Research Associate

Kent Bonsma-Fisher

Quantum physicist Dr. Kent Bonsma-Fisher verifies the optics before he starts his quantum memory experiment using a single-photon source. He is a Post-doctoral Fellow in the Security and Disruptive Technologies Research Centre.
Le physicien quantique Kent Bonsma-Fisher, postdoctorant au Centre de recherche sur les technologies de sécurité et de rupture, vérifie les éléments d’optique avant d’entamer son expérience sur la mémoire quantique avec une source de photons uniques.




Kent Bonsma-Fisher, a postdoctoral fellow currently working with the National Research Council of Canada’s (NRC) Ultrafast Quantum Photonics group, was fortunate to complete his PhD studies while working with the Security and Disruptive Technologies Research Centre. He received his master’s and doctoral degrees in physics at the University of Waterloo Institute for Quantum Computing, where his quantum photonics research earned him the Governor General’s Gold Medal and the Vanier Canada Graduate Scholarship. Kent initially collaborated with the NRC to demonstrate how to store and retrieve photons, and to manipulate their colour using a diamond memory. In his current role as a postdoctoral fellow, Kent’s focus is the generation and manipulation of single photons with a broad range of wavelengths. His work is at the heart of optical quantum technologies, which are revolutionizing computation, sensing and communication.


  1. F. Bouchard, K. Bonsma-Fisher, K. Heshami, P. J. Bustard, D. England, B. Sussman “Measuring ultrafast time-bin qudits,” Phys. Rev. A 107, 022618 (2023).
  2. K. Bonsma-Fisher, P. J. Bustard, C. Parry, T. A. Wright, D. G. England, B. J. Sussman, P. J. Mosley “Ultratunable quantum frequency conversion in photonic crystal fiber,” Phys. Rev. Lett. 129, 203603 (2022).
  3. P. J. Bustard, K. Bonsma-Fisher, C. Hnatovsky, D. Grobnic, S. J. Mihailov, D. England, B. J. Sussman “Toward a Quantum Memory in a Fiber Cavity Controlled by Intracavity Frequency Translation,” Phys. Rev. Lett. 128, 120501 (2022).
  4. J. Sinclair, D. Angulo, K. Thompson, K. Bonsma-Fisher, A. Brodutch, A. M. Steinberg “Measuring the Time Atoms Spend in the Excited State Due to a Photon They Do Not Absorb,” PRX Quantum 3, 010314 (2022).
  5. D. England, F. Bouchard, K. Fenwick, K. Bonsma-Fisher, Y. Zhang, P. J. Bustard, B. J. Sussman “Perspectives on all-optical Kerr switching for quantum optical applications,” Applied Physics Letters 119, 160501 (2021).
  6. Arthur OT Pang, Hugo Ferretti, Noah Lupu-Gladstein, Weng-Kian Tham, Aharon Brodutch, Kent Bonsma-Fisher, JE Sipe, Aephraim M Steinberg “Experimental Comparison of Bohm-like Theories with Different Primary Ontologies,” Quantum 4, 365 (2020).
  7. WK Tham, Hugo Ferretti, Kent Bonsma-Fisher, Aharon Brodutch, Barry C Sanders, Aephraim M Steinberg, Stacey Jeffery “Experimental Demonstration of Quantum Fully Homomorphic Encryption with Application in a Two-Party Secure Protocol,” Physical Review X 10, 011038 (2020).
  8. Josiah Sinclair, Daniela Angulo, Noah Lupu-Gladstein, Kent Bonsma-Fisher, Aephraim M Steinberg “Observation of a large, resonant, cross-Kerr nonlinearity in a cold Rydberg gas,” Physical Review Research 1, 033193 (2019).
  9. K. Fisher, D. G. England, J.-P. W. MacLean, P. J. Bustard, K. Heshami, K. J. Resch, B. J. Sussman “Storage of polarization-entangled THz-bandwidth photons in a diamond quantum memory,” Physical Review A 96, 012324 (2017).
  10. D. G. England, K. Fisher, J.-P. W. MacLean, P. J. Bustard, K. Heshami, K. J. Resch, B. J. Sussman “Phonon-mediated nonclassical interference in diamond,” Physical Review Letters 117, 073603 (2016).
  11. K. Fisher, D. G. England, J.-P. W. MacLean, P. J. Bustard, K. J. Resch, B. J. Sussman “Frequency and bandwidth conversion of single photons in a room-temperature diamond quantum memory,” Nature Communications 7, 1-6 (2016).
  12. Xian Ma, Tyler Jackson, Hui Zhou, Jianxin Chen, Dawei Lu, Michael D Mazurek, Kent AG Fisher, Xinhua Peng, David Kribs, Kevin J Resch, Zhengfeng Ji, Bei Zeng, Raymond Laflamme “Pure-state tomography with the expectation value of Pauli operators,” Physical Review A 93, 032140 (2016).
  13. Evan Meyer-Scott, Daniel McCloskey, Klaudia Gołos, Jeff Z Salvail, Kent AG Fisher, Deny R Hamel, Adán Cabello, Kevin J Resch, Thomas Jennewein “Certifying the presence of a photonic qubit by splitting it in two,” Physical review letters 116, 070501 (2016).
  14. Dylan H Mahler, Lee Rozema, Kent Fisher, Lydia Vermeyden, Kevin J Resch, Howard M Wiseman, Aephraim Steinberg “Experimental nonlocal and surreal Bohmian trajectories,” Science Advances 2, e1501466 (2016).
  15. D. G. England, K. A. G. Fisher, J.-P. W. MacLean, P. J. Bustard, R. Lausten, K. J. Resch, B. J. Sussman “Storage and retrieval of THz-bandwidth single photons using a room-temperature diamond quantum memory,” Physical Review Letters 114, 053602 (2015).
  16. C Erven, E Meyer-Scott, K Fisher, J Lavoie, BL Higgins, Z Yan, CJ Pugh, J-P Bourgoin, R Prevedel, LK Shalm, L Richards, N Gigov, R Laflamme, G Weihs, T Jennewein, KJ Resch “Experimental three-photon quantum nonlocality under strict locality conditions,” Nature Photonics 8, 292 (2014).
  17. KAG Fisher, A Broadbent, LK Shalm, Z Yan, J Lavoie, R Prevedel, T Jennewein, KJ Resch “Quantum computing on encrypted data,” Nature Communications 5, (2014).
  18. Kent AG Fisher, Robert Prevedel, Rainer Kaltenbaek, Kevin J Resch “Optimal linear optical implementation of a single-qubit damping channel,” New Journal of Physics 14, 033016 (2012).
  19. Robert Prevedel, Deny R Hamel, Roger Colbeck, Kent Fisher, Kevin J Resch “Experimental investigation of the uncertainty principle in the presence of quantum memory and its application to witnessing entanglement,” Nature Physics 7, 757 (2011).
  20. JP Carbotte, KAG Fisher, JPF LeBlanc, EJ Nicol “Effect of pseudogap formation on the penetration depth of underdoped high-T_{c} cuprates,” Physical Review B 81, 014522 (2010).