Andrew G Manning

Andrew G Manning
Australian Nuclear Science and Technology Organisation | ANSTO · Australian Centre for Neutron Scattering

Doctor of Philosophy

About

17
Publications
1,345
Reads
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410
Citations
Introduction
Instrument scientist for 3He polarisation used in neutron scattering experiments
Additional affiliations
February 2020 - present
Australian Nuclear Science and Technology Organisation
Position
  • Researcher
April 2014 - February 2020
Australian Nuclear Science and Technology Organisation
Position
  • Sample environment officer
February 2011 - June 2013
Australian National University
Position
  • Lecturer
Description
  • PHYS2013: Quantum mechanics
Education
February 2010 - February 2014
Australian National University
Field of study
  • Quantum atom optics
February 2006 - November 2009
Australian National University
Field of study
  • Physics

Publications

Publications (17)
Article
Full-text available
Top-loading exchange gas cryostats have for a long time been a widely used sample environment device for a variety of neutron scattering experiments. In particular, they allow for simpler and faster changes of samples mounted on sample-positioning probes than is possible with bottom-loading cryostats under vacuum. Here, a new design for sample prob...
Article
The wave-particle dual nature of light and matter and the fact that the choice of measurement determines which one of these two seemingly incompatible behaviours we observe are examples of the counterintuitive features of quantum mechanics. They are illustrated by Wheeler's famous 'delayed-choice experiment, recently demonstrated in a single-photon...
Article
An important aspect of the rapidly growing field of quantum atom optics is exploring the behavior of ultracold atoms at a deeper level than the mean field approximation, where the quantum properties of individual atoms becomes important. Major recent advances have been achieved with the creation and detection of reliable single-atom sources, which...
Thesis
Full-text available
The field of atom optics has progressed rapidly over the past 20 years since the realisation of Bose-Einstein condensation, such that the wave behaviour of atomic gases is now routinely demonstrated. Furthermore, the study of quantum atom optics, which goes beyond a ‘mean-field’ description of quantum systems to consider the behaviour of single par...
Article
Full-text available
A fundamental property of a three-dimensional Bose-Einstein condensate is long-range coherence; however, in systems of lower dimensionality, not only is the long-range coherence destroyed but additional states of matter are predicted to exist. One such state is a "transverse condensate," first predicted by van Druten and Ketterle [Phys. Rev. Lett....
Article
Full-text available
In 1963 Glauber introduced the modern theory of quantum coherence, which extended the concept of first-order (one-body) correlations, describing phase coherence of classical waves, to include higher-order (n-body) quantum correlations characterizing the interference of multiple particles. Whereas the quantum coherence of photons is a mature corners...
Article
Full-text available
We present here the first measurement of the third-order spatial correlation function for atoms, made possible by cooling a metastable helium cloud to create an ultracold thermal ensemble just above the Bose–Einstein condensation point. The resulting large correlation length well exceeds the spatial resolution limit of the single-atom detection sys...
Article
Full-text available
Exciting work is being done in quantum information theory and the detection of low light levels.
Conference Paper
Using single atom detection offered by metastable helium atoms (He*), we are able to measure correlations between atoms. With this we have demonstrated second-order coherence of matter waves that emerge from amplified four-wave mixing (FWM). Our results provide the first second-order, or quantum test of coherence for amplified matter waves. Using t...
Article
Full-text available
One of the seminal advances in quantum optics was the understanding that a quantised description of ensembles of photons is best characterised by correlation functions. Correlations are also a fundamental property of matter waves, and the single wavefunction that describes a Bose-Einstein condensate (BEC) is in principle characterised by long range...
Article
Speckle patterns produced by multiple independent light sources are a manifestation of the coherence of the light field. Second-order correlations exhibited in phenomena such as photon bunching, termed the Hanbury Brown-Twiss effect, are a measure of quantum coherence. Here we observe for the first time atomic speckle produced by atoms transmitted...
Article
In direct analogy to the textbook example of light guided in a few-mode fiber (FMF), we report the observation of the first excited mode of an optically guided atomic beam. We selectively excite the atomic analog of the LP₀₁ optical mode by controlling the energy distribution of ultracold atoms loaded into the guide, resulting in a modal structure...
Article
A major advance in understanding the behavior of light was to describe the coherence of a light source by using correlation functions that define the spatio-temporal relationship between pairs and larger groups of photons. Correlations are also a fundamental property of matter. We performed simultaneous measurement of the second- and third-order co...
Article
Here we utilize the single-atom detection capability of metastable helium to measure the second-order and third-order correlation functions for ensembles of ultracold atoms. We then extend these measurements to characterize the quantum statistics of atoms guided in a dipole potential. By appropriately loading atoms into the guide we are able to pop...
Article
Full-text available
We have used the Hanbury Brown-Twiss effect to directly compare the density correlations of a pulsed atom laser and a pulsed ultracold thermal source of metastable helium. It was found that the isotropic RF outcoupling of atoms from a Bose-Einstein condensate does not result in decoherence, while the 'bunching' typical of incoherent sources was obs...
Article
Full-text available
We measure the second order correlation function for metastable helium atoms released from an ultracold trap source and observe bunching between thermal atoms. When correlations between Bose-Einstein condensed atoms are measured no bunching is observed.

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Projects

Projects (3)
Project
Development and operation of polarised neutron capabilities for a variety of neutron scattering instruments at ANSTO.
Archived project
Exploring the quantum mechanical behaviour of matter waves with Bose Einstein condensates of metastable helium by reversing the roles that matter and light typically play in quantum optics experiments.
Project
To provide conditions for for testing materials provided by visiting researchers to the Australian Centre for Neutron Scattering