School of Physics

Quantum dynamics and computation research group

Core Membership


Current research students

  • Jeremy Rodriguez (PhD)
  • Thomas Loke (PhD)
  • Josh Izaac (PhD)
  • Anuradha Mahasinghe (PhD)
  • Yuhui Tong (PhD)
  • Michael Swaddle (Master)
  • Gareth Jay (Master) 
  • Daniel George (research assistant)
  • Tania Loke (BPhil Hons)
  • Ben Luo (BPhil Hons)
  • Georgina Carson (BPhil Hons)
  • Anahita Haghighat (BPhil)
  • Dimitrio Sidi (BPhil)
  • Sam Marsh (BPhil) 

Collaborators

  • W/Prof Jim Williams (Physics, UWA)
  • W/Prof Lyle Nokes (Maths, UWA)
  • W/Prof Jie Pan (Mech Eng, UWA)
  • Prof Achim Kempf (Waterloo University, Canada)
  • Prof Jeremy O'Brien (Bristol University, UK)
  • Dr Peter Rohde (Macquarie University)
  • Prof Zhijian Li (Shanxi University)
  • Prof Jim Gates (University of Maryland, US)
  • Prof Yogesh Joglekar (Purdue University Indianapolis, US)
  • Prof Igor Bray (Curtin University)
  • A/Prof John Bamberg (Maths, UWA)
  • Prof Dylan Jayatilaka (Chemistry, UWA)
  • A/Prof Yutaka Shikano (Institute of Molecular Science, Japan)
  • Dr Etsuo Segawa (Tohoku University, Japan)

Instead of brute-force miniaturisation of basic electronic components, quantum computation utilises entirely new design architecture and promises to solve problems that are intractable on conventional computers.  It offers the prospect of harnessing nature at a much deeper level than ever before, as well as a wealth of new possibilities for communication and data processing. 

Core activities

The quantum dynamics and computation group conducts research in the areas of quantum dynamics, quantum information processing, and quantum computation. In addition to using advanced mathematical methods and numerical techniques to model the dynamics of quantum systems and to investigate quantum algorithms, the group also has extensive HPC and computer algebra expertise to solve a wide range of science and engineering problems. 

QCgroup2015 

Achievements in 2015  

Completed Honours Theses:  (1) Tania Loke “Comparing classical and quantum PageRanks”, (2) Georgina Carson "Entanglement dynamics of two-particle quantum Walks”, (3) Ben Luo "Continuous-time quantum walks with time-dependent Hamiltonians"

Completed PhD Theses:  (1) Jeremy P. Rodriguez “Quantum walk via open systems”, (2) Anuradha C. Mahasinghe “A Mathematical Study of Quantum Walk-Based Applications”

Published Journal Papers: (1) J. A. Izaac and J. B. Wang, “pyCTQW: A continuous-time quantum walk simulator on distributed memory computers”, Computer Physics Communications, 186, 81-92 (2015), (2) G. R. Carson, T. Loke, J. B. Wang, “Entanglement dynamics of two-particle quantum walks”, Quantum Information Processing, 14, 3193-3210 (2015), (3) J. P. Rodriguez, Z. J.  Li and J. B. Wang, “Discord and entanglement of two-particle quantum walk on cyclic graphs”, Quantum Information Processing, 14, 119:1-13 (2015), (4) A. Mahasinghe, J. A. Izaac, J. B. Wang, and J. K. Wijerathna, “Phase-modified CTQW unable to distinguish strongly regular graphs efficiently ”, Journal of Physics A, 48, 265301:1-13 (2015), (5) T. Loke and J. B. Wang, "OptQC v1.3: An (updated) optimised parallel quantum compiler”, Computer Physics Communications (2015), (6) Z. J. Li and J B Wang, "An analytical study of quantum walk through glued-tree graphs”, Journal of Physics A, 48, 355301:1-15 (2015), (7) B. L. Douglas, S. James Gates, B. L. Segler, and J. B. Wang, "Automorphism Properties and Classification of Adinkras”, Advances in Mathematical Physics, 2015, 584542:1-18 (2015), (8) Z. J. Li and J. B. Wang, "Single-point position and transition defects in continuous time quantum walks”, Scientific Reports, 5, 13585:1-11 (2015)

Submitted Journal Papers: (1) Qiang, Loke, Montanaro, Aungskunsiri, Zhou, O’Brien, Wang, Matthews, "Efficient Quantum Walk on a Quantum Processor”, submitted to Nature Communications (2015), (2) Loke and Wang, "Efficient quantum circuits for continuous-time quantum walks on composite graphs”, submitted to Quantum Information and Computation (2015), (3) Mahasinghe and Wang, "Efficient quantum circuits for Toeplitz and Hankel matrices”, submitted to Journal of Physics A (2015), (4) Loke, Tang, Rodriguez, Small and Wang, "Comparing classical and quantum PageRanks”, submitted to Quantum Information Processing (2015), (5) Zhou, Loke, Izaac and Wang, "Quantum Fourier Transform in Computational Basis", submitted to Quantum Information and Computation (2015)

Group meetings and seminars 

6 November 2015:

Prof Paul Baird from Université de Brest giving a talk on "An elementary model universe based on combinatorial structure” 

27 October 2015:

Tania Loke presenting her work on “Comparing classical and quantum PageRanks”, Georgina Carson on "Entanglement dynamics of two-particle quantum Walks”, and Ben Luo on "Continuous-time quantum walks with time-dependent Hamiltonians"

23 October 2015:

Lewis Howard giving an informal talk on Hamiltonian decomposition using graph colouring. 

25 September 2015:

Sam Marsh giving an introductory talk on ALGORITHMS. 

18 September 2015:

Prof Michael Small giving an informal talk on network analysis and applications. 

28 August 2015:

Lyle Noakes gave an informal talk on Support Vector Machine Learning and geometry of time series.

21 August 2015:

Tania Loke and Jingwei Tang discussing their results on network analysis based on discrete and continuous time quantum walks. 

14 August 2015:

Thomas Loke and Josh Izaac presenting their research findings about quantum walks on composite graphs. 

12 August 2015:

Jingbo giving an introductory talk on quantum computation and quantum walks at Curtin University.

7 August 2015:

Thomas Loke giving a brief talk on his recent trip to Lindau, meeting with 65 Nobel Laureates.  Sisi Zhou presenting her work on the design of several efficient quantum circuits. 

31 July 2015:

Jingbo giving a talk in School of Mathematics titled "Quantum walk on graphs, unitary operation, Hamiltonian simulation, and efficient quantum circuits". 

21 July 2015:

Yichun Li from Zhejiang university gave an introductory talk on machine learning, including supervised (classification) and unsupervised (clustering, matrix factorization) learning. 

17 July 2015:

Jingbo giving a talk on Physical Implementation of Quantum Walks, in particular with exponentially efficient quantum circuits. 

10 July 2015:

Group discussion on research directions; Xiaowei Duan, Kaixiang Wang, Zexi Niu, Yaguang Li, Wenbin Fu presented their solutions to Schrodinger's equation.

26 June 2015:

Bruce Hartley leading a discussion on Physics vs. Philosophy.

29 May 2015:

Georgina talking about her work on entanglement dynamics of discrete-time quantum walk on degree-regular and degree-irregular graphs.

15 May 2015:

Josh presenting his work done jointly with Anu on phase-modified continous-time qauntum walks on the graph isomorphism problem.

1 May 2015:

Michael Swaddle will give a talk on the Magnus expansion and its application in solving the geodesics for optimal quantum circuits.

24 April 2015:

Group discussion on research directions in 2015 and beyond.

17 April 2015:

Gareth presents his studies on Ito calculus and its application to classical stochastic process, aiming to extend later to quantum stochastic processes.

10 April 2015:

Thomas talks about efficient quantum circuit design, in particular for discrete- and continuous-time quantum walks. 

27 March 2015:

Yuhui giving an informal presentation on "Circulant Matrices and Their Application to Vibration Analysis".  

20 March 2015:

Group discussion on efficient quantum circuits for continuous-time quantum walks.

13 March 2015:

Josh presenting on "Continuous-time quantum walks and percolation".

6 March 2015:

Anu will lead discussions on efficient quantum circuits. 

27 February 2015:

Tania talks about "Walking with Szegedy" and Jeremy on "Quantum walkers interacting with an open environment", followed by informal and casual discussions.

20 February 2015:

Anahita Haghighat giving a presentation on "A Geometric Perspective on Quantum Computation", followed by discussions on classical and quantum probability led by Prof Nozer Singpurwalla.  

Dec 2014 - Feb 2015:

Visiting other universities ... Josh, Michael and Tania (Okinawa Institute of Science and Technology, Japan); Chris, Jacob (USTC, China); Nick, Haydn, Xin-Zheng (Nanjing, China); Julian, Blake (Institute for Molecular Science, Okazaki, Japan); Daniel, Michael (HPC cluster competition, US); Jingbo (USTC, UESTC, SW Jiaotong U, Shanxi U, Hong Kong Polytechnic U)

26 November 2014:

Group discussions on open quantum systems, led by Jeremy Rodriguez.

21 November 2014:

Xiaogang Qiang from the University of Bristol giving a talk on quantum walks and computation using photonic waveguides. 

14 November 2014:

Joint meeting with Acoustics & Vibration group and Geophysics group to discuss inversion; linear and nonlinear response to perturbation; scalar, vectorial and tensorial fields; bandwidth limited signal processing and super oscillations.

10 November 2014:

Prof Kempf giving a tutorial on "Relativistic Quantum Information". 

Jeremy Rodriguez discussing his PhD work on "Quantum Walking via an Open System". 

6 November 2014:

Joint discussion with Gravitational Wave group, led by Achim on "Quantum Zeno effect ‎and possible applications in metrology".  

5 November 2014:

Prof Achim Kempf from the University of Waterloo giving giving a talk entitled "From information theory to spacetime and cosmology".

3 November 2014:

Group discussions on quantum information, decoherence, and quantum noise.

31 October 2014:

Jacob Timmerman talking on "Error Analysis of Quantum Walk Based Algorithms".

30 October 2014:

Michael Swaddle giving a presentation on "Lie groups, geodesics and quantum circuits".

Christopher Murphy presenting on "Entanglement dynamics of interacting quantum walkers".

Daniel George giving a presentation on "Quantum Walking and Protein Folding Kinetics" 

27 October 2014:

Group discussions on "Discrete- and continuous-time quantum walks on directed graphs".

24 October 2014:

Prof. Jeremy O'Brien from the University of Bristol giving a seminar on "The case for photonic quantum computing". 

21 October 2014:

One-day Masterclass given by Prof Achim Kempf on Quantum Noise.    

20 October 2014:

Prof Achim Kempf from the University of Waterloo giving a talk on "How does one explore the deepest laws of nature?"    

17 October 2014:

Dylan Jayatilaka giving an informal talk on "Circulant orbitals for atoms and molecules", which may be tied in with what Thomas did in optimal quantum circuit design.    

2 October 2014:

Daniel giving a presentation on "Protein Folding Dynamics: Classical or Quantum Walks".    

25 Sept 2014:

Jingbo briefly reporting on her recent trip to Cambridge and also leading a discussion on research projects to be offered in 2015. 

19 Sept 2014:

Chris Murphy presenting his work on quantum walk dynamics and possible chaotic behaviour. Michael Swaddle continuing his discussion on quantum circuit design. 

5 Sept 2014:

Michael presenting his work on "quantum circuit design through differential geometry and Lie group theory".  Jacob discussing his work on "physical implementation of quantum walks and error analysis".

22 August 2014:

Ben and Lauchlan presented their work on "Fibonacci discrete-time quantum walk" done during their recent research placement in Japan. Peter Falloon shared his working experience in the financial industry after PhD in physics. 

28 July 2014:

Informal group discussion on S-K theorem, its extension to SU(n), and a new proposal on quantum circuit design. 

25 July 2014:

Thomas discussing a general approach to the construction of quantum circuits to implement continuous-time quantum walks.  

10 July 2014:

Informal group discussion on various honours projects. 

27 June 2014:

Anu giving an informal tutorial on Lie groups and Lie algebra. 

6 June 2014:

Informal group discussion on k-equivalent graphs and GI testing by quantum walks with Brendan Douglas.

2 June 2014:

Informal discussion session on k-equivalent graphs and GI testing by quantum walks with Cheryl, John and Lyle in Maths Rm2.19. 

22 May 2014:

This week, instead of the normal group meeting, we will have an informal discussion session on the Solovay-Kitaev theorem in Lyle's office (maths Rm G.05).  Anu will lead the discussion, explaining what the Solovay-Kitaev theorem is for SU(2) and the proof.     

15 May 2014:

Michael Swaddle presenting his work on quantum computation and Riemannian geometry, which follows Lyle's earlier talks on this topic.

8 May 2014:

Thomas Loke presenting his HPC software package OptQC, an optimised parallel quantum compiler, which maps any given unitary operation into an optimised quantum circuit consisting of a sequential set of elementary quantum gates. He will also discuss a case-by-case design approach to exponentially efficient quantum circuits.

1 May 2014: 

Michael Swaddle on "Numerical Investigation of Geodesics for Optimal Quantum Circuits"; Julian Rodino on "Graph isomorphism testing by single-particle continuous-time quantum walks"; Christopher Murphy on "Entanglement dynamics of interacting quantum walkers"; Jacob Timmerman on "Multiple Operation Integrated Photonic Chip"; Daniel George on "Protein Folding and Quantum Walks"  

25 April 2014:

Prof Jeremy O'Brien from Bristol University giving a seminar on "Photonic Quantum Technologies".

10 April 2014:

Josh Izaac presenting his HPC software package pyCTQW, which provides accurate computation of matrix exponentials, often required to simulate physical, chemical, biological etc processes. 

Prof Klaus Bartschat from Drake University discussing also the computation of matrix exponentials but with time-varying Hamiltonians.

3 April 2014:

Dr Laura Boykin from School of Chemistry and Biochemistry will tell us about her research on HPC Bayesian phylogenetic analyses.

20 Mar 2014:

Jeremy discussing his recent work on quantum walks along directed graphs, which involves the use of density matrix super operators to describe decoherence and dissipation. 

Daniel continuing his presentation on biochemistry, protein folding in particular, and a tentative link between biology and quantum physics.

13 Mar 2014:

W/Prof Lyle Noakes from School of Mathematics and Statistics continuing his tutorial on Differential and Riemannian Geometry. 

6 Mar 2014:

W/Prof Lyle Noakes from School of Mathematics and Statistics presenting an introduction on Riemannian Geometry and its potential application in quantum computation. 

27 Feb 2014:

Daniel George continuing his presentation on biology and biochemistry, as well as a tentative link between biology and quantum physics.  Josh Izaac continuing his talk on complexity theory and photonic Boson sampling.   

13 Feb 2014:

Daniel George giving an overview tutorial on biology and biochemistry. 

6 Feb 2014:

Thomas Loke and Josh Izaac giving a more detailed report on their recent trips to Japan and Israel.