Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates
By F. Yan, Philip Krantz, Youngkyu Sung, Morten Kjaergaard, D. Campbell, J. Wang, Terry P. Orlando, Simon Gustavsson, William D. Oliver. Physical Review Applied, 2018
394 citations recorded by the source corpus.
The prospect of computational hardware with quantum advantage relies critically on the quality of quantum gate operations. Imperfect two-qubit gates is a major bottleneck for achieving scalable quantum information processors. Here, we propose a generalizable and extensible scheme for a two-qubit coupler switch that controls the qubit-qubit coupling by modulating the coupler frequency. Two-qubit gate operations can be implemented by operating the coupler in the dispersive regime, which is non-invasive to the qubit states. We investigate the performance of the scheme by simulating a universal two-qubit gate on a superconducting quantum circuit, and find that errors from known parasitic effects are strongly suppressed. The scheme is compatible with existing high-coherence hardware, thereby promising a higher gate fidelity with current technologies.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/3225efdc2f3eb147caac32f68fcdaac65ee01c1f
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Artificial Intelligence
- William D. Oliver
- Youngkyu Sung
- J. Wang
- Terry P. Orlando
- Simon Gustavsson
- A. D. Paolo
- Alexandre Blais
- Steven M. Girvin
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- High fidelity two-qubit gates on fluxoniums using a tunable coupler (2022, background): “[16] Fei Yan, Philip Krantz, Youngkyu Sung, Morten Kjaergaard, Daniel L.”
- High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler (2023, background): “The operating principles of FTF are fundamentally different than those of all-transmon circuits [17].”
- On-demand directional microwave photon emission using waveguide quantum electrodynamics (2022, methodology): “Our device comprises of four frequency-tunable transmon qubits [55] and four tunable transmon couplers [56, 57] between each neighboring qubit pair, as shown in Fig.”