Daniel Schumayer, Our people, Department of Physics

Professional Practice Fellow

Photo of Dr Daniel Schumayer.

Location: Room 114
Phone numbers: 3563 (Office)
64 3 470 3563 (Office Direct Dial)
Email: daniel.schumayer@otago.ac.nz
Research Group: https://www.otago.ac.nz/dodd-walls/index.html

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Biography

2000 M.Sc.– Budapest University of Technology and Economics
2004 Ph.D.– Budapest University of Technology and Economics

Currently I am interested in developing algorithms and applying inference techniques to industrial problems. Despite this shift towards more applied sciences, I still maintain a branch of research in theoretical physics, e.g. developing Path Integral Monte Carlo methods for various phase transitions.

Currently active research areas:

Models of crystal oscillators: our everyday electronic devices (e.g. mobile, laptops, tablets, GPS, etc) have to keep track of time, measure geographic location or distance travelled. In order to achieve any of these tasks precise clocks are needed. Crystal oscillators provide a solution for achieving this aim. However, there are factors which limit the precision of such oscillators. My aim is to understanding the physics of oscillators, and develop algorithms which may help in actively eliminating some of these limiting factors.

Inference algorithms for continuous measurements: As computational power rapidly increasing, variety of the practically useful statistical algorithms can be directly adapted and utilised for industrial problems. In our group we attempt to implement such algorithms in already existing commercial devices, thereby improving their performance without the need of possibly costly re-design of the hardware.

Precision agriculture and decision support systems: New Zealand's economy hugely rely on the performance of its agriculture sector, therefore any improvement in the analysis of measurements (e.g. weight gain of an animal) or any improvement in predicting the likelihood of events based on measurements may have substantial outcome not only for the individual farmers, but eventually for the country as well. In the electronics group, we engage in developing not only the devices for precise measurements, but also algorithms which do not necessarily demand large-scale post-processing.

Find out more about my research.

Current teaching

PHSI 131 Physical Law and Its Applications
ELEC 353 Analog Electronics
ELEC 358 Electronic Design Techniques
PHSI 422 Upper Atmospheric and Space Physics
ELEC 442 Digital Signal Processing
ELEC 443 Boundary Value Problems of Mathematical Physics
ELEC 445 Inverse Problems and Imaging

Course Coordinator

ELEC 353 Analog electronics
ELEC 358 Electronic Design Techniques
PHSI 422 Upper Atmospheric and Space Physics
ELEC 442 Digital Signal Progessing
ELEC 443 Boundary Value Problems of Mathematical Physics

Publications

Najafabadi, M. S., Schumayer, D., Lee, C.-K., Jaksch, D., & Hutchinson, D. A. W. (2023). Improving quantum annealing by engineering the coupling to the environment. EPJ Quantum Technology, 10, 44. doi: 10.1140/epjqt/s40507-023-00202-0 Journal - Research Article

Lohof, F., Schumayer, D., Hutchinson, D. A. W., & Gies, C. (2023). Signatures of superradiance as a witness to multipartite entanglement. Physical Review Letters, 131(6), 063601. doi: 10.1103/PhysRevLett.131.063601 Journal - Research Article

Rahimi, N. F. B., Schumayer, D., & Hutchinson, D. A. W. (2023). Feynman's vortices in Bose-Einstein condensates. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 38). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract

Rahimi, N. F. B., Schumayer, D., & Hutchinson, D. (2023). Feynman's vortices in ultracold atomtronic system. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 37). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract

Olsen, H., Schumayer, D., & Hutchinson, D. (2023). Anderson localisation and synthetic gauge fields. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 33). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract

2023

Journal - Research Article

Conference Contribution - Published proceedings: Abstract

2022

Conference Contribution - Published proceedings: Abstract

Olsen, H., Schumayer, D., & Hutchinson, D. (2022). Anderson localisation and synthetic gauge fields. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events

Arabahmadi, E., Schumayer, D., & Hutchinson, D. A. W. (2022). Momentum space signatures of Anderson localization in the symplectic ensemble. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events

2021

Journal - Research Article

Najafabadi, M. S., Schumayer, D., & Hutchinson, D. A. W. (2021). Effects of disorder upon transport and Anderson localization in a finite, two-dimensional Bose gas. Physical Review A, 104(6), 063311. doi: 10.1103/PhysRevA.104.063311

Arabahmadi, E., Schumayer, D., Edwards, M., Eller, B., & Hutchinson, D. A. W. (2021). Thermal stability of a quantum rotation sensor. Physical Review A, 104(3), 033323. doi: 10.1103/PhysRevA.104.033323

Arabahmadi, E., Schumayer, D., & Hutchinson, D. A. W. (2021). Universal nomogram for the atomtronic quantum rotation sensor. Physical Review A, 103(4), 043319. doi: 10.1103/PhysRevA.103.043319

Journal - Research Other

Kjærgaard, N., & Schumayer, D. (2021). No cleverness: Just greatness. Journal of the Royal Society of New Zealand, 51(3-4), 409-414. doi: 10.1080/03036758.2021.1982730

Conference Contribution - Published proceedings: Full paper

Scott, T., & Schumayer, D. (2021). Network analysis of misconceptions in FCI data. AIP Conference Proceedings, 2319(1), 110001. doi: 10.1063/5.0037733

2020

Journal - Research Article

Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. Geophysical Research Letters, 47(e2020GL090498). doi: 10.1029/2020GL090498

Grant, C., Griffin, I., McConnell, M., Quiñones‑Mateu, M., Schumayer, D., & Hutchinson, D. (2020). Re-opening after COVID-19 in New Zealand. Journal of Conservation & Museum Studies, 18(1), 4. doi: 10.5334/jcms.202

Soundy, A. W. R., Panckhurst, B. J., Brown, P., Martin, A., Molteno, T. C. A., & Schumayer, D. (2020). Comparison of enhanced noise model performance based on analysis of civilian GPS data. Sensors, 20, 6050. doi: 10.3390/s20216050

Martin, A., Parry, M., Soundy, A. W. R., Panckhurst, B. J., Brown, P., Molteno, T. C. A., & Schumayer, D. (2020). Improving real-time position estimation using correlated noise models. Sensors, 20, 5913. doi: 10.3390/s20205913

White, D. H., Haase, T. A., Brown, D. J., Hoogerland, M. D., Najafabadi, M. S., Helm, J. L., … Schumayer, D., & Hutchinson, D. A. W. (2020). Observation of two-dimensional Anderson localisation of ultracold atoms. Nature Communications, 11, 4942. doi: 10.1038/s41467-020-18652-w

Kungl, A. F., Schumayer, D., Frazer, E. K., Langhorne, P. J., & Leonard, G. H. (2020). An oblate spheroidal model for multi-frequency acoustic back-scattering of frazil ice. Cold Regions Science & Technology, 177, 103122. doi: 10.1016/j.coldregions.2020.103122

Working Paper; Discussion Paper; Technical Report

Frazer, E. K., Langhorne, P. J., Leonard, G. H., Robinson, N. J., & Schumayer, D. (2020). Observations of the size distribution of frazil ice in an Ice Shelf Water plume. ESSOAr. doi: 10.1002/essoar.10504097.1

2019

Journal - Research Article

Lee, C. K., Najafabadi, M. S., Schumayer, D., Kwek, L. C., & Hutchinson, D. A. W. (2019). Environment mediated multipartite and multidimensional entanglement. Scientific Reports, 9(1), 9147. doi: 10.1038/s41598-019-45496-2

Conference Contribution - Published proceedings: Full paper

Scott, T. F., & Schumayer, D. (2019). Conceptual coherence in Force Concept Inventory data. Journal of Physics: Conference Series, 1286, 012063. doi: 10.1088/1742-6596/1286/1/012063

Conference Contribution - Published proceedings: Abstract

Najafabadi, M. S., Schumayer, D., & Hutchinson, D. A. W. (2019). Environment mediated multipartite and multidimensional entanglement. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 24). Retrieved from https://www.otago.ac.nz/dodd-walls

Working Paper; Discussion Paper; Technical Report

Lee, C. K., Najafabadi, M. S., Schumayer, D., Kwek, L. C., & Hutchinson, D. A. W. (2019). Environment mediated multipartite and multidimensional entanglement. arXiv. Retrieved from https://arxiv.org/abs/1902.08320

Schumayer, D., & Hutchinson, D. A. W. (2019). Peculiarities in the gravitational field of a filamentary ring. arXiv. Retrieved from https://arxiv.org/abs/1902.03344

2018

Journal - Research Article

Scott, T. F., & Schumayer, D. (2018). Central distractors in force concept inventory data. Physical Review Physics Education Research, 14, 010106. doi: 10.1103/PhysRevPhysEducRes.14.010106

2017

Journal - Research Article

Scott, T. F., & Schumayer, D. (2017). Conceptual coherence of non-Newtonian worldviews in Force Concept Inventory data. Physical Review Physics Education Research, 13(1), 010126. doi: 10.1103/PhysRevPhysEducRes.13.010126

Conference Contribution - Published proceedings: Full paper

Martin, A. D., Soundy, A. W. R., Panckhurst, B. J., Brown, C. P., Schumayer, D., Molteno, T. C. A., & Parry, M. (2017). Real-time uncertainty quantification using correlated noise models for GNSS positioning. Proceedings of the IEEE Sensors Conference. IEEE. doi: 10.1109/ICSENS.2017.8233899

Conference Contribution - Verbal presentation and other Conference outputs

Brown, P., Schumayer, D., Molteno, T., & Fox, C. (2017, December). A minimalist microcontroller module for a short EDA course. Verbal presentation at the Electronics New Zealand Conference (ENZCon), Christchurch, New Zealand.

Scott, T. F., & Schumayer, D. (2017, July). Misconceived worldviews in first year University physics students. Verbal presentation at the New Zealand Institute of Physics (NZIP) Conference, Dunedin, New Zealand.

2016

Journal - Research Article

Bennani, V., Aarts, J. M., & Schumayer, D. (2016). Correlation of pressure and displacement during gingival displacement: An in vitro study. Journal of Prosthetic Dentistry, 115(3), 296-300. doi: 10.1016/j.prosdent.2015.08.008

Journal - Research Other

Schumayer, D., & Scott, T. F. (2016). Misconceptions indeed. Physics Education, 51(6), 066503. doi: 10.1088/0031-9120/51/6/066503

Conference Contribution - Published proceedings: Full paper

Soundy, A., Schumayer, D., & Molteno, T. (2016). GPS estimates in the presence of correlated noise. Proceedings of the Electronics New Zealand Conference (ENZCon). (pp. 136-141). University of Waikato, Hamilton, New Zealand: Electronics New Zealand. [Full Paper]

Schumayer, D., & Molteno, T. C. A. (2016). On a representation of feedback shift-registers. Proceedings of the Electronics New Zealand Conference (ENZCon). (pp. 129-135). University of Waikato, Hamilton, New Zealand: Electronics New Zealand. [Full Paper]

Kersey, L., Brown, P., Schumayer, D., & Molteno, T. (2016). Aspects of quartz operation in viscous fluid. Proceedings of the Electronics New Zealand Conference (ENZCon). (pp. 64-69). University of Waikato, Hamilton, New Zealand: Electronics New Zealand. [Full Paper]

2015

Journal - Research Article

Scott, T. F., & Schumayer, D. (2015). Students' proficiency scores within multitrait item response theory. Physical Review Special Topics: Physics Education Research, 11, 020134. doi: 10.1103/PhysRevSTPER.11.020134

Conference Contribution - Published proceedings: Full paper

Schumayer, D., & Molteno, T. C. A. (2015). Heat conduction in multi-layer circuit elements. Proceedings of the IEEE Sensors. IEEE. doi: 10.1109/ICSENS.2015.7370190

Conference Contribution - Published proceedings: Abstract

Kungl, A., Schumayer, D., Langhorne, P., & Leonard, G. (2015). Multichannel acoustic backscattering of frazil ice: A case study in McMurdo Sound, Antarctica. Proceedings of the International Symposium on Contemporary Ice-Sheet Dynamics: Ocean interaction, meltwater and non-linear effects. 73A1930 . Retrieved from http://igs-2015.bas.ac.uk/

Bennani, V., Aarts, J. M., & Schumayer, D. (2015). Correlation of pressure and displacement during gingival retraction: An in vitro study. Journal of Dental Research, 94(Spec Iss B), 2281178. Retrieved from http://www.iadr.org/

2014

Conference Contribution - Published proceedings: Full paper

Schumayer, D., & Molteno, T. (2014). Thermal delay in composite circuit elements. Proceedings of the 21st Electronics New Zealand Conference (ENZCon). (pp. 140). University of Waikato, New Zealand: Electronics New Zealand. [Full Paper]

Soundy, A., Schumayer, D., & Molteno, T. (2014). Nonlinear Kalman filter architecture for integrated GPS and accelerometer based vehicle navigation. Proceedings of the 21st Electronics New Zealand Conference (ENZCon). (pp. 95-100). University of Waikato, New Zealand: Electronics New Zealand. [Full Paper]

Kersey, L., Schumayer, D., & Molteno, T. (2014). Physical model for a wireless piezoelectric fluid sensor. Proceedings of the 21st Electronics New Zealand Conference (ENZCon). (pp. 68-72). University of Waikato, New Zealand: Electronics New Zealand. [Full Paper]

2012

Journal - Research Article

Schumayer, D., Cormack, S., van Zyl, B. P., Farry, J., Collin, A., Zaremba, E., & Hutchinson, D. A. W. (2012). Quantum corrections to the semiclassical Hartree-Fock theory of a harmonically trapped Bose gas. European Physical Journal D, 66(8), 203. doi: 10.1140/epjd/e2012-30225-y

Scott, T. F., Schumayer, D., & Gray, A. R. (2012). Exploratory factor analysis of a Force Concept Inventory data set. Physical Review Special Topics: Physics Education Research, 8(2), 020105. doi: 10.1103/PhysRevSTPER.8.020105

2011

Journal - Research Article

Cormack, S. C., Schumayer, D., & Hutchinson, D. A. W. (2011). Rotons in interacting ultracold Bose gases. Physical Review Letters, 107, 140401. doi: 10.1103/PhysRevLett.107.140401

Ujfalusi, L., Varga, I., & Schumayer, D. (2011). Quantum chaos in one dimension? Physical Review E: Statistical, Nonlinear, & Soft Matter Physics, 84, 016230. doi: 10.1103/PhysRevE.84.016230

Schumayer, D., & Hutchinson, D. A. W. (2011). Colloquium: Physics of the Riemann hypothesis. Reviews of Modern Physics, 83(2), 307-330. doi: 10.1103/RevModPhys.83.307

Conference Contribution - Poster Presentation (not in published proceedings)

Cormack, S. C., Schumayer, D., & Hutchinson, D. A. W. (2011, February). Emergence of a roton minimum in an interacting BEC. Poster session presented at the 5th Annual Dodd-Walls Symposium, Wellington, New Zealand.

Conference Contribution - Verbal presentation and other Conference outputs

Schumayer, D., & Hutchinson, D. A. W. (2011, February). Physics of the Riemann hypothesis. Verbal presentation at the 5th Annual Dodd-Walls Symposium, Wellington, New Zealand.

2010

Journal - Research Article

Schumayer, D., van Zyl, B. P., Bhaduri, R. K., & Hutchinson, D. A. W. (2010). Geometric scaling in the spectrum of an electron captured by a stationary finite dipole. EPL, 89(1), 13001. doi: 10.1209/0295-5075/89/13001

Conference Contribution - Poster Presentation (not in published proceedings)

Hutchinson, D. A. W., Schumayer, D., Cormack, S. C., van Zyl, B. P., & Zaremba, E. (2010, July). Going beyond the local density approximation: The two-dimensional trapped Bose gas. Poster session presented at the 19th International Laser Physics Workshop, Foz do Iguaçu, Brazil.

2008

Journal - Research Article

Schumayer, D., van Zyl, B. P., & Hutchinson, D. A. W. (2008). Quantum mechanical potentials related to the prime numbers and Riemann zeros. Physical Review E: Statistical, Nonlinear, & Soft Matter Physics, 78(5), 056215. doi: 10.1103/PhysRevE.78.056215

Schumayer, D., Melchert, O., Scheid, W., & Apagyi, B. (2008). Effective Rb—Rb inter-atomic potential from ultracold Bose-gas collisions. Journal of Physics B, 41(3), 035302. doi: 10.1088/0953-4075/41/3/035302

2007

Journal - Research Article

Schumayer, D., & Hutchinson, D. A. W. (2007). Thermodynamically activated vortex-dipole formation in a two-dimensional Bose-Einstein condensate. Physical Review A, 75, 015601. doi: 10.1103/PhysRevA.75.015601

Conference Contribution - Published proceedings: Full paper

Apagyi, B., Scheid, W., Melchert, O., & Schumayer, D. (2007). Interatomic-potential inversion from ultracold Bose-gas collision. Nuclear Physics A. 790, (pp. 767c-770c). doi: 10.1016/j.nuclphysa.2007.03.023

2006

Conference Contribution - Poster Presentation (not in published proceedings)

Schumayer, D., & Hutchinson, D. A. W. (2006, December). Path integral Monte Carlo approach to phase transitions in a two-dimensional trapped Bose gas. Poster session presented at the Inaugural Symposium of the Dodd-Walls Centre for Photonics and Ultra Cold Atoms, Auckland, New Zealand.

Schumayer, D., & Hutchinson, D. A. W. (2006, July). Path integral Monte Carlo approach to phase transitions in two-dimensional trapped Bose gas. Poster session presented at the 20th International Conference on Atomic Physics, Innsbruck, Austria.

Conference Contribution - Verbal presentation and other Conference outputs

Apagyi, B., Melchert, O., & Schumayer, D. (2006, August). Potential inversion from collision of ultracold Bose-gas packets. Verbal presentation at the International Union of Pure and Applied Physics: 18th International Conference on Few Body Problems in Physics, Sāo Paulo, Brazil.

2005

Journal - Research Article

Apagyi, B., & Schumayer, D. (2005). Assessment of interspecies scattering lengths a₁₂ from stability of two-component Bose-Einstein condensates. European Physical Journal B, 45(1), 55-61.

Conference Contribution - Poster Presentation (not in published proceedings)

Schumayer, D., & Hutchinson, D. A. W. (2005, December). Thermodynamically activated vortex-dipole formation in a two-dimensional Bose-Einstein condensate. Poster session presented at the Australian Conference on Optics, Lasers and Spectroscopy, Rotorua, New Zealand.

2004

Journal - Research Article

Schumayer, D., & Apagyi, B. (2004). Stability of static solitonic excitations of two-component Bose-Einstein condensates in finite range of interspecies scattering length a₁₂. Physical Review A, 69(4).

Conference Contribution - Poster Presentation (not in published proceedings)

Apagyi, B., & Schumayer, D. (2004, July). Interspecies scattering lenghts and stability of two-component Bose-Einstein condensates. Poster session presented at the 19th International Conference on Atomic Physics, Rio de Janeiro, Brazil.

Awarded Doctoral Degree

Schumayer, D. (2004). Theoretical study of solitonic excitations in Bose-Einstein condensates (PhD). Budapest University of Technology and Economics, Budapest, Hungary. 141p.

2002

Journal - Research Article

Schumayer, D., & Apagyi, B. (2002). Relation between optical and atomic solitons. Physical Review A, 65(5).

Conference Contribution - Poster Presentation (not in published proceedings)

Schumayer, D., & Apagyi, B. (2002, July). On the existence of soliton excitations in multicomponent Bose-Einstein condensation. Poster session presented at the 18th International Conference on Atomic Physics, Cambridge, MA, USA.

2001

Journal - Research Article

Schumayer, D., & Apagyi, B. (2001). Painlevè test of coupled Gross-Pitaevskii equations. Journal of Physics A: Mathematical & General, 34(23), 4969-4981.