Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Anita Fadavi Roudsari"'
Autor:
Janka Biznárová, Amr Osman, Emil Rehnman, Lert Chayanun, Christian Križan, Per Malmberg, Marcus Rommel, Christopher Warren, Per Delsing, August Yurgens, Jonas Bylander, Anita Fadavi Roudsari
Publikováno v:
npj Quantum Information, Vol 10, Iss 1, Pp 1-8 (2024)
Abstract We demonstrate aluminum-on-silicon planar transmon qubits with time-averaged T 1 energy relaxation times of up to 270 μs, corresponding to Q = 5 million, and a highest observed value of 501 μs. Through materials analysis techniques and num
Externí odkaz:
https://doaj.org/article/20bfc73ce0604c19a9c2c8f419ef1076
Autor:
Lert Chayanun, Janka Biznárová, Lunjie Zeng, Per Malmberg, Andreas Nylander, Amr Osman, Marcus Rommel, Pui Lam Tam, Eva Olsson, Per Delsing, August Yurgens, Jonas Bylander, Anita Fadavi Roudsari
Publikováno v:
APL Quantum, Vol 1, Iss 2, Pp 026115-026115-10 (2024)
We systematically investigate the influence of the fabrication process on dielectric loss in aluminum-on-silicon superconducting coplanar waveguide resonators with internal quality factors (Qi) of about one million at the single-photon level. These d
Externí odkaz:
https://doaj.org/article/3618182393f14defb112b8b9bcbade3c
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:
Christopher W. Warren, Jorge Fernández-Pendás, Shahnawaz Ahmed, Tahereh Abad, Andreas Bengtsson, Janka Biznárová, Kamanasish Debnath, Xiu Gu, Christian Križan, Amr Osman, Anita Fadavi Roudsari, Per Delsing, Göran Johansson, Anton Frisk Kockum, Giovanna Tancredi, Jonas Bylander
Publikováno v:
npj Quantum Information, Vol 9, Iss 1, Pp 1-9 (2023)
Abstract While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in the presence of gate errors, especially those due to decoherenc
Externí odkaz:
https://doaj.org/article/41f8802f57ad4d95921f53c8f133518c
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:
Amr Osman, Jorge Fernández-Pendás, Christopher Warren, Sandoko Kosen, Marco Scigliuzzo, Anton Frisk Kockum, Giovanna Tancredi, Anita Fadavi Roudsari, Jonas Bylander
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043001 (2023)
The reproducibility of qubit parameters is a challenge for scaling up superconducting quantum processors. Signal cross talk imposes constraints on the frequency separation between neighboring qubits. The frequency uncertainty of transmon qubits arisi
Externí odkaz:
https://doaj.org/article/da89af3fa78440d6b511650202383024
Autor:
Yong Lu, Andreas Bengtsson, Jonathan J. Burnett, Emely Wiegand, Baladitya Suri, Philip Krantz, Anita Fadavi Roudsari, Anton Frisk Kockum, Simone Gasparinetti, Göran Johansson, Per Delsing
Publikováno v:
npj Quantum Information, Vol 7, Iss 1, Pp 1-9 (2021)
Abstract We experimentally investigate a superconducting qubit coupled to the end of an open transmission line, in a regime where the qubit decay rates to the transmission line and to its own environment are comparable. We perform measurements of coh
Externí odkaz:
https://doaj.org/article/e1515629cfdc4b57ae3ac2644563f262
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:
Marco Scigliuzzo, Laure E Bruhat, Andreas Bengtsson, Jonathan J Burnett, Anita Fadavi Roudsari, Per Delsing
Publikováno v:
New Journal of Physics, Vol 22, Iss 5, p 053027 (2020)
We numerically and experimentally investigate the phononic loss for superconducting resonators fabricated on a piezoelectric substrate. With the help of finite element method simulations, we calculate the energy loss due to electromechanical conversi
Externí odkaz:
https://doaj.org/article/34abaee87a4b4697b1546a7833d5ee3f
Autor:
Anita Fadavi Roudsari, Daryoush Shiri, Hampus Renberg Nilsson, Giovanna Tancredi, Amr Osman, Ida-Maria Svensson, Marina Kudra, Marcus Rommel, Jonas Bylander, Vitaly Shumeiko, Per Delsing
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use the superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dff0c29c3b77ae7275243b4240053833
http://arxiv.org/abs/2209.07551
http://arxiv.org/abs/2209.07551