J
John Close
Researcher at Australian National University
Publications - 103
Citations - 3250
John Close is an academic researcher from Australian National University. The author has contributed to research in topics: Atom laser & Laser. The author has an hindex of 32, co-authored 101 publications receiving 2839 citations. Previous affiliations of John Close include University of Washington & Max Planck Society.
Papers
More filters
Journal ArticleDOI
The influence of leaf size and shape on leaf thermal dynamics: does theory hold up under natural conditions?
TL;DR: It is agreed that small size, specifically the authors, has adaptive value in hot environments but not with the idea that thermal regulation is the primary evolutionary driver of leaf dissection.
Journal ArticleDOI
Bright solitonic matter-wave interferometer.
Gordon McDonald,Carlos C. N. Kuhn,K. S. Hardman,Shayne Bennetts,P. J. Everitt,P. A. Altin,John Debs,John Close,Nicholas Robins +8 more
TL;DR: The solitonic matter wave is found to significantly increase fringe visibility even compared with a noninteracting cloud and across a range of s-wave scattering values including repulsive, attractive and nonInteracting values.
Journal ArticleDOI
Precision atomic gravimeter based on Bragg diffraction
P. A. Altin,Mattias Johnsson,Vlad Negnevitsky,Graham Dennis,R. P. Anderson,John Debs,Stuart S. Szigeti,K. S. Hardman,Shayne Bennetts,Gordon McDonald,Lincoln D. Turner,John Close,Nicholas Robins +12 more
TL;DR: In this paper, a precision gravimeter based on coherent Bragg diffraction of freely falling cold atoms is presented. But it is not suitable for beamforming and subsequent separation of momentum states for detection due to the inherently multi-state nature of atom diffraction.
Journal ArticleDOI
Cold Metal Clusters: Helium Droplets as a Nanoscale Cryostat.
TL;DR: This method provides a beam of metal clusters up to 2000amu with a precisely known temperature of 0.37K, 2 orders of magnitude lower than previously achieved for free metal clusters, important for high resolution spectroscopic experiments and opens the door to beam studies of superconducting metal clusters.
Journal ArticleDOI
80 ℏ k momentum separation with Bloch oscillations in an optically guided atom interferometer
Gordon McDonald,Carlos C. N. Kuhn,Shayne Bennetts,John Debs,K. S. Hardman,Mattias Johnsson,John Close,Nicholas Robins +7 more
TL;DR: In this article, the authors demonstrate phase sensitivity in a horizontally guided, acceleration-sensitive atom interferometer with a momentum separation of $80\ensuremath{hbar}k$ between its arms.