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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Sound Waves: Interference00:53

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Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Atomic Emission Spectroscopy: Interference01:30

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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Atomic Absorption Spectroscopy: Interference01:25

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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Phonon-Mediated Nonclassical Interference in Diamond.

Duncan G England1, Kent A G Fisher2, Jean-Philippe W MacLean2

  • 1National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada.

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Summary
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Researchers demonstrate quantum interference using a diamond quantum memory, enabling temporal separation of photon pathways. This breakthrough extends interference capabilities beyond the photon

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Solid-state quantum systems

Background:

  • Quantum interference is crucial for quantum computing and communication.
  • Temporal indistinguishability of photons is typically required for interference.
  • Existing methods face limitations due to short photon coherence times.

Purpose of the Study:

  • To demonstrate quantum interference between temporally separated photon pathways.
  • To utilize a diamond quantum memory to overcome coherence time limitations.
  • To enable new possibilities in photonic quantum protocols.

Main Methods:

  • Employing a diamond quantum memory as a light-matter beam splitter.
  • Mapping a single photon to a superposition of optical and phononic modes.
  • Storing one pathway in the quantum memory for temporal separation.

Main Results:

  • Achieved quantum interference between pathways separated by picoseconds, exceeding photon coherence time.
  • Demonstrated nonclassical single-photon and two-photon interference.
  • Showcased the diamond quantum memory's ability to buffer and manipulate quantum states.

Conclusions:

  • Diamond quantum memory enables temporal multiplexing for quantum interference.
  • This technique extends the effective coherence time for photonic interference.
  • Opens avenues for scalable quantum information processing and communication.