TUM researchers demonstrate 99.62% fidelity two-qubit gate with P-mon superconducting qubits

@QuantumStateX

6d ago· 5 min readenNews

Summary

Researchers at the Technical University of Munich, led by Frederik Pfeiffer, have demonstrated a high-fidelity two-qubit gate using multimode superconducting P-mon qubits. The CZ gate achieved 99.62% fidelity in 180 nanoseconds while reducing unwanted ZZ-type interactions to below 3.6 kHz, marking a significant step toward scalable quantum processors.

Source

bskyTUM researchers demonstrate 99.62% fidelity two-qubit gate with P-mon superconducting qubitsiq.fp2.dev

Key quotes

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Achieving a CZ gate with a duration of 180 nanoseconds and a fidelity of 99.62 ±0.04%, represents a significant advance in the development of scalable superconducting quantum architectures.

By carefully exploiting the mediator modes intrinsic to P-mon qubits, they successfully reduced unwanted ZZ-type interactions to below 3.6 ±0.5kHz, thereby preserving qubit coherence and paving the way for larger, more stable quantum processors.

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A near-perfect two-qubit gate, achieving 99. 62% fidelity, has been demonstrated using a novel superconducting qubit design. This result drastically reduces unwanted interactions to below 3.

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