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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Electrical engineering

Background:

  • Quantum zero-point fluctuations manifest as van der Waals and Casimir forces, typically linked to electromagnetic vacuum fluctuations.
  • These forces are crucial in understanding phenomena at microscopic scales.

Purpose of the Study:

  • To investigate generalized fluctuation potentials acting on internal degrees of freedom within electrical circuits.
  • To explore electronic Casimir-like potentials induced by zero-point current fluctuations in conductive circuits.

Main Methods:

  • Theoretical analysis of fluctuation potentials in general conductive circuits.
  • Application of the analysis to specific systems: an electromechanical capacitor and a superconducting qubit.

Main Results:

  • Identified electronic Casimir-like potentials arising from zero-point current fluctuations.
  • Demonstrated tunable forces in an electromechanical capacitor and tunable level shifts in a superconducting qubit.

Conclusions:

  • Electronic Casimir-like potentials offer an alternative route for exploring fluctuation potentials.
  • These tunable potentials have potential applications in future nanoelectromechanical and quantum technologies.