The Optical Quantum Computing Theory Program, led by Dr Austin Lund from the University of Queensland, expands understanding in the power of quantum computation from the perspective of quantum optics theory.

Intermediate, or non-universal quantum computing models have been shown to have the potential to exhibit a quantum advantage over classical computers with less quantum resources than universal models.

Particularly in optics, an intermediate model called Boson Sampling, which consists of single photon sources, linear optics and photon counting, has been shown to admit a proof of quantum computational advantage.

CQC²T has, and is, developing and studying alternative intermediate quantum computing models with the potential to bring forward experiments operating in a faster than classical regime.


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Homodyne measurement with a Schrodinger cat state as a local oscillator J Combes, AP Lund Physical Review A, 106, 063706 (2022)
Multimode metrology via scattershot sampling JJ Guanzon, AP Lund, TC Ralph Physical Review A, 104, 032607 (2021)
Maximum entanglement of formation for a two-mode Gaussian state over passive operations S Tserkis, J Thompson, AP Lund, TC Ralph, PK Lam, M Gu, SM Assad Physical Review A, 102, 052418 (2020)
Multipartite Gaussian entanglement of formation S Onoe, S Tserkis, AP Lund, TC Ralph Physical Review A, 102, 042408 (2020)
Controllable quantum interference from two-photon scattershot sources JJ Guanzon, AP Lund, TC Ralph Physical Review A, 102, 032606 (2020)
A robust W-state encoding for linear quantum optics MK Vijayan, AP Lund, PP Rohde Quantum, 4, 303 (2020)