K
K. S. Hardman
Researcher at Australian National University
Publications - 38
Citations - 1357
K. S. Hardman is an academic researcher from Australian National University. The author has contributed to research in topics: Atom interferometer & Interferometry. The author has an hindex of 17, co-authored 36 publications receiving 1129 citations. Previous affiliations of K. S. Hardman include University of Nevada, Reno.
Papers
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Journal ArticleDOI
Fast machine-learning online optimization of ultra-cold-atom experiments.
P. B. Wigley,P. J. Everitt,A. van den Hengel,John Bastian,M. A. Sooriyabandara,Gordon McDonald,K. S. Hardman,C. D. Quinlivan,P. Manju,Carlos C. N. Kuhn,Ian R. Petersen,Andre N. Luiten,Joseph Hope,Nicholas Robins,Michael R. Hush +14 more
TL;DR: In this article, an online optimization process based on machine learning is applied to the production of Bose-Einstein condensates (BEC), which is typically created with an exponential evaporation ramp that is optimal for ergodic dynamics with two-body s-wave interactions and no other loss rates, but likely suboptimal for real experiments.
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
Fast machine-learning online optimization of ultra-cold-atom experiments
P. B. Wigley,P. J. Everitt,A. van den Hengel,John Bastian,M. A. Sooriyabandara,Gordon McDonald,K. S. Hardman,C. D. Quinlivan,P. Manju,Carlos C. N. Kuhn,Ian R. Petersen,Andre N. Luiten,Joseph Hope,Nicholas Robins,Michael R. Hush +14 more
TL;DR: It is demonstrated that the Gaussian process machine learner is able to discover a ramp that produces high quality BECs in 10 times fewer iterations than a previously used online optimization technique.
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
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.