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Researchers at Harvard have successfully extended the coherence time of diamond-based qubits by roughly threefold using continuous microscopic sound waves known as phonons. This breakthrough demonstrates that phonons can simultaneously protect quantum information and act as carriers for data transmission, potentially enabling compact, hybrid quantum networks directly integrated onto chips. The approach offers distinct advantages over optical methods by utilizing shorter wavelengths to pack components more densely while facilitating interactions between diverse qubit types.
Sources coveringScienceDaily, AI Alignment Forum, Quantum Frontiers, Quantum Computing Report
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Tiny sound waves could help solve a major quantum computing problem

ScienceDaily4 min read

Researchers at Harvard have demonstrated a way to protect quantum information using microscopic sound waves. By continuously surrounding a diamond-based qubit with mechanical vibrations, they extended its coherence time by roughly threefold. The same phonons could eventually both transmit and protect quantum information, opening the door to compact sound-based quantum networks on chips.

Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have demonstrated a new way to protect delicate quantum information using mechanical vibrations, essentially microscopic sound waves. The advance, developed in the lab of Marko Lončar, Tiantsai Lin Professor of Electrical Engineering, could support the development of compact quantum networks built directly onto chips. It may also help enable hybrid quantum systems that combine several different kinds of quantum bits,…

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