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Related Concept Videos

Network Function of a Circuit01:25

Network Function of a Circuit

Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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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. Schrödinger...
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Related Experiment Video

Updated: May 19, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Programmable multimode quantum networks.

Seiji Armstrong1, Jean-François Morizur, Jiri Janousek

  • 1Australian Centre for Quantum-Atom Optics, Department of Quantum Science, The Australian National University, Canberra, ACT 0200, Australia. seiji.armstrong@gmail.com

Nature Communications
|August 30, 2012
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate a flexible and scalable method for generating multimode entanglement, a key resource for quantum internet technologies. This new technique utilizes virtual optical networks and multi-pixel detectors for efficient creation of various entangled states.

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Quantum computing and communication

Background:

  • Multimode entanglement is crucial for advancing quantum technologies like the quantum internet.
  • Traditional methods for generating multimode entanglement often involve complex optical setups with beamsplitters and phase shifters.
  • There is a need for more versatile, efficient, and scalable approaches to multimode entanglement generation.

Purpose of the Study:

  • To develop a highly versatile and efficient method for generating various multimode entangled states.
  • To introduce flexibility and scalability into the generation of multimode entanglement.
  • To demonstrate the ability to switch between different linear optical networks in real time.

Main Methods:

  • Utilizing virtual optical networks that emulate physical linear optical networks.
  • Defining quantum modes as combinations of different spatial regions within a single beam.
  • Employing a single pair of multi-pixel detectors for measuring multiple entangled modes.

Main Results:

  • Successful generation of various multimode entangled states, including N=2, 3, and 4 cluster states, up to N=8 entangled modes.
  • Demonstration of real-time switching between different virtual linear optical networks.
  • Achieved high versatility and efficiency in generating multimode entanglement.

Conclusions:

  • The developed approach offers unprecedented flexibility and scalability for generating multimode entanglement.
  • This technique simplifies the experimental requirements by using multi-pixel detectors and virtual networks.
  • The findings pave the way for more advanced applications in quantum communication and computation.