Machine-learning based three-qubit gate for realization of a Toffoli gate with cQED-based transmon systems

@article{Daraeizadeh2019MachinelearningBT,
  title={Machine-learning based three-qubit gate for realization of a Toffoli gate with cQED-based transmon systems},
  author={Sahar Daraeizadeh and S. Premaratne and Xiaoyu Song and M. Perkowski and A. Matsuura},
  journal={ArXiv},
  year={2019},
  volume={abs/1908.01092}
}
We use machine learning techniques to design a 50 ns three-qubit flux-tunable controlled-controlled-phase gate with fidelity of >99.99% for nearest-neighbor coupled transmons in circuit quantum electrodynamics architectures. We explain our gate design procedure where we enforce realistic constraints, and analyze the new gate's robustness under decoherence, distortion, and random noise. Our controlled-controlled-phase gate in combination with two single-qubit gates realizes a Toffoli gate which… Expand
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References

SHOWING 1-10 OF 76 REFERENCES
Designing High-Fidelity Single-Shot Three-Qubit Gates: A Machine Learning Approach
TLDR
This work generates quantum-control procedures to design three types of three-qubit gates, namely Toffoli, Controlled-Not-Not and Fredkin gates, via the machine learning algorithm called Subspace-Selective Self-Adaptive Differential Evolution (SuSSADE). Expand
High-Fidelity Single-Shot Toffoli Gate via Quantum Control.
TLDR
A quantum-control procedure is developed to construct a single-shot Toffoli gate for three nearest-neighbor-coupled superconducting transmon systems such that the fidelity is 99.9% and is as fast as an entangling two-qubit gate under the same realistic conditions. Expand
Implementation of a Toffoli gate with superconducting circuits
TLDR
By exploiting the third energy level of the transmon qubits, the number of elementary gates needed for the implementation of the Toffoli gate is significantly reduced, relative to that required in theoretical proposals using only two-level systems. Expand
Quantum control for high-fidelity multi-qubit gates
TLDR
This work addresses quantum optimal control for single-shot multi-qubit gates by framing as a feasibility problem for the Hamiltonian model and then solving with standard global-optimization software. Expand
Quantum process tomography of a controlled-NOT gate.
We demonstrate complete characterization of a two-qubit entangling process--a linear optics controlled-NOT gate operating with coincident detection--by quantum process tomography. We use aExpand
Scalable Quantum Circuit and Control for a Superconducting Surface Code
TLDR
By pipelining the interaction and readout steps of ancilla-based X- and Z-type stabilizer measurements, this work can engineer detuning patterns that avoid all second-order transmon-transmon interactions except those exploited in controlled-phase gates, regardless of fabric size. Expand
Logic gates at the surface code threshold: Superconducting qubits poised for fault-tolerant quantum computing
TLDR
The results demonstrate that Josephson quantum computing is a high-fidelity technology, with a clear path to scaling up to large-scale, fault-tolerant quantum circuits. Expand
Quantum logic gates for coupled superconducting phase qubits.
Based on a quantum analysis of two capacitively coupled current-biased Josephson junctions, we propose two fundamental two-qubit quantum logic gates. Each of these gates, when supplemented byExpand
Realization of three-qubit quantum error correction with superconducting circuits
TLDR
This work encodes a quantum state, induce errors on the qubits and decode the error syndrome, which is used as the input to a three-qubit gate that corrects the primary qubit if it was flipped, and demonstrates the predicted first-order insensitivity to errors. Expand
On the CNOT-cost of TOFFOLI gates
TLDR
It is proved that the n-qubit analogue of the TOFFOLI requires at least 2n CNOT gates, and a complete classification of three-qu bit diagonaloperators by their CNOT-cost, which holds even if ancilla qubits are available. Expand
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