qubits
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Science
High-speed control technique enables record fidelity in superconducting qubits
In the artist’s impression of a recent MIT experiment, the sphere in the center represents a qubit, illuminated by two control signals: electric charge (blue) and magnetic flux (purple). These control signals are designed to combine to produce circularly polarized microwaves that are not affected by counter-rotation effects. The signals consist of repeating waveforms and represent the similarity of control…
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Nanotechnology
Researchers create direction-independent magnetic field-sensing nanotube spin qubits
Scanning electron microscopy image shows an atomic force microscope tip with boron nitride nanotubes containing spin qubits. Purdue researchers have developed a technology that detects off-axis magnetic fields with higher resolution than traditional diamond tips. Credit: Purdue University/Tongcang Li Researchers at Purdue University have developed patent-pending one-dimensional boron nitride nanotubes (BNNTs) containing spin qubits, or spin defects. BNNTs are more…
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Physics
Controlling light while measuring trapped ion qubits
AQM characterization scheme. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-50864-2 Quantum information is fragile and often difficult to protect during experiments. Protecting qubits from accidental measurements is essential for performing controlled quantum operations, especially when protocols such as quantum error correction involve measurements or resets that corrupt the state of neighboring qubits. Current methods for protecting atomic qubits from disturbances waste…
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