STAFF LISTING

LLOYD C.L. HOLLENBERG
PhD University of Melbourne (1985-89)

Associate Professor & Reader of Phyics
University of Melbourne
Program Manager Device Modelling
Centre for Quantum Computer Technology
JSPS Fellow (1990-91)

Research Interests

My early work in non-perturbative many body systems[1] and lattice gauge theory[2] - which produced a new and surprising connection between the Lanczos tridiagonal form of a Hamiltonian and lowest states of the extensive system[3] - was a natural starting point to develop my interest in quantum computing (QC). My present work focuses mainly on theoretical aspects of the implementation of quantum computing in the solid-state. Given the complexities of donor systems in semi-conductors, detailed theoretical modelling of the quantum systems proposed as QC architectures is required by experimentalists not only to fabricate and develop existing schemes, but also to develop novel architectures for solid-state quantum computing. To this end, in the Device Modelling Program we work on a large number of problems spanning solid-state buried dopant quantum computing.

At present my work focuses on the physics and modelling of the Kane quantum computer[4-6] (gate operations, the donor electron wave function, decoherence and spin readout), complimentary buried dopant architectures[7] (buried dopant charge qubit, decoherence due to charge traps), and quantum algorithms[8,9] (implementations on linear arrays, effect of imperfect gates, quantum error correction).

Select papers

1. L.C.L. Hollenberg, "Plaquette Expansion in Lattice Hamiltonians", Physical Review D47, 1640 (1993).
   

2. L.C.L. Hollenberg, "First Order Analytic Diagonalization of Lattice QCD", Physical Review D50, 6917 (1994).
   

3. L.C.L. Hollenberg and N.S. Witte, "Analytic Solution for the Ground State Energy of the Extensive Many-Body Problem", Physical Review B54, 16309 (1996).
   

4. C.J. Wellard, L.C.L. Hollenberg, and H.C. Pauli, "Non-Adiabatic CNOT Gate for the Kane Quantum Computer" Physical Review A65, 032303 (2002).
   

5. C.J Wellard and L.C.L. Hollenberg,"Thermal noise in a solid state quantum computer" Journal of Physics D: Applied Physics 35, 2499 (2002).
   

6. A.G. Fowler, C.J. Wellard, and L.C.L. Hollenberg, "Error rate of the Kane quantum computer controlled-NOT gate in the presence of dephasing" Physical Review A 67,012301 (2003).
   

7. L.C.L. Hollenberg, A.S. Dzurak, C.J. Wellard, A.R. Hamilton, D.J. Reilly, G.J. Milburn, R.G. Clark,"Charge-based quantum computing using single donors in semiconductors", cond-mat/0306235
   

8. L.C.L. Hollenberg, "Fast Quantum Search Algorithms in Protein Sequence Comparison - Quantum Bioinformatics",Physical Review E62, 7532 (2000).
   

9. A.G. Fowler and L.C.L. Hollenberg,"Robustness of Shor's algorithm with finite rotation control", quant-ph/0306018.
   

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