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The de Broglie Wavelength02:32

The de Broglie Wavelength

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...
Interference and Diffraction02:18

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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.
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

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Related Experiment Video

Updated: Jun 23, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Quantum interference effects in a femtosecond-dephasing medium.

H Nishioka, H Koutaka, K Ueda

    Optics Express
    |May 8, 2009
    PubMed
    Summary

    Coherence control was demonstrated in a three-level system with ultrafast dephasing. Researchers manipulated coherences using intense supercontinuum and a double-pulse scheme to control the light-matter interaction phase.

    Area of Science:

    • Quantum optics
    • Ultrafast spectroscopy

    Background:

    • Coherence control is crucial for quantum information processing.
    • Ultrafast dephasing times (<10 fs) present significant challenges.

    Purpose of the Study:

    • To demonstrate coherence control in a three-level system with ultrafast dephasing.
    • To explore the use of supercontinuum and double-pulse pumping for coherence manipulation.

    Main Methods:

    • Utilized a _ -type three-level system.
    • Excited coherences using an intense supercontinuum source.
    • Employed a double-pulse pumping scheme to control interaction phase.

    Main Results:

    • Successfully demonstrated coherence control despite ultrafast dephasing.

    More Related Videos

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    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

    Related Experiment Videos

    Last Updated: Jun 23, 2026

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
    15:58

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

    Published on: December 3, 2013

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    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

  • Achieved terahertz Rabi frequencies through supercontinuum excitation.
  • Showcased phase-dependent control of coherences.

    • Conclusions:

    • Coherence control is feasible even with extremely short dephasing times.
    • Supercontinuum and tailored pulse sequences offer a viable method for manipulating quantum coherences.