752 citations · 5k across the 50 of their papers we have counts for
48 papers
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…
Quantum circuit synthesis via a random combinatorial search
Sahel Ashhab, Fumiki Yoshihara, Miwako Tsuji +2
We use a random search technique to find quantum gate sequences that implement perfect quantum state preparation or unitary operator synthesis with arbitrary targets. This approach…
High-frequency suppression of inductive coupling between flux qubit and transmission line resonator
Sahel Ashhab, Ziqiao Ao, Fumiki Yoshihara +2
We perform theoretical calculations to investigate the naturally occurring high-frequency cutoff in a circuit comprising a flux qubit coupled inductively to a transmission line res…
Controlling qubit-oscillator systems using linear parameter sweeps
Sahel Ashhab, Tomoko Fuse, Fumiki Yoshihara +2
We investigate the dynamics of a qubit-oscillator system under the influence of a linear sweep of system parameters. We consider two main cases. In the first case, we consider swee…
Extremely large Lamb shift in a deep-strongly coupled circuit QED system with a multimode resonator
Ziqiao Ao, Sahel Ashhab, Fumiki Yoshihara +5
We report experimental and theoretical results on the extremely large Lamb shift in a multimode circuit quantum electrodynamics (QED) system in the deep-strong coupling (DSC) regim…
Numerical analysis of quantum circuits for state preparation and unitary operator synthesis
Sahel Ashhab, Naoki Yamamoto, Fumiki Yoshihara +1
We perform optimal-control-theory calculations to determine the minimum number of two-qubit CNOT gates needed to perform quantum state preparation and unitary operator synthesis fo…