Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Grönberg, Leif"'
Autor:
Tuokkola, Mikko, Sunada, Yoshiki, Kivijärvi, Heidi, Albanese, Jonatan, Grönberg, Leif, Kaikkonen, Jukka-Pekka, Vesterinen, Visa, Govenius, Joonas, Möttönen, Mikko
Superconducting qubits are one of the most promising physical systems for implementing quantum computers. However, executing quantum algorithms of practical computational advantage requires further improvements in the fidelities of qubit operations,
Externí odkaz:
http://arxiv.org/abs/2407.18778
Autor:
Kosen, Sandoko, Li, Hang-Xi, Rommel, Marcus, Rehammar, Robert, Caputo, Marco, Grönberg, Leif, Fernández-Pendás, Jorge, Kockum, Anton Frisk, Biznárová, Janka, Chen, Liangyu, Križan, Christian, Nylander, Andreas, Osman, Amr, Roudsari, Anita Fadavi, Shiri, Daryoush, Tancredi, Giovanna, Govenius, Joonas, Bylander, Jonas
Publikováno v:
PRX Quantum 5, 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:
http://arxiv.org/abs/2403.00285
Autor:
Li, Hang-Xi, Shiri, Daryoush, Kosen, Sandoko, Rommel, Marcus, Chayanun, Lert, Nylander, Andreas, Rehammar, Robert, Tancredi, Giovanna, Caputo, Marco, Grigoras, Kestutis, Grönberg, Leif, Govenius, Joonas, Bylander, Jonas
Publikováno v:
IEEE Transactions on Quantum Engineering, vol. 4, pp. 1-12, 2023, Art no. 3101312
In superconducting quantum processors, the predictability of device parameters is of increasing importance as many labs scale up their systems to larger sizes in a 3D-integrated architecture. In particular, the properties of superconducting resonator
Externí odkaz:
http://arxiv.org/abs/2305.05502
Autor:
Chen, Liangyu, Li, Hang-Xi, Lu, Yong, Warren, Christopher W., Križan, Christian J., Kosen, Sandoko, Rommel, Marcus, Ahmed, Shahnawaz, Osman, Amr, Biznárová, Janka, Roudsari, Anita Fadavi, Lienhard, Benjamin, Caputo, Marco, Grigoras, Kestutis, Grönberg, Leif, Govenius, Joonas, Kockum, Anton Frisk, Delsing, Per, Bylander, Jonas, Tancredi, Giovanna
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 techniques: appl
Externí odkaz:
http://arxiv.org/abs/2208.05879
Autor:
Kosen, Sandoko, Li, Hang-Xi, Rommel, Marcus, Shiri, Daryoush, Warren, Christopher, Grönberg, Leif, Salonen, Jaakko, Abad, Tahereh, Biznárová, Janka, Caputo, Marco, Chen, Liangyu, Grigoras, Kestutis, Johansson, Göran, Kockum, Anton Frisk, Križan, Christian, Lozano, Daniel Pérez, Norris, Graham, Osman, Amr, Fernández-Pendás, Jorge, Ronzani, Alberto, Roudsari, Anita Fadavi, Simbierowicz, Slawomir, Tancredi, Giovanna, Wallraff, Andreas, Eichler, Christopher, Govenius, Joonas, Bylander, Jonas
Publikováno v:
Quantum Science and Technology, 7(3), 035018 (2022)
We have integrated single and coupled superconducting transmon qubits into flip-chip modules. Each module consists of two chips -- one quantum chip and one control chip -- that are bump-bonded together. We demonstrate time-averaged coherence times ex
Externí odkaz:
http://arxiv.org/abs/2112.02717
Autor:
Perelshtein, Michael, Petrovnin, Kirill, Vesterinen, Visa, Raja, Sina Hamedani, Lilja, Ilari, Will, Marco, Savin, Alexander, Simbierowicz, Slawomir, Jabdaraghi, Robab, Lehtinen, Janne, Grönberg, Leif, Hassel, Juha, Prunnila, Mika, Govenius, Joonas, Paraoanu, Sorin, Hakonen, Pertti
Entangled microwave photons form a fundamental resource for quantum information processing and sensing with continuous variables. We use a low-loss Josephson metamaterial comprising superconducting, non-linear, asymmetric inductive elements to genera
Externí odkaz:
http://arxiv.org/abs/2111.06145
Autor:
Yan, Chengyu, Hassel, Juha, Vesterinen, Visa, Zhang, Jinli, Ikonen, Joni, Grönberg, Leif, Goetz, Jan, Möttönen, Mikko
Publikováno v:
Nature Electronics (2021)
The scaleup of quantum computers operating in the microwave domain requires advanced control electronics, and the use of integrated components that operate at the temperature of the quantum devices is potentially beneficial. However, such an approach
Externí odkaz:
http://arxiv.org/abs/2103.07617
Autor:
Simbierowicz, Slawomir, Vesterinen, Visa, Milem, Joshua, Lintunen, Aleksi, Oksanen, Mika, Roschier, Leif, Grönberg, Leif, Hassel, Juha, Gunnarsson, David, Lake, Russell E.
We present a cryogenic microwave noise source with a characteristic impedance of 50 $\Omega$, which can be installed in a coaxial line of a cryostat. The bath temperature of the noise source is continuously variable between 0.1 K and 5 K without caus
Externí odkaz:
http://arxiv.org/abs/2009.03010
Autor:
Viitanen, Arto, Silveri, Matti, Jenei, Máté, Sevriuk, Vasilii, Tan, Kuan Yen, Partanen, Matti, Goetz, Jan, Grönberg, Leif, Vadimov, Vasilii, Lahtinen, Valtteri, Möttönen, Mikko
Publikováno v:
Phys. Rev. Research 3, 033126 (2021)
The Lamb shift, an energy shift arising from the presence of the electromagnetic vacuum, has been observed in various quantum systems and established as the part of the energy shift independent of the environmental photon number. However, typical stu
Externí odkaz:
http://arxiv.org/abs/2008.08268
Autor:
Zhang, Jinli, Li, Tianyi, Kokkoniemi, Roope, Yan, Chengyu, Liu, Wei, Partanen, Matti, Tan, Kuan Yen, He, Ming, Ji, Lu, Grönberg, Leif, Möttönen, Mikko
We implement a broadly tunable phase shifter for microwaves based on superconducting quantum interference devices (SQUIDs) and study it both experimentally and theoretically. At different frequencies, a unit transmission coefficient, $|S_{21}|=1$, ca
Externí odkaz:
http://arxiv.org/abs/2003.01356