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Filtration00:53

Filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
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Related Experiment Video

Updated: Jun 26, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

An entanglement filter.

Ryo Okamoto1, Jeremy L O'Brien, Holger F Hofmann

  • 1Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan.

Science (New York, N.Y.)
|January 24, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed an optical entanglement filter for quantum information science. This device selectively passes photon pairs with specific polarization correlations, advancing multi-qubit filtering capabilities.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Technology

Background:

  • One-qubit filters (polarizers) are crucial in quantum information science.
  • Entanglement-based filtering necessitates multi-qubit filters with qubit-qubit interactions.

Purpose of the Study:

  • To demonstrate an optical entanglement filter.
  • To enable filtering of quantum states based on entanglement properties.

Main Methods:

  • Development of an optical device for filtering entangled photon pairs.
  • Utilizing polarization correlations to identify and pass desired quantum states.

Main Results:

  • Successfully demonstrated an optical entanglement filter.
  • The filter selectively passes photon pairs exhibiting specific polarization correlations.

Conclusions:

  • The demonstrated optical entanglement filter is a key advancement for quantum information processing.
  • This technology has significant applications in quantum technologies requiring entanglement manipulation.