4.8 Article

Demonstration of a High-Fidelity CNOT Gate for Fixed-Frequency Transmons with Engineered ZZ Suppression

Related references

Note: Only part of the references are listed.
Article Quantum Science & Technology

Demonstration of quantum volume 64 on a superconducting quantum computing system

Petar Jurcevic et al.

Summary: This study improved the quality of quantum circuits on superconducting quantum computing systems by combining various methods, highlighting the importance of increasing coherence, control gate fidelities, measurement fidelities, and smarter software to achieve larger quantum systems in the future.

QUANTUM SCIENCE AND TECHNOLOGY (2021)

Article Physics, Multidisciplinary

Tunable Coupling Architecture for Fixed-Frequency Transmon Superconducting Qubits

J. Stehlik et al.

Summary: The article introduces a modified tunable bus architecture suitable for fixed-frequency qubits, achieving high-fidelity 2-qubit operations. Experimental results demonstrate a maximum gate fidelity of 99.85% with good calibration stability over one day.

PHYSICAL REVIEW LETTERS (2021)

Article Physics, Multidisciplinary

Realization of High-Fidelity CZ and ZZ-Free iSWAP Gates with a Tunable Coupler

Youngkyu Sung et al.

Summary: High-fidelity two-qubit gates are crucial for quantum computation and simulation, but current frameworks do not fully address three-body multilevel dynamics. A new systematic approach is presented to optimize control and achieve CZ and ZZ-free iSWAP gates with high fidelity. Experimental results show interaction fidelities close to T-1 limits.

PHYSICAL REVIEW X (2021)

Article Physics, Applied

Suppression of Static ZZ Interaction in an All-Transmon Quantum Processor

Peng Zhao et al.

Summary: Researchers have identified a promising parameter region in all-transmon systems that can significantly suppress the ZZ interaction while maintaining an adequate strength for the XY interaction to implement two-qubit gates. By implementing an iSWAP gate, they achieved fast gate speed and significantly lower conditional phase error. Scaling up to a large-scale transmon quantum processor could effectively suppress errors caused by the static ZZ interaction.

PHYSICAL REVIEW APPLIED (2021)

Article Physics, Applied

ZZ Freedom in Two-Qubit Gates

Xuexin Xu et al.

Summary: The study introduces a general theory to evaluate the static and dynamic repulsion between quantum bits, by combining different types of qubits, successfully eliminating parasitic interactions, improving the accuracy and fidelity of gate operations.

PHYSICAL REVIEW APPLIED (2021)

Article Physics, Multidisciplinary

Repeated quantum error detection in a surface code

Christian Kraglund Andersen et al.

NATURE PHYSICS (2020)

Article Physics, Multidisciplinary

Demonstrating a Continuous Set of Two-qubit Gates for Near-term Quantum Algorithms

B. Foxen et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Applied

Benchmarking Coherent Errors in Controlled-Phase Gates due to Spectator Qubits

S. Krinner et al.

PHYSICAL REVIEW APPLIED (2020)

Article Physics, Applied

Demonstration of an All-Microwave Controlled-Phase Gate between Far-Detuned Qubits

S. Krinner et al.

PHYSICAL REVIEW APPLIED (2020)

Article Physics, Multidisciplinary

Implementation of Conditional Phase Gates Based on Tunable ZZ Interactions

Michele C. Collodo et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Multidisciplinary

High-Fidelity, High-Scalability Two-Qubit Gate Scheme for Superconducting Qubits

Yuan Xu et al.

PHYSICAL REVIEW LETTERS (2020)

Article Quantum Science & Technology

Reducing Unitary and Spectator Errors in Cross Resonance with Optimized Rotary Echoes

Neereja Sundaresan et al.

PRX QUANTUM (2020)

Article Physics, Multidisciplinary

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

Peng Zhao et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Multidisciplinary

Suppression of Unwanted ZZ Interactions in a Hybrid Two-Qubit System

Jaseung Ku et al.

PHYSICAL REVIEW LETTERS (2020)

Article Optics

First-principles analysis of cross-resonance gate operation

Moein Malekakhlagh et al.

PHYSICAL REVIEW A (2020)

Article Optics

Effective Hamiltonian models of the cross-resonance gate

Easwar Magesan et al.

PHYSICAL REVIEW A (2020)

Article Physics, Multidisciplinary

Three-Qubit Randomized Benchmarking

David C. McKay et al.

PHYSICAL REVIEW LETTERS (2019)

Article Multidisciplinary Sciences

Quantum supremacy using a programmable superconducting processor

Frank Arute et al.

NATURE (2019)

Article Physics, Applied

Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit

Pranav Mundada et al.

PHYSICAL REVIEW APPLIED (2019)

Article Physics, Applied

Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates

Fei Yan et al.

PHYSICAL REVIEW APPLIED (2018)

Article Physics, Multidisciplinary

Experimental Demonstration of Fault-Tolerant State Preparation with Superconducting Qubits

Maika Takita et al.

PHYSICAL REVIEW LETTERS (2017)

Article Physics, Applied

Coherent Coupled Qubits for Quantum Annealing

Steven J. Weber et al.

PHYSICAL REVIEW APPLIED (2017)

Article Optics

Efficient Z gates for quantum computing

David C. Mckay et al.

PHYSICAL REVIEW A (2017)

Article Physics, Applied

Universal Gate for Fixed-Frequency Qubits via a Tunable Bus

David C. McKay et al.

PHYSICAL REVIEW APPLIED (2016)

Article Multidisciplinary Sciences

Superconducting quantum circuits at the surface code threshold for fault tolerance

R. Barends et al.

NATURE (2014)

Article Physics, Multidisciplinary

Qubit Architecture with High Coherence and Fast Tunable Coupling

Yu Chen et al.

PHYSICAL REVIEW LETTERS (2014)

Article Physics, Multidisciplinary

Microwave-activated conditional-phase gate for superconducting qubits

Jerry M. Chow et al.

NEW JOURNAL OF PHYSICS (2013)

Article Optics

Process verification of two-qubit quantum gates by randomized benchmarking

A. D. Corcoles et al.

PHYSICAL REVIEW A (2013)

Article Physics, Multidisciplinary

Entanglement of Two Superconducting Qubits in a Waveguide Cavity via Monochromatic Two-Photon Excitation

S. Poletto et al.

PHYSICAL REVIEW LETTERS (2012)

Article Physics, Multidisciplinary

Efficient Measurement of Quantum Gate Error by Interleaved Randomized Benchmarking

Easwar Magesan et al.

PHYSICAL REVIEW LETTERS (2012)

Article Physics, Multidisciplinary

Simple All-Microwave Entangling Gate for Fixed-Frequency Superconducting Qubits

Jerry M. Chow et al.

PHYSICAL REVIEW LETTERS (2011)

Article Multidisciplinary Sciences

Demonstration of two-qubit algorithms with a superconducting quantum processor

L. DiCarlo et al.

NATURE (2009)

Article Physics, Multidisciplinary

Controllable coupling of superconducting flux qubits

S. H. W. van der Ploeg et al.

PHYSICAL REVIEW LETTERS (2007)

Article Multidisciplinary Sciences

Resolving photon number states in a superconducting circuit

D. I. Schuster et al.

NATURE (2007)

Article Materials Science, Multidisciplinary

Microwave-induced coupling of superconducting qubits

G. S. Paraoanu

PHYSICAL REVIEW B (2006)