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Related Concept Videos

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,...
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,...
Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.

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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Ramsey interferometry with an atom laser.

D Döring1, J E Debs, N P Robins

  • 1Australian Research Council Centre of Excellence for Quantum-Atom Optics, The Australian National University, ACT 0200, Australia. daniel.doering@anu.edu.au

Optics Express
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

We demonstrate a free-space atom interferometer using Bose-condensed Rubidium-87 atoms. This system achieves high-visibility fringes and shows potential for testing squeezed atomic states.

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Area of Science:

  • Atomic Physics
  • Quantum Optics
  • Quantum Information Science

Background:

  • Atom interferometers are crucial for precision measurements.
  • Bose-Einstein condensates offer unique properties for interferometry.
  • Magnetically insensitive transitions minimize environmental noise.

Purpose of the Study:

  • To present results from a free-space atom interferometer.
  • To investigate its performance using Bose-condensed Rubidium-87 atoms.
  • To assess its suitability for testing squeezed atomic states.

Main Methods:

  • Utilizing a magnetically insensitive ground state transition (|F = 1,mF = 0) --> |F = 2,mF = 0).
  • Employing a pulsed atom laser output-coupled from a Bose-Einstein condensate.
  • Implementing internal state beam splitters via coherent Raman transitions.

Main Results:

  • Observation of Ramsey fringes with near 100% visibility.
  • Determination of current and achievable interferometric phase sensitivity.
  • Demonstration of a robust free-space atom interferometer.

Conclusions:

  • The developed atom interferometer is highly effective.
  • The system's performance is well-suited for advanced quantum state manipulation.
  • It provides a promising platform for future quantum metrology and sensing applications.