Brennen group

Quantum Many Body Science

Nature is a wondrous place and it’s not a finished product.My main interests are how to use the laws of quantum mechanics to probe in ever more exquisite detail the manifestations of nature — from elementary interactions to the collective behaviour of complex many particle systems. With new engineered quantum systems we can build quantum enhanced sensors like magnetometers and gravimeters, construct fault tolerant quantum computers, and even synthesize vacuum states of quantum field theories.

Further information

Current research topics in my group:

• Quantum Many Body Information
• Quantum Simulation with Wavelets
• Tensor Network Holography
• Quantum Cellular Automata
• Collective spin physics with NV centres

Members:

1. Mr. Nathan McMahon, (enrolled 2014-PhD thesis submitted 04/2018)
2. Ms. Nabomita Roy Mukty (enrolled in MRES 2017)

Alumni:

• Dr. Babetunde Ayeni, primary supervisor, (enrolled 2014-PhD completed 2017), “Studies of braided non-Abelian anyons using anyonic tensor networks”
• Dr. Lauri Lehmann,  primary supervisor (enrolled 2009-PhD completed 2013);  “Statistical effects in anyonic quantum walks”
• Dr. Gerardo Paz Silva, active co-supervisor (enrolled 2008-PhD completed 2011) “On quantum computing with reduced requirements”
• Dr. Tommaso Demarie, active co-supervisor (enrtolled 2011-PhD completed 2014), “Geometrical and Topological Aspects of Quantum Information systems”
• Dr. Mauro Cirio, active co-supervisor (enrolled 2011-PhD completed 2014), “Engineered quantum systems: magnetomechanics, quantum algorithms for statistical systems, and emergent many body phenomena”
• Dr. Andrew Darmawan, active co-supervisor (enrolled 2010-PhD completed at USydney 2014), “Quantum Computational Phases of Matter"
• Mr. Bryte Hagan primary supervisor  (enrolled 2016-MRES completed 2018),  “Quantum simulations of quantum field theory”
• Mr. Dean Southwood, primary supervisor (enrolled 2015-MRES completed 2017), “Resolution-dependent simulation of quantum field theory using wavelets”
• Ms. Rochelle Martin, active co-supervisor (enrolled 2015-MRES completed 2017), “Exploring Cooperative Effects with Nitrogen-Vacancy Centres in Diamond”
• Mr. Trond Linjordet, primary supervisor (enrolled 2011-MRES completed 2013), “Adiabatic transition from cluster state to surface code”

Publications:

R. J. Harris, N.A. McMahon, G.K. Brennen, and T. M. Stace, “Calderbank-Steane-Shor Holographic Quantum Error Correcting Codes,” arXiv:1806.06472

S. Singh, N.A. McMahon, and G.K. Brennen, “Holographic spin networks from tensor network states,” Physical Review D 97, 0266013 (2018).

S. Bartlett, G.K. Brennen, and A. Miyake, "Robust symmetry-protected metrology with the Haldane phase,” Quantum Science and Technology 3, 014010 (2017).

C. Bradac, M. Johnsson, M. van Breugel, B. Baragiola, R. Martin, M.L. Juan, G.K. Brennen, and T. Volz, "Observation of room-temperature spontaneous superradiance from single diamond nanocrystals," Nature Communications 8, 1205 (2017).

G.K. Brennen, G. Pupillo, E. Rico, T.M. Stace, and D. Vodola, "Loops and strings in a superconducting lattice gauge simulator," Physical Review Letters 117, 240504 (2016).