Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Antti Vepsäläinen"'
Autor:
Eric Hyyppä, Antti Vepsäläinen, Miha Papič, Chun Fai Chan, Sinan Inel, Alessandro Landra, Wei Liu, Jürgen Luus, Fabian Marxer, Caspar Ockeloen-Korppi, Sebastian Orbell, Brian Tarasinski, Johannes Heinsoo
Publikováno v:
PRX Quantum, Vol 5, Iss 3, p 030353 (2024)
Improving the speed and fidelity of quantum logic gates is essential to reach quantum advantage with future quantum computers. However, fast logic gates lead to increased leakage errors in superconducting quantum processors based on qubits with low a
Externí odkaz:
https://doaj.org/article/e2a2c21b1e7340febaa15523601b5239
Autor:
Antti Vepsäläinen, Roni Winik, Amir H. Karamlou, Jochen Braumüller, Agustin Di Paolo, Youngkyu Sung, Bharath Kannan, Morten Kjaergaard, David K. Kim, Alexander J. Melville, Bethany M. Niedzielski, Jonilyn L. Yoder, Simon Gustavsson, William D. Oliver
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
The presence of various noises in the qubit environment is a major limitation on qubit coherence time. Here, the authors demonstrate the use a closed-loop feedback to stabilize frequency noise in a flux-tunable superconducting qubit and suggest this
Externí odkaz:
https://doaj.org/article/ae1c2a1c49804716a1d8db576a82d8d0
Autor:
Amir H. Karamlou, Jochen Braumüller, Yariv Yanay, Agustin Di Paolo, Patrick M. Harrington, Bharath Kannan, David Kim, Morten Kjaergaard, Alexander Melville, Sarah Muschinske, Bethany M. Niedzielski, Antti Vepsäläinen, Roni Winik, Jonilyn L. Yoder, Mollie Schwartz, Charles Tahan, Terry P. Orlando, Simon Gustavsson, William D. Oliver
Publikováno v:
npj Quantum Information, Vol 8, Iss 1, Pp 1-8 (2022)
Abstract Particle transport and localization phenomena in condensed-matter systems can be modeled using a tight-binding lattice Hamiltonian. The ideal experimental emulation of such a model utilizes simultaneous, high-fidelity control and readout of
Externí odkaz:
https://doaj.org/article/6d5620e008104427a774c83732d77e6a
Autor:
Youngkyu Sung, Antti Vepsäläinen, Jochen Braumüller, Fei Yan, Joel I-Jan Wang, Morten Kjaergaard, Roni Winik, Philip Krantz, Andreas Bengtsson, Alexander J. Melville, Bethany M. Niedzielski, Mollie E. Schwartz, David K. Kim, Jonilyn L. Yoder, Terry P. Orlando, Simon Gustavsson, William D. Oliver
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to
Externí odkaz:
https://doaj.org/article/fb0badbcc1874995abff41633cca96e1
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
Autor:
Youngkyu Sung, Leon Ding, Jochen Braumüller, Antti Vepsäläinen, Bharath Kannan, Morten Kjaergaard, Ami Greene, Gabriel O. Samach, Chris McNally, David Kim, Alexander Melville, Bethany M. Niedzielski, Mollie E. Schwartz, Jonilyn L. Yoder, Terry P. Orlando, Simon Gustavsson, William D. Oliver
Publikováno v:
Physical Review X, Vol 11, Iss 2, p 021058 (2021)
High-fidelity two-qubit gates at scale are a key requirement to realize the full promise of quantum computation and simulation. The advent and use of coupler elements to tunably control two-qubit interactions has improved operational fidelity in many
Externí odkaz:
https://doaj.org/article/0c7ac0af40bc48ee8c2aeff5bc7eb781
Autor:
Sihao Huang, Benjamin Lienhard, Greg Calusine, Antti Vepsäläinen, Jochen Braumüller, David K. Kim, Alexander J. Melville, Bethany M. Niedzielski, Jonilyn L. Yoder, Bharath Kannan, Terry P. Orlando, Simon Gustavsson, William D. Oliver
Publikováno v:
PRX Quantum, Vol 2, Iss 2, p 020306 (2021)
Solid-state qubits with transition frequencies in the microwave regime, such as superconducting qubits, are at the forefront of quantum information processing. However, high-fidelity, simultaneous control of superconducting qubits at even a moderate
Externí odkaz:
https://doaj.org/article/41223757ee0945008993c6853cdc55cd
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043079 (2020)
We show that stimulated Raman adiabatic passage (STIRAP) and its superadiabatic version (saSTIRAP) have a natural geometric two-star representation on the Majorana sphere. In the case of STIRAP, we find that the evolution is confined to a vertical pl
Externí odkaz:
https://doaj.org/article/0b739cea89ca441f9b91ba3af650749d
Autor:
Antti Vepsäläinen, Sergey Danilin, Elisabetta Paladino, Giuseppe Falci, Gheorghe Sorin Paraoanu
Publikováno v:
Photonics, Vol 3, Iss 4, p 62 (2016)
We introduce and analyze theoretically a procedure that combines slow adiabatic stimulated Raman adiabatic passage (STIRAP) manipulation with short nonadiabatic Rabi pulses to produce any desired three-level state in a qutrit system. In this protocol
Externí odkaz:
https://doaj.org/article/d48410cf620a4119904d3a7325b7f9f6
Autor:
Bharath Kannan, Aziza Almanakly, Youngkyu Sung, Agustin Di Paolo, David A. Rower, Jochen Braumüller, Alexander Melville, Bethany M. Niedzielski, Amir Karamlou, Kyle Serniak, Antti Vepsäläinen, Mollie E. Schwartz, Jonilyn L. Yoder, Roni Winik, Joel I-Jan Wang, Terry P. Orlando, Simon Gustavsson, Jeffrey A. Grover, William D. Oliver
Publikováno v:
Nature Physics. 19:394-400
Routing quantum information between non-local computational nodes is a foundation for extensible networks of quantum processors. Quantum information transfer between arbitrary nodes is generally mediated either by photons that propagate between them,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b51f6bf72b78e3400b1f194b35c5e96
https://doi.org/10.1038/s41567-022-01869-5
https://doi.org/10.1038/s41567-022-01869-5