High-Contrast ZZ Interaction Using Superconducting Qubits with Opposite-Sign Anharmonicity.

@article{Zhao2020HighContrastZI,
  title={High-Contrast ZZ Interaction Using Superconducting Qubits with Opposite-Sign Anharmonicity.},
  author={Peng Zhao and P. Xu and D. Lan and Ji Chu and X. Tan and Haifeng Yu and Yang Yu},
  journal={Physical review letters},
  year={2020},
  volume={125 20},
  pages={
          200503
        }
}
For building a scalable quantum processor with superconducting qubits, ZZ interaction is of great concern because its residual has a crucial impact to two-qubit gate fidelity. Two-qubit gates with fidelity meeting the criterion of fault-tolerant quantum computation have been demonstrated using ZZ interaction. However, as the performance of quantum processors improves, the residual static ZZ can become a performance-limiting factor for quantum gate operation and quantum error correction. Here… Expand
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References

SHOWING 1-10 OF 59 REFERENCES
Simple all-microwave entangling gate for fixed-frequency superconducting qubits.
TLDR
An all-microwave two-qubit gate on superconducting qubits which are fixed in frequency at optimal bias points and tunable via the amplitude of microwave irradiation on one qubit at the transition frequency of the other is demonstrated. Expand
Spin-Orbit Coupling Effects in Two-Dimensional
  • Electron and Hole System (Springer,
  • 2003
d.
TLDR
The novel JEV RT-NASBA assay could be used as an efficient molecular biology tool to diagnose JEV, which would facilitate the surveillance of reproductive failure disease in swine and would be beneficial for public health security. Expand
Protecting quantum entanglement from leakage and qubit errors via repetitive parity measurements
TLDR
This work investigates how two-transmon entangled states evolve under repeated parity measurements and demonstrates the use of hidden Markov models to detect leakage using only the record of parity measurement outcomes required for QEC. Expand
A fast, low-leakage, high-fidelity two-qubit gate for a programmable superconducting quantum computer
A common approach to realize conditional-phase (CZ) gates in transmon qubits relies on flux control of the qubit frequency to make computational states interact with non-computational ones using aExpand
Calibration of a Cross-Resonance Two-Qubit Gate Between Directly Coupled Transmons
Quantum computation requires the precise control of the evolution of a quantum system, typically through application of discrete quantum logic gates on a set of qubits. Here, we use theExpand
Diabatic Gates for Frequency-Tunable Superconducting Qubits.
TLDR
Diabatic two-qubit gates with Pauli error rates down to 4.3(2)×10^{-3} in as fast as 18 ns using frequency-tunable superconducting qubits are demonstrated by synchronizing the entangling parameters with minima in the leakage channel. Expand
Entanglement stabilization using ancilla-based parity detection and real-time feedback in superconducting circuits
TLDR
The ability to stabilize parity over multiple feedback rounds with no further reduction in fidelity provides strong evidence for the feasibility of executing stabilizer codes on timescales much longer than the intrinsic coherence times of the constituent qubits. Expand
Fast, High-Fidelity Conditional-Phase Gate Exploiting Leakage Interference in Weakly Anharmonic Superconducting Qubits.
TLDR
A 40 ns cz gate based on a bipolar flux pulse suppressing leakage by interference and approaching the speed limit set by exchange coupling is presented, which is robust to long-timescale distortion in the flux-control line, ensuring repeatability. Expand
Quantum supremacy using a programmable superconducting processor
TLDR
Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times, which would take a state-of-the-art supercomputer around ten thousand years to compute. Expand
...
1
2
3
4
5
...