasserin aut Caspar Ockeloen-Korppi verfasserin aut Wei Liu verfasserin aut Olli Ahonen verfasserin aut Adrian Auer verfasserin aut Lucien Belzane verfasserin aut Ville Bergholm verfasserin aut Chun Fai Chan verfasserin aut Kok Wai Chan verfasserin aut Tuukka Hiltunen verfasserin aut Juho Hotari verfasserin aut Eric Hyyppä verfasserin aut Joni Ikonen verfasserin aut David Janzso verfasserin aut Miikka Koistinen verfasserin aut Janne Kotilahti verfasserin aut Tianyi Li verfasserin aut Jyrgen Luus verfasserin aut Miha Papic verfasserin aut Matti Partanen verfasserin aut Jukka Räbinä verfasserin aut Jari Rosti verfasserin aut Mykhailo Savytskyi verfasserin aut Marko Seppälä verfasserin aut Vasilii Sevriuk verfasserin aut Eelis Takala verfasserin aut Brian Tarasinski verfasserin aut Manish J. Thapa verfasserin aut Francesca Tosto verfasserin aut Natalia Vorobeva verfasserin aut Liuqi Yu verfasserin aut Kuan Yen Tan verfasserin aut Juha Hassel verfasserin aut Mikko Möttönen verfasserin aut Johannes Heinsoo verfasserin aut In PRX Quantum American Physical Society, 2021 4(2023), 1, p 010314 (DE-627)1757559825 26913399 nnns volume:4 year:2023 number:1, p 010314 https://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/toc/2691-3399 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 1, p 010314
allfieldsSound	10.1103/PRXQuantum.4.010314 doi (DE-627)DOAJ080911420 (DE-599)DOAJe18e6fbc514c4415bc08dec11f78b0b8 DE-627 ger DE-627 rakwb eng QC1-999 QA76.75-76.765 Fabian Marxer verfasserin aut Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8% 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity. Physics Computer software Antti Vepsäläinen verfasserin aut Shan W. Jolin verfasserin aut Jani Tuorila verfasserin aut Alessandro Landra verfasserin aut Caspar Ockeloen-Korppi verfasserin aut Wei Liu verfasserin aut Olli Ahonen verfasserin aut Adrian Auer verfasserin aut Lucien Belzane verfasserin aut Ville Bergholm verfasserin aut Chun Fai Chan verfasserin aut Kok Wai Chan verfasserin aut Tuukka Hiltunen verfasserin aut Juho Hotari verfasserin aut Eric Hyyppä verfasserin aut Joni Ikonen verfasserin aut David Janzso verfasserin aut Miikka Koistinen verfasserin aut Janne Kotilahti verfasserin aut Tianyi Li verfasserin aut Jyrgen Luus verfasserin aut Miha Papic verfasserin aut Matti Partanen verfasserin aut Jukka Räbinä verfasserin aut Jari Rosti verfasserin aut Mykhailo Savytskyi verfasserin aut Marko Seppälä verfasserin aut Vasilii Sevriuk verfasserin aut Eelis Takala verfasserin aut Brian Tarasinski verfasserin aut Manish J. Thapa verfasserin aut Francesca Tosto verfasserin aut Natalia Vorobeva verfasserin aut Liuqi Yu verfasserin aut Kuan Yen Tan verfasserin aut Juha Hassel verfasserin aut Mikko Möttönen verfasserin aut Johannes Heinsoo verfasserin aut In PRX Quantum American Physical Society, 2021 4(2023), 1, p 010314 (DE-627)1757559825 26913399 nnns volume:4 year:2023 number:1, p 010314 https://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei http://doi.org/10.1103/PRXQuantum.4.010314 kostenfrei https://doaj.org/toc/2691-3399 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 1, p 010314
language	English
source	In PRX Quantum 4(2023), 1, p 010314 volume:4 year:2023 number:1, p 010314
sourceStr	In PRX Quantum 4(2023), 1, p 010314 volume:4 year:2023 number:1, p 010314
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Physics Computer software
isfreeaccess_bool	true
container_title	PRX Quantum
authorswithroles_txt_mv	Fabian Marxer @@aut@@ Antti Vepsäläinen @@aut@@ Shan W. Jolin @@aut@@ Jani Tuorila @@aut@@ Alessandro Landra @@aut@@ Caspar Ockeloen-Korppi @@aut@@ Wei Liu @@aut@@ Olli Ahonen @@aut@@ Adrian Auer @@aut@@ Lucien Belzane @@aut@@ Ville Bergholm @@aut@@ Chun Fai Chan @@aut@@ Kok Wai Chan @@aut@@ Tuukka Hiltunen @@aut@@ Juho Hotari @@aut@@ Eric Hyyppä @@aut@@ Joni Ikonen @@aut@@ David Janzso @@aut@@ Miikka Koistinen @@aut@@ Janne Kotilahti @@aut@@ Tianyi Li @@aut@@ Jyrgen Luus @@aut@@ Miha Papic @@aut@@ Matti Partanen @@aut@@ Jukka Räbinä @@aut@@ Jari Rosti @@aut@@ Mykhailo Savytskyi @@aut@@ Marko Seppälä @@aut@@ Vasilii Sevriuk @@aut@@ Eelis Takala @@aut@@ Brian Tarasinski @@aut@@ Manish J. Thapa @@aut@@ Francesca Tosto @@aut@@ Natalia Vorobeva @@aut@@ Liuqi Yu @@aut@@ Kuan Yen Tan @@aut@@ Juha Hassel @@aut@@ Mikko Möttönen @@aut@@ Johannes Heinsoo @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	1757559825
id	DOAJ080911420
language_de	englisch
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author	Fabian Marxer
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topic_title	QC1-999 QA76.75-76.765 Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8%
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title	Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8%
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author_browse	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
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title_sort	long-distance transmon coupler with cz-gate fidelity above 99.8%
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title_auth	Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8%
abstract	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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity.
abstractGer	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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity.
abstract_unstemmed	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, which allows us to place qubits at least 2 mm apart from each other while maintaining over 50-MHz coupling between the coupler and the qubits. In the introduced tunable-coupler design, both the qubit-qubit and the qubit-coupler couplings are mediated by two waveguides instead of relying on direct capacitive couplings between the components, reducing the impact of the qubit-qubit distance on the couplings. This leaves space for each qubit to have an individual readout resonator and a Purcell filter, which is needed for fast high-fidelity readout. In addition, simulations show that the large qubit-qubit distance significantly lowers unwanted non-nearest-neighbor coupling and allows multiple control lines to cross over the structure with minimal crosstalk. Using the proposed flexible and scalable architecture, we demonstrate a controlled-Z gate with (99.81±0.02)% fidelity.
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title_short	Long-Distance Transmon Coupler with cz-Gate Fidelity above 99.8%
url	https://doi.org/10.1103/PRXQuantum.4.010314 https://doaj.org/article/e18e6fbc514c4415bc08dec11f78b0b8 http://doi.org/10.1103/PRXQuantum.4.010314 https://doaj.org/toc/2691-3399
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up_date	2024-07-03T17:13:18.812Z
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