Publications

Stop motion: using high resolution spatiotemporal data to estimate and locate stationary and movement behaviour in an office workplace

Prolonged periods of stationary behaviour, a common occurrence in many office workplaces, are linked with a range of physical …

Brett Pollard, Gordon McDonald, Fabian Held, Lina Engelen

Health promotion interventions to improve oral health of adolescents: A systematic review and meta-analysis

Objectives

To evaluate the effectiveness of health promotion interventions on oral health knowledge, behaviour and status of healthy …

Carrie Tsai, Sarah Raphael, Caitlin Agnew, Gordon McDonald, Michelle Irving

Predictors of Discharge Against Medical Advice in a Tertiary Paediatric Hospital

Background: Patients who discharge against medical advice (DAMA) from hospital carry a significant risk of readmission and have …

Louise Sealy, Karen Zwi, Gordon McDonald, Aldo Saavedra, Lisa Crawford, Hasantha Gunasekera

Fine-scale behavioural adjustments of prey on a continuum of risk

In the wild, prey species often live in the vicinity of predators, rendering the ability to assess risk on a moment-to-moment basis …
Maud I. A. Kent, James E. Herbert-Read, Gordon McDonald, A. Jamie Wood, Ashley J. W. Ward

Discharge against medical advice in culturally and linguistically diverse Australian children

Objectives This study quantifies the prevalence and rates of discharge against medical advice (DAMA) in culturally and linguistically …
Xin Yue Guo, Susan Woolfenden, Gordon McDonald, Aldo Saavedra, Raghu Lingam

Disparate binding kinetics by an intrinsically disordered domain enables temporal regulation of transcriptional complex formation

Different combinations and permutations of transcription factors work together to regulate the expression of target genes. These …
Neil O. Robertson, Ngaio C. Smith, Athina Manakas, Mahiar Mahjoub, Gordon McDonald, Ann H. Kwan, Jacqueline M. Matthews

Observation of a modulational instability in Bose-Einstein condensates

We observe the breakup dynamics of an elongated cloud of condensed 85Rb atoms placed in an optical waveguide. The number of localized …
P. J. Everitt, M. A. Sooriyabandara, M. Guasoni, P. B. Wigley, C. H. Wei, G. D. McDonald, K. S. Hardman, P. Manju, J. D. Close, C. C. N. Kuhn, S. S. Szigeti, Y. S. Kivshar, N. P. Robins

Erratum: Bright Solitonic Matter-Wave Interferometer [Phys. Rev. Lett. 113, 013002 (2014)]

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G. D. McDonald, C. C. N. Kuhn, K. S. Hardman, S. Bennetts, P. J. Everitt, P. A. Altin, J. E. Debs, J. D. Close, N. P. Robins

Simultaneous Precision Gravimetry and Magnetic Gradiometry with a Bose-Einstein Condensate: A High Precision, Quantum Sensor

A Bose-Einstein condensate is used as an atomic source for a high precision sensor. A 5×106  atom F=1 spinor condensate of 87Rb is …
K. S. Hardman, P. J. Everitt, G. D. McDonald, P. Manju, P. B. Wigley, M. A. Sooriyabandara, C. C. N. Kuhn, J. E. Debs, J. D. Close, N. P. Robins

Fast machine-learning online optimization of ultra-cold-atom experiments

We apply an online optimization process based on machine learning to the production of Bose-Einstein condensates (BEC). BEC is …
P. B. Wigley, P. J. Everitt, A. {van den Hengel}, J. W. Bastian, M. A. Sooriyabandara, G. D. McDonald, K. S. Hardman, C. D. Quinlivan, P. Manju, C. C. N. Kuhn, I. R. Petersen, A. N. Luiten, J. J. Hope, N. P. Robins, M. R. Hush

Cold Atom Interferometry in Optical Potentials

This thesis describes recent advances in ultra-cold atom interferometry. A common theme in the work described here is that the …

Gordon D. McDonald

Role of source coherence in atom interferometry

The role of source cloud spatial coherence in a Mach-Zehnder-type atom interferometer is experimentally investigated. The visibility …
Kyle S. Hardman, Carlos C. N. Kuhn, Gordon D. McDonald, John E. Debs, Shayne Bennetts, John D. Close, Nicholas P. Robins

External cavity diode lasers with 5kHz linewidth and 200nm tuning range at 1.55um and methods for linewidth measurement

Two simple external cavity diode laser designs using fibre pigtailed gain chips are tested and their properties compared with a high …
Shayne Bennetts, Gordon D. McDonald, Kyle S. Hardman, John E. Debs, Carlos C. N. Kuhn, John D. Close, Nicholas P Robins

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Since their development in the late 1980s, cheap, reliable external cavity diode lasers (ECDLs) have replaced complex and expensive …
Kyle S. {AU - Hardman}, Shayne {AU - Bennetts}, John E. {AU - Debs}, Carlos C. N. {AU - Kuhn}, Gordon D. {AU - McDonald}, Nick {AU - Robins}

Bright Solitonic Matter-Wave Interferometer

We present the first realization of a solitonic atom interferometer. A Bose-Einstein condensate of 1×104 atoms of rubidium-85 is loaded …
G. D. McDonald, C. C. N. Kuhn, K. S. Hardman, S. Bennetts, P. J. Everitt, P. A. Altin, J. E. Debs, J. D. Close, N. P. Robins

A faster scaling in acceleration-sensitive atom interferometers

Atom interferometers have been used to measure acceleration with at best a T2 scaling in sensitivity as the interferometer time T is …
G. D. McDonald, C. C. N. Kuhn, S. Bennetts, J. E. Debs, K. S. Hardman, J. D. Close, N. P. Robins

A Bose-condensed, simultaneous dual-species Mach-Zehnder atom interferometer

This paper presents the first realization of a simultaneous 87Rb-85Rb Mach-Zehnder atom interferometer with Bose-condensed atoms. A …
C C N Kuhn, G D McDonald, K S Hardman, S Bennetts, P J Everitt, P A Altin, J E Debs, J D Close, N P Robins

Precision atomic gravimeter based on Bragg diffraction

We present a precision gravimeter based on coherent Bragg diffraction of freely falling cold atoms. Traditionally, atomic gravimeters …
P A Altin, M T Johnsson, V Negnevitsky, G R Dennis, R P Anderson, J E Debs, S S Szigeti, K S Hardman, S Bennetts, G D McDonald, L D Turner, J D Close, N P Robins

Optically guided linear Mach-Zehnder atom interferometer

We demonstrate a horizontal, linearly guided Mach-Zehnder atom interferometer in an optical waveguide. Intended as a proof-of-principle …
G. D. McDonald, H. Keal, P. A. Altin, J. E. Debs, S. Bennetts, C. C. N. Kuhn, K. S. Hardman, M. T. Johnsson, J. D. Close, N. P. Robins

80hk momentum separation with Bloch oscillations in an optically guided atom interferometer

We demonstrate phase sensitivity in a horizontally guided, acceleration-sensitive atom interferometer with a momentum separation of …
G. D. McDonald, C. C. N. Kuhn, S. Bennetts, J. E. Debs, K. S. Hardman, M. Johnsson, J. D. Close, N. P. Robins

11 W narrow linewidth laser source at 780nm for laser cooling and manipulation of Rubidium

We present a narrow linewidth continuous laser source with over 11 W output power at 780 nm, based on single-pass frequency doubling of …
S. S. Sane, S. Bennetts, J. E. Debs, C. C. N. Kuhn, G. D. McDonald, P. A. Altin, J. D. Close, N. P. Robins

Why Momentum Width Matters for Atom Interferometry

In this paper, we theoretically investigate how the momentum width of an atomic source affects the efficiency of Bragg beam splitters …
S.S. Szigeti, J. E. Debs, J. J. Hope, P. A. Altin, T. H. Barter, D. Doring, G. McDonald, N. P. Robins, J. D. Close

Optically trapped atom interferometry using the clock transition of large87Rb Bose{ extendash}Einstein condensates

We present a Ramsey-type atom interferometer operating with an optically trapped sample of 106 Bose-condensed 87Rb atoms. We …
P A Altin, G McDonald, D Doring, J E Debs, T H Barter, J D Close, N P Robins, S A Haine, T M Hanna, R P Anderson

Comparing Thermal and Lasing Atomic Sources for Precision Inertial Measurement

We compare the sensitivity of an interferometric measurement of gravity using a freely-falling, lasing atomic source to that achieved …
J. E. Debs, P. A. Altin, T. H. Barter, D. Doring, G. R. Dennis, G. McDonald, N. P. Robins, J. D. Close, R. P. Anderson

Collapse and three-body loss in a Rb-85 Bose-Einstein condensate

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P. A. Altin, G. R. Dennis, G. D. McDonald, D. Doring, J. E. Debs, J. D. Close, C. M. Savage, N. P. Robins

Cold-atom gravimetry with a Bose-Einstein condensate

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J. E. Debs, P. A. Altin, T. H. Barter, D. Doring, G. R. Dennis, G. McDonald, R. P. Anderson, J. D. Close, N. P. Robins

Quantum-projection-noise-limited interferometry with coherent atoms in a Ramsey-type setup

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D. Doering, G. McDonald, J. E. Debs, C. Figl, P. A. Altin, H.-A. Bachor, N. P. Robins, J. D. Close

Detecting Atomic Shot Noise On Ultra-cold Atom Clouds

Precise measurement of physical quantities underpins much of modern science and tech- nology. Examples include length and time …
Gordon D. McDonald