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Quantum conductance: Difference between revisions
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(Created page with "== Introduction == Quantum conductance is a fundamental concept in the field of quantum mechanics and condensed matter physics. It describes the quantized nature of electrical conductance in nanoscale systems, such as quantum wires and quantum dots. This phenomenon arises due to the wave-like properties of electrons and the discrete energy levels that they occupy in confined systems. Quantum conductance plays a crucial role in the development of modern nanotechnology and...") |
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Quantum point contacts (QPCs) are narrow constrictions between two wider electron reservoirs. They are commonly used to study quantum conductance. When the width of the QPC is comparable to the electron wavelength, the conductance becomes quantized. This quantization is observed as a series of plateaus in the conductance versus gate voltage plot, with each plateau corresponding to an integer multiple of \( G_0 \). | Quantum point contacts (QPCs) are narrow constrictions between two wider electron reservoirs. They are commonly used to study quantum conductance. When the width of the QPC is comparable to the electron wavelength, the conductance becomes quantized. This quantization is observed as a series of plateaus in the conductance versus gate voltage plot, with each plateau corresponding to an integer multiple of \( G_0 \). | ||
[[Image:Detail-92787.jpg|thumb|center|A quantum point contact device under a microscope.]] | |||
=== Quantum Dots === | === Quantum Dots === | ||