
Overview
Background
Dr Jacqui Romero is an expert in experimental quantum information. Her research is focused on using higher-dimensional systems for exploring curious quantum physics phenomena and developing future quantum technologies. She is the group leader of the research team Qudits@UQ, there's more information on her group's webpage.
Jacqui was born and bred in Manila, Philippines. Hearing her high school physics teacher complain about quantum physics, she became curious and googled "quantum physics"—she has been hooked ever since. She holds BS Applied Physics magna cum laude and MS Physics degrees from the University of the Philippines. She finished her PhD at the University of Glasgow (in sunny Scotland!) where she was a researcher for seven years. In 2015, she moved to Brisbane to join the Quantum Technology group at the University of Queensland. In 2016 she took up an ARC DECRA fellowship with the same group. In 2019, she took up a Westpac Research Fellowship and formed her own team, Qudits@UQ. Jacqui is recognised for moving the shape of photons to mainstream quantum information. She has received several prestigious national and international awards which include: a L'Oreal-UNESCO For Women In Science award in 2017 (one of four in Australia), the Ruby Payne-Scott Medal of the Australian Institute of Physics for excellence in early-career research in 2018, and a L'Oreal-UNESCO For Women In Science International Rising Talent Award in 2019 (one of fifteen awards globally).
She is currently an associate professor and Westpac Research Fellow. She is also a chief investigator at the Centre of Excellence For Engineered Quantum Systems (EQUS).
Outside work, she is a busy mum to three lovely boys, and an occasional painter. She also loves sharing her research to the wider community, example here.
Availability
- Associate Professor Jacqui Romero is:
- Available for supervision
- Media expert
Fields of research
Qualifications
- Bachelor of Applied Physics, University of the Philippines Diliman
- Masters (Coursework) of Physics, University of the Philippines Diliman
- Doctor of Philosophy, University of Glasgow
Research interests
-
Generating high-dimensional quantum states
Quantum information and quantum technologies are largely based on qubits—two-dimensional quantum systems that is the quantum counterpart of the classical bit. Given that quantum systems are naturally high-dimensional, the restriction to qubits is not necessary. Nature provides us with qudits—d-level quantum systems—which we could use to represent quantum information. Using qudits comes with immediate benefits like higher information capacity, and robustness to noise. Entanglement—the quintessential quantum phenomenon that allows stronger-than-classical correlations—is far richer offers more advantages in higher dimensions. We are interested in experimentally generating high-dimensional quantum states (entangled or otherwise!) for quantum communication and quantum computation by controlling the various properties of the photon.
-
High-dimensional quantum information processing
Manipulating photonic high-dimensional quantum information becomes challenging both in scale and control as the qudit dimension increases. We are interested in designing devices (whether in free space or on-chip) that are both efficient and high-fidelity via inverse design. Here, the desired outputs and inputs are specified and the device is found either by computational search and optimisation, or by using good old optics
-
Tools for characterising high-dimensional quantum information
As the space for quantum information increases, so does the difficulty of characterising of quantum states and quantum processes. For example, the parameter space for qudits grows as ~d^(2n), where d is the qudit dimension and n is the number of particles. We are interested in methods that scale more favourably with dimension, either by requiring fewer measurements or by being more computationally efficient.
-
Higher-order maps
Higher-order maps act on quantum processes, rather than quantum states. Higher-order maps open more possibilities, one example is indefinite causal order, wherein the order of events are not definite (think of chicken and egg---both could come first!). We are interested in demonstrating new capabilities and advantages afforded by these higher-order maps for improving quantum communication and quantum computation.
-
Quantum error correction and noise mitigation
Quantum information often needs to be protected from noise in order to be useful. One approach is to encode quantum information in a higher-dimensional quantum system, as in quantum error correction. Correcting for any arbitrary error is extremely challenging. One way to make quantum error correction more manageable is to understand the noise affecting the quantum system and tailor highly optimised protocols based on these noise characteristics. We are interested in using high-dimensional quantum systems to test quantum error correction and noise mitigation protocols.
Works
Search Professor Jacqui Romero’s works on UQ eSpace
2016
Journal Article
Coherent absorption of N00N states
Roger, Thomas, Restuccia, Sara, Lyons, Ashley, Giovannini, Daniel, Romero, Jacquiline, Jeffers, John, Padgett, Miles and Faccio, Daniele (2016). Coherent absorption of N00N states. Physical Review Letters, 117 (2) 023601, 57-62. doi: 10.1103/PhysRevLett.117.023601
2016
Journal Article
A new device-independent dimension witness and its experimental implementation
Cai, Yu, Bancal, Jean-Daniel, Romero, Jacquiline and Scarani, Valerio (2016). A new device-independent dimension witness and its experimental implementation. Journal of Physics A: Mathematical and Theoretical, 49 (30) 305301, 305301. doi: 10.1088/1751-8113/49/30/305301
2016
Conference Publication
Coherent absorption of N00N states
Roger, Thomas, Restuccia, Sara, Lyons, Ashley, Giovannini, Daniel, Romero, Jacquiline, Jeffers, John, Padgett, Miles and Faccio, Daniele (2016). Coherent absorption of N00N states. 2016 Conference on Lasers and Electro-Optics (CLEO), San Jose, CA USA, 5-10 June 2016. Piscataway, NJ USA: Institute of Electrical and Electronics Engineers. doi: 10.1364/CLEO_QELS.2016.FM1D.6
2015
Journal Article
Spatially structured photons that travel in free space slower than the speed of light
Giovannini, Daniel, Romero, Jacquiline, Potocek, Vaclav, Ferenczi, Gergely, Speirits, Fiona, Barnett, Stephen M., Faccio, Daniele and Padgett, Miles J. (2015). Spatially structured photons that travel in free space slower than the speed of light. Science, 347 (6224), 857-860. doi: 10.1126/science.aaa3035
2014
Journal Article
Practical bound for dimensionality in high-dimensional entanglement
Romero, Jacquiline and Padgett, Miles (2014). Practical bound for dimensionality in high-dimensional entanglement. Proceedings of the National Academy of Sciences of the United States of America, 111 (17), 6122-6123. doi: 10.1073/pnas.1404903111
2014
Journal Article
Quantum digital spiral imaging
Chen, Lixiang, Lei, Jijin and Romero, Jacquiline (2014). Quantum digital spiral imaging. Light: Science and Applications, 3 (3) 201434, e153-e153. doi: 10.1038/lsa.2014.34
2014
Journal Article
Interference of probability amplitudes: a simple demonstration within the Hong-Ou-Mandel experiment
Giovannini, D., Romero, J. and Padgett, M. J. (2014). Interference of probability amplitudes: a simple demonstration within the Hong-Ou-Mandel experiment. Journal of Optics, 16 (3), 032002. doi: 10.1088/2040-8978/16/3/032002
2013
Journal Article
Two-photon optics of Bessel-Gaussian modes
McLaren, Melanie, Romero, Jacquiline, Padgett, Miles J., Roux, Filippus S. and Forbes, Andrew (2013). Two-photon optics of Bessel-Gaussian modes. Physical Review A, 88 (3). doi: 10.1103/PhysRevA.88.033818
2013
Journal Article
Tailored two-photon correlation and fair-sampling: a cautionary tale
Romero, J., Giovannini, D., Tasca, D. S., Barnett, S. M. and Padgett, M. J. (2013). Tailored two-photon correlation and fair-sampling: a cautionary tale. New Journal of Physics, 15 (8) 083047, 083047. doi: 10.1088/1367-2630/15/8/083047
2013
Journal Article
Characterization of high-dimensional entangled systems via mutually unbiased measurements
Giovannini, D., Romero, J., Leach, J., Dudley, A., Forbes, A. and Padgett, M. J. (2013). Characterization of high-dimensional entangled systems via mutually unbiased measurements. Physical Review Letters, 110 (14) 143601. doi: 10.1103/PhysRevLett.110.143601
2012
Journal Article
Hardy's nonlocality proof using twisted photons
Chen, Lixiang and Romero, Jacquiline (2012). Hardy's nonlocality proof using twisted photons. Optics Express, 20 (19), 21687-21692. doi: 10.1364/OE.20.021687
2012
Journal Article
Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam
Romero, J., Giovannini, D., McLaren, M. G., Galvez, E. J., Forbes, A. and Padgett, M. J. (2012). Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam. Journal of Optics, 14 (8), 085401. doi: 10.1088/2040-8978/14/8/085401
2012
Journal Article
Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement
Romero, J., Giovannini, D., Franke-Arnold, S., Barnett, S. M. and Padgett, M. J. (2012). Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement. Physical Review A, 86 (1). doi: 10.1103/PhysRevA.86.012334
2012
Journal Article
Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems
Miatto, F. M., Giovannini, D., Romero, J., Franke-Arnold, S., Barnett, S. M. and Padgett, M. J. (2012). Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems. European Physical Journal D, 66 (7) 178. doi: 10.1140/epjd/e2012-20736-x
2012
Journal Article
Determining the dimensionality of bipartite orbital-angular-momentum entanglement using multi-sector phase masks
Giovannini, D., Miatto, F. M., Romero, J., Barnett, S. M., Woerdman, J. P. and Padgett, M. J. (2012). Determining the dimensionality of bipartite orbital-angular-momentum entanglement using multi-sector phase masks. New Journal of Physics, 14 (7), 073046. doi: 10.1088/1367-2630/14/7/073046
2011
Journal Article
Entangled optical vortex links
Romero, J., Leach, J., Jack, B., Dennis, M. R., Franke-Arnold, S., Barnett, S. M. and Padgett, M. J. (2011). Entangled optical vortex links. Physical Review Letters, 106 (10) 100407. doi: 10.1103/PhysRevLett.106.100407
2010
Journal Article
Violation of Leggett inequalities in orbital angular momentum subspaces
Romero, J., Leach, J., Jack, B., Barnett, S. M., Padgett, M. J. and Franke-Arnold, S. (2010). Violation of Leggett inequalities in orbital angular momentum subspaces. New Journal of Physics, 12 (12), 123007. doi: 10.1088/1367-2630/12/12/123007
2010
Journal Article
Quantum correlations in optical angle-orbital angular momentum variables
Leach, Jonathan, Jack, Barry, Romero, Jacqui, Jha, Anand K., Yao, Alison M., Franke-Arnold, Sonja, Ireland, David G., Boyd, Robert W., Barnett, Stephen M. and Padgett, Miles J. (2010). Quantum correlations in optical angle-orbital angular momentum variables. Science, 329 (5992), 662-665. doi: 10.1126/science.1190523
2010
Journal Article
Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces
Jack, B., Yao, A. M., Leach, J., Romero, J., Franke-Arnold, S., Ireland, D. G., Barnett, S. M. and Padgett, M. J. (2010). Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces. Physical Review A: Atomic, Molecular, and Optical Physics, 81 (4), 043844-1-043844-5. doi: 10.1103/PhysRevA.81.043844
2010
Journal Article
Laser confocal microscope with wavelet-profiled point spread function
Romero, Mary Jacquiline, Bautista, Godofredo, Jr., Ricardo Daria, Vincent and Saloma, Caesar (2010). Laser confocal microscope with wavelet-profiled point spread function. Optics Communications, 283 (7), 1217-1221. doi: 10.1016/j.optcom.2009.11.077
Funding
Current funding
Past funding
Supervision
Availability
- Associate Professor Jacqui Romero is:
- Available for supervision
Before you email them, read our advice on how to contact a supervisor.
Supervision history
Current supervision
-
Doctor Philosophy
High-dimensional entanglement sources on-chip
Principal Advisor
Other advisors: Dr Daniel Peace
-
Doctor Philosophy
Demonstration of relativistic Bohmian trajectories of photons
Principal Advisor
Other advisors: Professor Timothy Ralph, Dr Daniel Peace
-
Completed supervision
-
2023
Master Philosophy
Sharing Secrets Using Quantum Physics
Principal Advisor
Other advisors: Professor Andrew White, Dr Markus Rambach
-
2021
Doctor Philosophy
Applications of higher-order quantum maps
Principal Advisor
Other advisors: Professor Andrew White
-
2021
Doctor Philosophy
High-Dimensional Quantum Information
Principal Advisor
Other advisors: Associate Professor Sally Shrapnel, Professor Andrew White
-
2022
Master Philosophy
Encoding and Measuring Information in High-Dimensional Quantum States
Associate Advisor
Other advisors: Dr Markus Rambach, Professor Andrew White
Media
Enquiries
Contact Associate Professor Jacqui Romero directly for media enquiries about:
- entanglement
- laser
- light
- photons
- quantum
- quantum communications
- quantum computing
- quantum imaging
- quantum sensing
Need help?
For help with finding experts, story ideas and media enquiries, contact our Media team: