Publications

Articles

2026

• • • • • • • • • Observing relativistic trajectories of single photons S. Das, D. S. Dahl, D. Peace, M. P. Almeida, A. Roy, M. Rambach, A. G. White, T. C. Ralph, J. Romero arXiv 2026
                • High-dimensional Quantum Photonics Roadmap M. Malik, M. Kues, T. Ikuta, H. Takesue, D. Bajoni, D. J. Moss, R. Morandotti, A. Forbes, S. Walborn, E. Karimi, Y. Ding, S. Paesani, C. Vigliar, B. Brecht, C. Silberhorn, F. Bouchard, M. Karpiński, B. Sussman, J. M. Lukens, Y. Bromberg, R. Fickler, T. Giordani, F. Sciarrino, Y. Zheng, J. Wang, M. Huber, A. Tavakoli, R. Uola, N. Brunner, N. Friis, N. Herrera Valencia, J. Romero, W. McCutcheon arXiv 2026

2025

• • • • • • • • • Advancing Photonic Chip Design With Interpretable Machine Learning L. Pira, A. Antony, N. Prathap, J. A. Roque, D. Peace, and J. Romero Advanced Photonics Research 7, e202500284
                • Near-unity quantum interference of transverse spatial modes in an ultra-compact inverse-designed photonic device J. A. Roque, D. Peace, S. White, E. Polino, S. Das, F. Ghafari, S. Slussarenko, N. Tischler, and J. Romero APL Photonics 11, 026101
                • Self-guided tomography of time-frequency qudits L. Serino, M.Rambach, B. Brecht, J. Romero, and C. Silberhorn Quantum Science and Technology 10, 025024
                • On-chip high-dimensional entangled photon sources T. Kaur, D. Peace, and J. Romero Journal of Optics 27, 023001

2024

• • • • • • • • • Photonic Quantum Computing J. Romero and G. J. Milburn  Oxford Research Encyclopedia, arXiv preprint

2023

1. 1. 1. 1. 1. 1. 1. 1. 38. Universal quantum computation via superposed orders of single-qubit gates K. Simonov, M.Caleffi, J. Illiano, J. Romero, and A. S. Cacciapuoti Physical Review Research 131, 130201
                        37. Randomness-free Test of Non-classicality: a Proof of Concept Z. Ma, M. Rambach, K. Goswami, S.S. Bhattacharya, M. Banik, and J. Romero Physical Review Letters 131, 130201
                        36. Approximate reconstructability of quantum states and noisy quantum secret sharing schemes Y. Ouyang, K. Goswami, J. Romero, B. C. Sanders, M.-H. Hsieh, and M. Tomamichel Physical Review A 108, 012425

2022

1. 1. 1. • • • • 1. 35. Efficient Quantum State Tracking in Noisy Environments M. Rambach, A. Youssry, M. Tomamichel, J. Romero Quantum Science and Technology 4, 012501
                    34. Roadmap on integrated quantum photonics G. Moody, V. J. Sorger, D. J. Blumenthal, P. W. Juodawlkis, W. Loh, C. Sorace-Agaskar, A. E. Jones, K. C. Balram, J. C. F. Matthews, A. Laing, M. Davanco, L. Chang, J. E. Bowers, N. Quack, C. Galland, I. Aharonovich, M. A. Wolff, C. Schuck, N. Sinclair, M. Lončar, T. Komljenovic, D. Weld, S. Mookherjea, S. Buckley, M. Radulaski, S. Reitzenstein, B. Pingault, B. Machielse, D. Mukhopadhyay, A. Akimov, A. Zheltikov, G. S. Agarwal, K. Srinivasan, J. Lu, H. X. Tang, W. Jiang, T. P. McKenna, A. H. Safavi-Naeini, S. Steinhauer, A.W. Elshaari, V. Zwiller, P. S. Davids, N. Martinez, M. Gehl, J. Chiaverini, K.K. Mehta, J. Romero, N. B. Lingaraju, A. M. Weiner, D. Peace, R. Cernansky, M. Lobino, E. Diamanti, L.T. Vidarte and R. M. Camacho JPhys Photonics 4, 012501
                    33. Entanglement Levels Up J. Romero and M. Rambach Optics and Photonics News 33, 31

2021

1. 1. 1. • • • 1. 1. 32. Experimental characterisation of a non-Markovian quantum process K. Goswami, C. Giarmatzi, C. Monterola, S. Shrapnel, J. Romero and F. Costa Physical Review A 104, 022432 (Editors’ suggestion)
                     31. Robust and efficient high-dimensional quantum state tomography M. Rambach, M. Qaryan, M. Kewming, C. Ferrie, A.G. White, and J. Romero Physical Review Letters 126, 100402 (Editors’ suggestion) Finding quvigints in a quantum treasure map

2020

1. 1. 1. • • • 1. 1. 30. Experiments on quantum causality K. Goswami and J. Romero AVS Quantum Science 2, 037101
                     29. Increasing communication capacity via superposition of order K. Goswami, Y. Cao, G.A. Paz-Silva, J. Romero, and A.G. White Physical Review Research 2, 033292
                     28. Hiding ignorance using high dimensions M. Kewming, S. Shrapnel, A.G. White, and J. Romero Physical Review Letters 124, 250401 Quantum physics provides a way to hide ignorance
                     27. Quantum correlations in the Kerr Ising model M. Kewming, S. Shrapnel, and G. Milburn New Journal of Physics 22 053042
                     26. Distribution of high-dimensional orbital angular momentum entanglement at telecom wavelength over 1km of optical fibre H. Cao, S.C. Gao, C. Zhang, J. Wang, D.Y. He, B.H. Liu, Z.W. Zhou, Y.J. Chen, Z.H. Li, S.Y. Yu, J. Romero, Y.F. Huang, C.F. Li, and G.C. Guo Optica 7 (3) 232-237

2018

1. 1. 1. • • • 1. 1. 25. Indefinite causal order in a quantum switch K. Goswami, C. Giarmatzi, M. Kewming, F. Costa, C. Branciard, J. Romero, and A.G. White Physical Review Letters 121, 090503 (Editors’ suggestion) Physics World 2018 Top Breakthroughs in Physics Shortlist Quantum chicken-or-egg experiment blurs the distinction between before and after

2016

1. 1. 1. • • • 1. 1. 24. Roadmap on structured light H. Rubinsztein-Dunlop, A. Forbes, M.V. Berry, M.R. Dennis, D.L. Andrews,M. Mansuripur, C. Denz, C. Alpmann,P. Banzer, T. Bauer, E. Karimi, L. Marucci, M.J. Padgett, M. Ritsch-Marte, N.M. Litchinitser, N.P. Bigelow, C. Rosales-Guzman, A. Belmonte, J.P. Torres, T.W. Neely, M. Baker, R. Gordon, A.B. Stilgoe, J. Romero, A.G. White, R. Fickler, A.E. Willner, G. Xie, B. McMorran, and A.M. Weiner Journal of Optics 19 , 013001
                     23. A new device-independent dimension witness and its experimental implementation Y. Cai, J-D. Bancal, J Romero, and V. Scarani Journal of Physics A: Mathematical and Theoretical 49 (30), 305301
                     22. Coherent absorption of N00N states T. Roger, S. Restuccia, A. Lyons, D. Giovannini, J. Romero , J. Jeffers, M.J. Padgett, and D. Faccio Physical Review Letters 117 , 023601

2015 (prior to UQ)

1. 1. 1. • • • 1. 1. 21. Spatially structured photons that travel in free space slower than the speed of light D. Giovannini*, J. Romero*, V. Potocek, G. Ferenczi, F. Speirits, S.M. Barnett, D. Faccio, and M.J. Padgett *authors contributed equally Science 347 , 857-860

2014

1. 1. 1. • • • 1. 1. 20. Practical bound for dimensionality in high-dimensional entanglement J. Romero and M.J. Padgett Proceedings of the National Academy of Sciences 111 (17), 6122-6123
                     19. Quantum digital spiral imaging L. Chen, J. Lei, and J. Romero Light: Science and Applications 3 (3), e153
                     18. Interference of probability amplitudes: a simple demonstration within the Hong-Ou-Mandel experiment D. Giovannini, J. Romero, and M.J. Padgett Journal of Optics 16 (3), 032002

2013

1. 1. 1. • • • 1. 1. 17. Two-photon optics of Bessel-Gaussian modes M.G. McLaren, J. Romero , M.J. Padgett, F.S. Roux, and A. Forbes Physical Review A 88 (3), 033818
                     16. Tailored two-photon correlation and fair-sampling: a cautionary tale J. Romero , D. Giovannini, D.S. Tasca, S.M. Barnett, and M.J. Padgett New Journal of Physics 15 (8), 083047
                     15. Characterization of high-dimensional entangled systems via mutually unbiased measurements D. Giovannini, J. Romero , J. Leach, A. Dudley, A. Forbes, and M.J. Padgett Physical Review Letters 110 (14), 143601

2012

1. 1. 1. • • • 1. 1. 14. Hardy’s nonlocality proof using twisted photons L.Chen and J. Romero Optics Express 20 (19) 21687-21692
                     13. Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam J. Romero, D. Giovannini, M.G. McLaren, E.J. Galvez, A. Forbes, and M.J. Padgett Journal of Optics 14 (8), 085401
                     12. Increasing the dimension in high-dimensional two-photon orbital angular momentum entanglement J. Romero , D. Giovannini, S. Franke-Arnold, S.M. Barnett, and M.J. Padgett Physical Review A 86 (1), 012334
                     11. Bounds and optimisation of orbital angular momentum bandwidths within parametric down-conversion systems F. M. Miatto, D. Giovannini, J. Romero , S. Franke-Arnold, S.M Barnett, and M.J. Padgett European Physical Journal D 66 , 178
                     10. Determining the dimensionality of bipartite orbital-angular-momentum entanglement using multi-sector phase masks D. Giovannini, F.M. Miatto, J. Romero , S.M. Barnett, J.P. Woerdman, and M.J. Padgett New Journal of Physics 14 , 073046

2011

1. 1. 1. • • • 1. 1. 9. Entangled optical vortex links J. Romero , J. Leach, B. Jack, M.R. Dennis, S. Franke-Arnold, S.M. Barnett, and M.J. Padgett Physical Review Letters 106 , 100407

2010

1. 1. 1. • • • 1. 1. 8. Violation of Leggett inequalities in orbital angular momentum subspaces J. Romero , J. Leach, B. Jack, S.M. Barnett, M.J. Padgett, and S. Franke-Arnold New Journal of Physics 12 , 123007
                     7. Quantum correlations in optical angle orbital angular momentum variables J. Leach, B. Jack, J. Romero , A.K. Jha, A.M. Yao, S. Franke-Arnold, D.G. Ireland, R.W. Boyd, S.M. Barnett, and M.J. Padgett Science 329 , 662-665
                     6. Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces B. Jack, A.M. Yao, J. Leach, J. Romero , S. Franke-Arnold, D.G. Ireland, S.M. Barnett, and M.J. Padgett Physical Review A 81 , 043844
                     5. Laser confocal microscope with wavelet-profiled point spread function M.J. Romero , G. Bautista, V.R. Daria, and C. Saloma Optics Communications 283 (7), 1217-1221

2009

1. 1. 1. • • • 1. 1. 4. Holographic ghost imaging and the violation of a Bell inequality B. Jack, J. Leach, J. Romero , S. Franke-Arnold, M. Ritsch-Marte, S.M. Barnett, and M.J. Padgett Physical Review Letters 103 , 083602
                     3. Violation of a Bell inequality in two-dimensional orbital angular momentum state-spaces J. Leach, B. Jack, J. Romero , M. Ritsch-Marte, R. W. Boyd, A.K. Jha, S.M. Barnett, S. Franke-Arnold, and M.J. Padgett Optics Express 17 , 8287-8293
                     2. Parallel two-photon photopolymerization of microgear patterns G. Bautista, M.J. Romero , G Tapang, and V.R. Daria Optics Communications 282 (18), 3746-3750

2007

1. 1. 1. • • 1. 1. 1. 1. Modifed filter design to optimize the synthetic reference wave in the generalized phase contrast method M.J. Romero and V.R. Daria Optics Communications 280 (2), 237-242

Book Chapters

1. 1. • • • • • • Orbital angular momentum: Testbed for quantum mechanics J. Romero and M.J. Padgett in Quantum Information and Coherence; E. Andersson and P. Öhberg (Eds.) Springer International Publishing (2014)
                • An experimentalist’s introduction to orbital angular momentum for quantum optics J.Romero, D. Giovannini, S. Franke-Arnold, and M.J. Padgett in The Angular Momentum of Light; D. Andrews and M. Babiker (Eds.) Cambridge University Press (2013)