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This research presents a significant theoretical breakthrough for soft 0-π qubits by demonstrating simulated two-qubit entanglement with 99.9% fidelity, overcoming a critical hurdle in scaling quantum processors. The proposed unprotected CZ gate enables essential multi-qubit operations that were previously impossible for this specific qubit architecture, directly advancing the feasibility of complex quantum calculations.
Researchers Simulate Near-Error-Free Qubit Coupling with 99.9% Fidelity
Until now, building complex quantum calculations with soft 0-π qubits required overcoming a fundamental limitation: control beyond single qubit operations. Simulations reveal a newly proposed CZ gate achieving approximately 99. 9% fidelity in just 160 nanoseconds, demonstrating two-qubit entanglement where previously only individual qubit manipulation was possible.
Creating a two-qubit gate for soft 0-π qubits remained an open challenge despite recent demonstrations of single-qubit control in this promising qubit type. Zhenxing Liu, Eli Weissler, and Joshua Combes have proposed an unprotected CZ gate, a fundamental building block for quantum computation, specifically designed for capacitively coupled soft 0-π qubits. A new method controls interactions between quantum bits known as 0-π qubits, achieving remarkably high accuracy in simulations. These qubits offer potential advantages over existing designs by promising longer information storage…
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