Prof. Gavin Brennen

Room 2.407, 7 Wally’s Walk, Macquarie University
Phone: +61 2 9850 4445
gavin.brennen@mq.edu.au 

  • Quantum computing and quantum simulations
  • Quantum error correction
  • Quantum sensing
  • Quantum optics and atomic physics

I am a Professor of Physics in the School of Mathematical and Physical Sciences and Chief Investigator in the ARC Centre for Excellence in Engineered Quantum Systems (EQUS) I serve on the executive board for the Sydney Quantum Academy (SQA), and on the Standards Australia working group for Quantum Computing. I am also a quantum information advisor to the quantum secure blockchain company BTQ.  I’m interested in designing quantum technologies that use coherence and entanglement in an essential way in order to outperform in terms of speed, precision, and resources what is possible using classical physics.

My research focuses on the theoretical design and development of quantum technologies including quantum computing, quantum simulation, and quantum sensing. Within these areas I work on quantum protocols and algorithms that achieve an advantage over their classical counterparts and develop strategies to make them work in the presence of errors. Applications of my work include: quantum simulations of many body physics for advanced manufacturing, entanglement enhanced E&M field sensors and gravimeters for navigation and resource extraction, distributed entanglement for long baseline interferometry to image stars, and consensus protocols for future networks assisted by quantum computers.

  • Quantum computing and quantum simulations
  • Quantum error correction
  • Quantum sensing
  • Quantum optics and atomic physics
  • 1k flagship program for error corrected qubits within (EQUS)
  • Quantum adversarial strategies for Proof of Work mining (BTQ)
  • Defence acquisition optimisation using quantum algorithms (DIN)
  • Quantum limits on measurements in a universe with a minimum length scale (ARC)

Recent publications:

  1. T. Johnsson, B.Q. Baragiola, T. Volz, G.K. Brennen, “Modified coherence of quantum spins in a damped pure-dephasing model,” Phys. Rev. B 105, 094308 (2022).
  2. Bagherimehrab, Y.R. Sanders, D.W. Berry, G.K. Brennen, and B.C. Sanders, “Nearly optimal quantum algorithm for generating the ground state of a free quantum field theory,” PRX Quantum 3, 020364 (2022).
  3. Mattias T. Johnsson, Nabomita Roy Mukty, Daniel Burgarth, Thomas Volz, G.K. Brennen, “A geometric pathway to scalable quantum sensing,” Phys. Rev. Lett. 125, 190403 (2020).
  4. J. Harris, N.A. McMahon, G.K. Brennen, T.M. Stace “Decoding holographic codes with an integer optimization decoder,” Phys. Rev. A 102, 062417 (2020).
  5. Schütz, J. Schachenmayer, D. Hagenmüller, G.K. Brennen, T. Volz, V. Sandoghdar, T.W. Ebbesen, C. Genes, G. Pupillo, “Ensemble induced strong light-matter coupling of a single quantum emitter,” Phys. Rev. Lett. 124, 113602 (2020)

 

Full publication list available at: https://scholar.google.com/citations?user=_3tVObcAAAAJ&hl=en