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    Critical Thought

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    NTT Corporation and AIST Achieve Breakthrough in Quantum Current Standards

    BySam Figg

    Jan 25, 2024
    NTT Corporation and AIST Achieve Breakthrough in Quantum Current Standards

    NTT Corporation (NTT) and the National Institute of Advanced Industrial Science and Technology (AIST) have made a groundbreaking achievement in the field of quantum current standards. By utilizing silicon quantum dots, the researchers have successfully generated a stable and reliable electric current.

    The development of precise measurement technologies is crucial in various fields such as microfabrication, physics, and chemistry. To measure these currents accurately, a “current standard” is utilized. However, as the current becomes smaller, the relative uncertainty in measurements increases, posing a challenge for precise measurements, especially for nanoamperes or less.

    In this study, NTT and AIST focused on single-electron devices and precision current measurement technology to overcome this challenge. By combining NTT’s silicon quantum dot device with AIST’s precision current measurement tech, they compared currents generated by two independent silicon quantum dots and achieved a remarkable milestone. The two currents matched with an uncertainty of about 4×10^-7, and by combining them, the researchers successfully doubled the current while maintaining a small uncertainty.

    This breakthrough has significant implications for precise measurement technologies and could lead to advancements in current comparison and multiplication techniques. Furthermore, it ensures the consistency of the fundamental rules governing the microscopic world and has the potential to power multiple devices simultaneously.

    The collaborative efforts of NTT Corporation and AIST have garnered global recognition for their contribution to the development of quantum current standards. This achievement not only improves current measurement accuracy in semiconductor microfabrication, chemical measurement, and radiation measurement but also paves the way for future advancements in quantum technology.

    FAQ:

    1. What is the achievement made by NTT Corporation and AIST in the field of quantum current standards?
    NTT Corporation and AIST have successfully generated a stable and reliable electric current using silicon quantum dots.

    2. Why is precise measurement technology important?
    Precise measurement technology is crucial in various fields such as microfabrication, physics, and chemistry to ensure accurate and reliable measurements.

    3. What is a “current standard”?
    A “current standard” is a measurement tool used to accurately measure electric currents.

    4. What challenges arise when measuring smaller currents?
    As the current becomes smaller, the relative uncertainty in measurements increases, making precise measurements more challenging, especially for nanoamperes or less.

    5. How did NTT and AIST overcome the challenge of measuring small currents?
    NTT and AIST focused on single-electron devices and precision current measurement technology. By combining NTT’s silicon quantum dot device with AIST’s precision current measurement tech, they achieved a matched uncertainty of about 4×10^-7 and doubled the current while maintaining a small uncertainty.

    6. What implications does this breakthrough have?
    This breakthrough has significant implications for precise measurement technologies and could lead to advancements in current comparison and multiplication techniques. It also ensures consistency in the microscopic world’s fundamental rules and has the potential to power multiple devices simultaneously.

    7. What recognition have NTT Corporation and AIST received for their achievement?
    The collaborative efforts of NTT Corporation and AIST have garnered global recognition for their contribution to the development of quantum current standards.

    8. What are the potential applications of this achievement?
    This achievement improves current measurement accuracy in semiconductor microfabrication, chemical measurement, and radiation measurement. It also paves the way for future advancements in quantum technology.

    Definitions:
    – Quantum current standards: Precise measurement tools used to measure electric currents accurately.
    – Silicon quantum dots: Tiny particles of silicon that have unique quantum properties and can be used in various applications.
    – Nanoamperes: A unit of electric current equal to one billionth of an ampere.

    Related links:
    NTT Corporation
    National Institute of Advanced Industrial Science and Technology (AIST)