Zobrazeno 1 - 10
of 2 170
pro vyhledávání: '"Catelani, A."'
In quantum information processing, a tension between two different tasks occurs: while qubits' states can be preserved by isolating them, quantum gates can be realized only through qubit-qubit interactions. In arrays of qubits, weak coupling leads to
Externí odkaz:
http://arxiv.org/abs/2410.18543
A ring of capacitively-coupled transmons threaded by a synthetic magnetic field is studied as a realization of a strongly interacting bosonic system. The synthetic flux is imparted through a specific Floquet modulation scheme based on a suitable peri
Externí odkaz:
http://arxiv.org/abs/2409.06511
Autor:
Marchegiani, G., Catelani, G.
Qubits with gap asymmetry larger than their transition energy are less susceptible to quasiparticle decoherence as the quasiparticles are mostly trapped in the low-gap side of the junction. Because of this trapping, the gap asymmetry can contribute t
Externí odkaz:
http://arxiv.org/abs/2408.17218
Publikováno v:
Phys. Rev. Applied 22, 044063 (2024)
Recent research shows that quasiparticle-induced decoherence of superconducting qubits depends on the superconducting-gap asymmetry originating from the different thicknesses of the top and bottom films in Al/AlO$_x$/Al junctions. Magnetic field is a
Externí odkaz:
http://arxiv.org/abs/2403.03351
Autor:
Janssen, L. M., Butseraen, G., Krause, J., Coissard, A., Planat, L., Roch, N., Catelani, G., Ando, Yoichi, Dickel, C.
Publikováno v:
Phys. Rev. Applied 22, 054018 (2024)
We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave parametric amplifier (TWPA). We show that the observed change in photonic bandgap and plasma frequency of the TWPA can be modeled by considering the suppressio
Externí odkaz:
http://arxiv.org/abs/2402.19398
Autor:
Yelton, Eric, Larson, Clayton P., Iaia, Vito, Dodge, Kenneth, La Magna, Guglielmo, Baity, Paul G., Pechenezhskiy, Ivan V., McDermott, Robert, Kurinsky, Noah, Catelani, Gianluigi, Plourde, Britton L. T.
Publikováno v:
Physical Review B 110, 024519 (2024)
Correlated errors caused by ionizing radiation impacting superconducting qubit chips are problematic for quantum error correction. Such impacts generate quasiparticle (QP) excitations in the qubit electrodes, which temporarily reduce qubit coherence
Externí odkaz:
http://arxiv.org/abs/2402.15471
Autor:
Mörstedt, Timm Fabian, Teixeira, Wallace Santos, Viitanen, Arto, Kivijärvi, Heidi, Tiiri, Maaria, Rasola, Miika, Gunyho, Andras Marton, Kundu, Suman, Lattier, Louis, Vadimov, Vasilii, Catelani, Gianluigi, Sevriuk, Vasilii, Heinsoo, Johannes, Räbinä, Jukka, Ankerhold, Joachim, Möttönen, Mikko
We experimentally demonstrate the fast generation of thermal states of a transmon using a single-junction quantum-circuit refrigerator (QCR) as an in-situ-tunable environment. Through single-shot readout, we monitor the transmon up to its third-excit
Externí odkaz:
http://arxiv.org/abs/2402.09594
Autor:
Fischer, P. B., Catelani, G.
Publikováno v:
SciPost Phys. 17, 070 (2024)
Many superconducting devices rely on the finite gap in the excitation spectrum of a superconductor: thanks to this gap, at temperatures much smaller than the critical one the number of excitations (quasiparticles) that can impact the device's behavio
Externí odkaz:
http://arxiv.org/abs/2401.12607
Autor:
Benevides, Rodrigo, Drimmer, Maxwell, Bisson, Giacomo, Adinolfi, Francesco, von Lüpke, Uwe, Doeleman, Hugo Michiel, Catelani, Gianluigi, Chu, Yiwen
Publikováno v:
Phys. Rev. Lett. 133, 060602 (2024)
A known source of decoherence in superconducting qubits is the presence of broken Cooper pairs, or quasiparticles. These can be generated by high-energy radiation, either present in the environment or purposefully introduced, as in the case of some h
Externí odkaz:
http://arxiv.org/abs/2312.05892
Autor:
Willsch, Dennis, Rieger, Dennis, Winkel, Patrick, Willsch, Madita, Dickel, Christian, Krause, Jonas, Ando, Yoichi, Lescanne, Raphaël, Leghtas, Zaki, Bronn, Nicholas T., Deb, Pratiti, Lanes, Olivia, Minev, Zlatko K., Dennig, Benedikt, Geisert, Simon, Günzler, Simon, Ihssen, Sören, Paluch, Patrick, Reisinger, Thomas, Hanna, Roudy, Bae, Jin Hee, Schüffelgen, Peter, Grützmacher, Detlev, Buimaga-Iarinca, Luiza, Morari, Cristian, Wernsdorfer, Wolfgang, DiVincenzo, David P., Michielsen, Kristel, Catelani, Gianluigi, Pop, Ioan M.
Publikováno v:
Nat. Phys. 20, 815 (2024)
Approaches to developing large-scale superconducting quantum processors must cope with the numerous microscopic degrees of freedom that are ubiquitous in solid-state devices. State-of-the-art superconducting qubits employ aluminum oxide (AlO$_x$) tun
Externí odkaz:
http://arxiv.org/abs/2302.09192