41 citations · 214 across the 10 of their papers we have counts for
10 papers
Identifying impurities in a silicon substrate by using a superconducting flux qubit
Hiraku Toida, Kosuke Kakuyanagi, Leonid V. Abdurakhimov +3
A bismuth-doped silicon substrate was analyzed by using a magnetometer based on a superconducting flux qubit. The temperature dependence of the magnetization indicates that the sil…
Superconducting flux qubit with ferromagnetic Josephson -junction operating at zero magnetic field
Sunmi Kim, Leonid V. Abdurakhimov, Duong Pham +6
Conventional superconducting flux qubits require the application of a precisely tuned magnetic field to set the operation point at half a flux quantum through the qubit loop, which…
Identification of different types of high-frequency defects in superconducting qubits
Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida +3
Parasitic two-level-system (TLS) defects are one of the major factors limiting the coherence times of superconducting qubits. Although there has been significant progress in charac…
Spin resonance linewidths of bismuth donors in silicon coupled to planar microresonators
James O'Sullivan, Oscar W. Kennedy, Christoph W. Zollitsch +5
Ensembles of bismuth donor spins in silicon are promising storage elements for microwave quantum memories due to their long coherence times which exceed seconds. Operating an effic…
Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements
Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida +3
It is widely known that spin-locking noise-spectroscopy is a powerful technique for the characterization of low-frequency noise mechanisms in superconducting qubits. Here we show t…
A long-lived capacitively shunted flux qubit embedded in a 3D cavity
Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida +2
We report the experimental realization of a 3D capacitively-shunt superconducting flux qubit with long coherence times. At the optimal flux bias point, the qubit demonstrates energ…
Magnon-photon coupling in a non-collinear magnetic insulator CuOSeO
L. V. Abdurakhimov, S. Khan, N. A. Panjwani +6
Anticrossing behavior between magnons in a non-collinear chiral magnet CuOSeO and a two-mode X-band microwave resonator was studied in the temperature range 5-100K. In the…
On the nonlinear NMR and magnon BEC in antiferromagnetic materials with coupled electron-nuclear spin precession
L. V. Abdurakhimov, M. A. Borich, Yu. M. Bunkov +4
We present a new study of nonlinear NMR and Bose-Einstein Condensation (BEC) of nuclear spin waves in antiferromagnetic MnCO3 with coupled electron and nuclear spins. In particular…
Strong coupling of the cyclotron motion of surface electrons on liquid helium to a microwave cavity
L. V. Abdurakhimov, R. Yamashiro, A. O. Badrutdinov +1
The strong coupling regime is observed in a system of two-dimensional electrons whose cyclotron motion is coupled to an electro-magnetic mode in a Fabry-Perot cavity resonator. The…
Photo-Conductivity Response at Cyclotron-Resonance Harmonics in a Non-Degenerate 2D Electron Gas on Liquid Helium
R. Yamashiro, L. V. Abdurakhimov, A. O. Badrutdinov +2
We report the first observation of an oscillatory photo-conductivity response at the cyclotron-resonance harmonics in a non-degenerate 2D electron system formed on the free surface…