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Related Concept Videos

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Field Effect Transistor

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Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Single-Atom Transistor as a Precise Magnetic Field Sensor.

Krzysztof Jachymski1, Tomasz Wasak2, Zbigniew Idziaszek2

  • 1Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technologies (IQST), University of Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.

Physical Review Letters
|January 20, 2018
PubMed
Summary
This summary is machine-generated.

Ultracold atoms and Feshbach resonances can precisely measure external magnetic fields. This method achieves nanotesla precision using a single atom pair and simple measurements.

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Area of Science:

  • Atomic physics
  • Quantum optics
  • Quantum sensing

Background:

  • Feshbach resonances enable precise control over ultracold atom interactions using magnetic fields.
  • These resonances are crucial for manipulating the properties of quantum gases.

Purpose of the Study:

  • To propose a novel scheme for utilizing scattering resonances as a highly sensitive probe for external fields.
  • To demonstrate the potential for achieving high-precision measurements of magnetic fields.

Main Methods:

  • Employing Feshbach resonances in a system of ultracold atoms.
  • Carefully tuning system parameters to optimize sensitivity.
  • Utilizing a simple measurement protocol for data acquisition.

Main Results:

  • Achieving a precision level of 10^{-5} Gauss (or nanotesla) with a single pair of atoms.
  • Demonstrating that the quantum precision bound can be saturated.

Conclusions:

  • Scattering resonances offer a powerful tool for high-precision magnetic field sensing.
  • The proposed method is efficient, requiring only a single atom pair and a straightforward measurement protocol.