Implementation of a Walsh-Hadamard Gate in a Superconducting Qutrit
M. A. Yurtalan, J. Shi, M. Kononenko, A. Lupascu, S. Ashhab
DOI 10.1103/PhysRevLett.125.180504 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We have implemented a Walsh-Hadamard gate, which performs a quantum Fourier transform, in a superconducting qutrit. The qutrit is encoded in the lowest three energy levels of a capacitively shunted flux device, operated at the optimal flux-symmetry point. We use an efficient decomposition of the Walsh-Hadamard gate into two unitaries, generated by off-diagonal and diagonal Hamiltonians, respectively. The gate implementation utilizes simultaneous driving of all three transitions between the three pairs of energy levels of the qutrit, one of which is implemented with a two-photon process. The gate has a duration of 35 ns and an average fidelity over a representative set of states, including preparation and tomography errors, of 99.2%, characterized with quantum-state tomography. Compensation of ac-Stark and Bloch-Siegert shifts is essential for reaching high gate fidelities.
Similar papers
Characterization of control in a superconducting qutrit using randomized benchmarking
similarity 0.90M. Kononenko et al.
Source status unknown — claims are unverified
Efficient two-qutrit gates in superconducting circuits using parametric coupling
similarity 0.89Mahadevan Subramanian & Adrian Lupascu
Source status unknown — claims are unverified
Controllable Coherent Population Transfers in Superconducting Qubits for Quantum Computing
similarity 0.88L. F. Wei et al.
Source status unknown — claims are unverified
Quantum Logic Gates for Coupled Superconducting Phase Qubits
similarity 0.88Frederick W. Strauch et al.
Source status unknown — claims are unverified
Robust, fast, and high-fidelity composite single-qubit gates for superconducting transmon qubits
similarity 0.87Hristo G. Tonchev et al.
Source status unknown — claims are unverified
Implementation of adiabatic Abelian geometric gates with superconducting phase qubits
similarity 0.86Z. H. Peng et al. · 2006 · arXiv:quant-ph/0610120
Source status unknown — claims are unverified