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Energy Stored in Inductors01:16

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An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
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An inductor is a passive component built to store energy within its magnetic field. It can be fabricated by coiling a wire around a magnetic core. When current is permitted to flow through this inductor, it is observed that the voltage across the inductor is directly proportional to the time rate of change of the current. Mathematically,
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To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
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Tuning Superinductors by Quantum Coherence Effects for Enhancing Quantum Computing.

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Researchers found that increasing disorder in superconducting thin films exponentially enhances kinetic inductance while maintaining a high quality factor. This suggests potential for improved superinductor performance in quantum devices.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials

Background:

  • Recent experimental interest in spatially inhomogeneous weakly coupled superconductors.
  • Observed dramatic enhancement of kinetic inductance with low losses.

Purpose of the Study:

  • Investigate kinetic inductance and quality factor in strongly disordered, weakly coupled superconducting thin films.
  • Analyze the impact of disorder and quantum coherence on superinductor properties.

Main Methods:

  • Employed a gauge-invariant random-phase approximation.
  • Modeled collective excitations and fluctuations.
  • Studied disordered superconducting thin films.

Main Results:

  • Found exponential increase in kinetic inductance with disorder at low temperatures and relevant frequencies.
  • Observed a high quality factor (∼10^4) alongside enhanced inductance.
  • Identified quantum coherence effects on the metallic side of the superconductor-insulator transition, leading to a disorder-dependent quality factor distribution.

Conclusions:

  • Findings support experimental observations and theoretical understanding of superinductor behavior.
  • Suggests potential for optimizing superinductors for quantum circuits and detectors.
  • Highlights the role of disorder and quantum coherence in tuning superinductor performance.