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This breakthrough integrates a Josephson voltage standard to achieve stable phase control and significant signal amplification in superconducting circuits, directly addressing long-standing noise limitations in quantum hardware. By enabling phase-sensitive gain and squeezing within a single DC-biased amplifier, this architecture advances the foundational components required for error correction and scalable quantum computing.

Sursă care acoperăQuantum Zeitgeist

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Researchers Boost Josephson Photonics Gain by 14 dB

Quantum Zeitgeist16 septembrie 20264 min de cititArticolul și perspectiva sunt în engleză.

Achieving a 14‑dB enhancement in signal amplification alongside improved noise represents a substantial leap forward for superconducting devices. Until now, limitations within Josephson Photonics have prevented stable phase control necessary for advanced operations like error correction. This new integration of a voltage standard delivers both phase-sensitive gain and squeezing within a single DC-biased amplifier, a capability previously unrealised.

A fourteen-decibel improvement in averaged gain was achieved along with improved quantum-limited noise performance within a new superconducting circuit architecture. A Josephson voltage standard integrated to create a stable phase reference for Josephson Photonics devices. This approach coherently transfers that reference to an inelastic Cooper-pair tunneling amplifier via the superconducting order parameter and also represents the first observation of phase-sensitive gain and squeezing in a dc-biased amplifier. An improved design for devices central to superconducting quantum technology…

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