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Related Concept Videos

Quantum Numbers02:43

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Chip-based quantum key distribution.

P Sibson1, C Erven1, M Godfrey1

  • 1Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.

Nature Communications
|February 10, 2017
PubMed
Summary
This summary is machine-generated.

Chip-based quantum key distribution (QKD) offers enhanced security for information transmission. This study demonstrates GHz-clocked QKD operation on integrated indium phosphide and silicon oxynitride chips, paving the way for telecommunications network integration.

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Area of Science:

  • Quantum Information Science
  • Integrated Photonics
  • Cybersecurity

Background:

  • Secure information transmission is critical for governments, corporations, and individuals.
  • Quantum Key Distribution (QKD) offers physics-based security but faces adoption challenges.
  • Chip-based devices are essential for QKD's performance, miniaturization, and functionality.

Purpose of the Study:

  • To develop and demonstrate chip-based Quantum Key Distribution (QKD) devices.
  • To achieve high-speed, low-error rate QKD operation using integrated photonic circuits.
  • To showcase the versatility of integrated QKD devices for multiple protocols.

Main Methods:

  • Monolithic integration of indium phosphide transmitter and silicon oxynitride receiver chips.
  • Utilizing telecommunications industry components and manufacturing processes.
  • Demonstrating three prominent QKD protocols (BB84, Coherent One Way, Differential Phase Shift) on the integrated platform.

Main Results:

  • Achieved low error rate, GHz-clocked QKD operation.
  • Demonstrated comparable performance to state-of-the-art QKD systems.
  • Successfully operated multiple QKD protocols on the reconfigurable integrated devices.

Conclusions:

  • Integrated chip-based QKD devices are feasible using telecommunications manufacturing.
  • These devices enable high-performance, miniaturized, and versatile QKD systems.
  • The integrated devices, with single photon detectors, are poised for integration into future telecommunications networks.