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This article is cited in 7 scientific papers (total in 7 papers)
QUANTUM INFORMATION SCIENCE
Planar architecture for studying a fluxonium qubit
I. N. Moskalenkoa, I. S. Besedina, I. A. Tsitsilinab, G. S. Mazhorinb, N. N. Abramova, A. Grigor'eva, I. A. Rodionovcd, A. A. Dobronosovacd, D. O. Moskalevc, A. A. Pishchimovacd, A. V. Ustinovaef a National University of Science and Technology MISIS, Moscow, 119049 Russia
b Moscow Institute of Physics and Technology (National Research University),
Dolgoprudnyi, Moscow region, 141701 Russia
c Bauman Moscow State Technical University, Moscow, 105005 Russia
d All-Russia Research Institute of Automatics, Moscow, 127055 Russia
e Physikalisches Institut, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
f Russian Quantum Center, Skolkovo, Moscow region, 143025 Russia
Abstract:
The spectral and temporal characteristics of a fluxonium qubit coupled to a coplanar resonator on a chip have been experimentally studied. The system has been implemented as a planar integral electric circuit, where the fluxonium qubit itself consists of a tunnel Josephson junction with a small area shunted by a high inductance of a series of Josephson junctions with larger areas. To analyze the experimental data, an extended model of the fluxonium qubit capacitively coupled to the resonator has been proposed, and the structure of the energy levels has been obtained by full diagonalization of the Hamiltonian of the system. Numerical predictions of the model allow interpreting the results of two-tone spectroscopy obtained at various external magnetic fluxes in a wide frequency range.
Received: 18.09.2019 Revised: 18.09.2019 Accepted: 24.09.2019
Citation:
I. N. Moskalenko, I. S. Besedin, I. A. Tsitsilin, G. S. Mazhorin, N. N. Abramov, A. Grigor'ev, I. A. Rodionov, A. A. Dobronosova, D. O. Moskalev, A. A. Pishchimova, A. V. Ustinov, “Planar architecture for studying a fluxonium qubit”, Pis'ma v Zh. Èksper. Teoret. Fiz., 110:8 (2019), 569–574; JETP Letters, 110:8 (2019), 574–579
Linking options:
https://www.mathnet.ru/eng/jetpl6030 https://www.mathnet.ru/eng/jetpl/v110/i8/p569
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