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Related Concept Videos

Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence01:23

Atomic Spectroscopy: Absorption, Emission, and Fluorescence

Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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,...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...

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Related Experiment Video

Updated: Jun 8, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Entanglement in atomic resonance fluorescence.

P Grünwald1, W Vogel

  • 1Arbeitsgruppe Quantenoptik, Institut für Physik, Universität Rostock, 18055 Rostock, Germany. peter.gruenwald2@uni-rostock.de

Physical Review Letters
|September 28, 2010
PubMed
Summary
This summary is machine-generated.

Resonance fluorescence from atomic systems creates continuous entangled radiation. This entangled radiation is more robust against dephasing than squeezing for multiple atoms, offering new applications.

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Related Experiment Videos

Last Updated: Jun 8, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

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Area of Science:

  • Quantum Optics
  • Atomic Physics
  • Quantum Information

Background:

  • Resonance fluorescence is a fundamental process in atomic systems.
  • Entangled radiation is crucial for quantum technologies.
  • Non-Gaussian states are essential for advanced quantum applications.

Purpose of the Study:

  • To demonstrate resonance fluorescence as a continuous source of non-Gaussian entangled radiation.
  • To investigate the conditions for entanglement in single- and multi-atom systems.
  • To compare the robustness of entanglement and squeezing against dephasing.

Main Methods:

  • Theoretical analysis of resonance fluorescence from atomic systems.
  • Investigation of quantum optical properties of emitted radiation.
  • Mathematical modeling of entanglement and squeezing dynamics.

Main Results:

  • Resonance fluorescence from atomic systems generates continuous non-Gaussian entangled radiation in two directions.
  • For a single atom, entanglement arises under the same conditions as squeezing.
  • Multi-atom systems exhibit entanglement more robust to dephasing than squeezing.

Conclusions:

  • Resonance fluorescence provides a viable continuous source of non-Gaussian entangled radiation.
  • Entanglement in multi-atom systems offers advantages over squeezing for robustness against dephasing.
  • This work opens avenues for practical applications of continuous entangled radiation sources.