172 citations · 686 across the 9 of their papers we have counts for
9 papers
Silent Phase Qubit Based on d-Wave Josephson Junctions
M. H. S. Amin, A. Yu. Smirnov, A. M. Zagoskin +4
We report on design and fabrication of a new type of flux qubit that capitalizes on intrinsic properties of submicron YBCO grain boundary junctions. The operating point is protecte…
Observation of macroscopic Landau-Zener transitions in a superconducting device
A. Izmalkov, M. Grajcar, E. Il'ichev +7
A two-level system traversing a level anticrossing has a small probability to make a so-called Landau-Zener (LZ) transition between its energy bands, in deviation from simple adiab…
Quasiparticle Decoherence in d-wave Superconducting Qubits
M. H. S. Amin, A. Yu. Smirnov
It is usually argued that the presence of gapless quasiparticle excitations at the nodes of the d-wave superconducting gap should strongly decohere the quantum states of a d-wave q…
Low-frequency measurement of the tunneling amplitude in a flux qubit
M. Grajcar, A. Izmalkov, E. Il'ichev +13
We have observed signatures of resonant tunneling in an Al three-junction qubit, inductively coupled to a Nb LC tank circuit. The resonant properties of the tank oscillator are sen…
Continuous Monitoring of Rabi Oscillations in a Josephson Flux Qubit
E. Il'ichev, N. Oukhanski, A. Izmalkov +7
Under resonant irradiation, a quantum system can undergo coherent (Rabi) oscillations in time. We report evidence for such oscillations in a _continuously_ observed three-Josephson…
Low-frequency characterization of quantum tunneling in flux qubits
Ya. S. Greenberg, A. Izmalkov, M. Grajcar +5
We propose to investigate flux qubits by the impedance measurement technique (IMT), currently used to determine the current--phase relation in Josephson junctions. We analyze in de…