143 citations · 537 across the 17 of their papers we have counts for
17 papers
Routes Towards Optical Quantum Technology --- New Architectures and Applications
Keith R. Motes
This thesis is based upon the work I have done during my PhD candidature at Macquarie University. In this work we develop quantum technologies that are directed towards realising a…
Encoding qubits into oscillators with atomic ensembles and squeezed light
Keith R. Motes, Ben Q. Baragiola, Alexei Gilchrist +1
The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator provides a number of advantages when used in a fault-tolerant architecture for quantum computing, most…
Linear optical quantum metrology with single photons --- Experimental errors, resource counting, and quantum Cramér-Rao bounds
Jonathan P. Olson, Keith R. Motes, Patrick M. Birchall +5
Quantum number-path entanglement is a resource for super-sensitive quantum metrology and in particular provides for sub-shotnoise or even Heisenberg-limited sensitivity. However, s…
Adaptive phase estimation with two-mode squeezed-vacuum and parity measurement
Zixin Huang, Keith R. Motes, Petr M. Anisimov +2
A proposed phase-estimation protocol based on measuring the parity of a two-mode squeezed-vacuum state at the output of a Mach-Zehnder interferometer shows that the Cramér-Rao sens…
A Quantum Optics Argument for the #P-hardness of a Class of Multidimensional Integrals
Peter P. Rohde, Dominic W. Berry, Keith R. Motes +1
Matrix permanents arise naturally in the context of linear optical networks fed with nonclassical states of light. In this letter we tie the computational complexity of a class of…
Efficient recycling strategies for preparing large Fock states from single-photon sources --- Applications to quantum metrology
Keith R. Motes, Ryan L. Mann, Jonathan P. Olson +6
Fock states are a fundamental resource for many quantum technologies such as quantum metrology. While much progress has been made in single-photon source technologies, preparing Fo…
Implementing Scalable Boson Sampling with Time-Bin Encoding: Analysis of Loss, Mode Mismatch, and Time Jitter
Keith R. Motes, Jonathan P. Dowling, Alexei Gilchrist +1
It was recently shown by Motes, Gilchrist, Dowling & Rohde [PRL 113, 120501 (2014)] that a time-bin encoded fiber-loop architecture can implement an arbitrary passive linear optics…
Gromov-Hausdorff limit of Kähler manifolds and the finite generation conjecture
Gang Liu
We study the uniformization conjecture of Yau by using the Gromov-Haudorff convergence. As a consequence, we confirm Yau's finite generation conjecture. More precisely, on a comple…
An introduction to boson-sampling
Bryan T. Gard, Keith R. Motes, Jonathan P. Olson +2
Boson-sampling is a simplified model for quantum computing that may hold the key to implementing the first ever post-classical quantum computer. Boson-sampling is a non-universal q…
Sampling arbitrary photon-added or photon-subtracted squeezed states is in the same complexity class as boson sampling
Jonathan P. Olson, Kaushik P. Seshadreesan, Keith R. Motes +2
Boson sampling is a simple model for non-universal linear optics quantum computing using far fewer physical resources than universal schemes. An input state comprising vacuum and s…
Scalable boson-sampling with time-bin encoding using a loop-based architecture
Keith R. Motes, Alexei Gilchrist, Jonathan P. Dowling +1
We present an architecture for arbitrarily scalable boson-sampling using two nested fiber loops. The architecture has fixed experimental complexity, irrespective of the size of the…
Boson sampling with displaced single-photon Fock states versus single-photon-added coherent states---The quantum-classical divide and computational-complexity transitions in linear optics
Kaushik P. Seshadreesan, Jonathan P. Olson, Keith R. Motes +2
Boson sampling is a specific quantum computation, which is likely hard to implement efficiently on a classical computer. The task is to sample the output photon number distribution…
Will boson-sampling ever disprove the Extended Church-Turing thesis?
Peter P. Rohde, Keith R. Motes, Paul A. Knott +1
Boson-sampling is a highly simplified, but non-universal, approach to implementing optical quantum computation. It was shown by Aaronson and Arkhipov that this protocol cannot be e…
Quantum random walks on congested lattices
Keith R. Motes, Alexei Gilchrist, Peter P. Rohde
We consider quantum random walks on congested lattices and contrast them to classical random walks. Congestion is modelled with lattices that contain static defects which reverse t…
Sampling generalized cat states with linear optics is probably hard
Peter P. Rohde, Keith R. Motes, Paul Knott +3
Boson-sampling has been presented as a simplified model for linear optical quantum computing. In the boson-sampling model, Fock states are passed through a linear optics network an…
Spontaneous parametric down-conversion photon sources are scalable in the asymptotic limit for boson-sampling
Keith R. Motes, Jonathan P. Dowling, Peter P. Rohde
Boson-sampling has emerged as a promising avenue towards post-classical optical quantum computation, and numerous elementary demonstrations have recently been performed. Spontaneou…
Phase estimation with two-mode squeezed-vacuum and parity detection restricted to finite resources
Keith R. Motes, Petr M. Anisimov, Jonathan P. Dowling
A recently proposed phase-estimation protocol that is based on measuring the parity of a two-mode squeezed-vacuum state at the output of a Mach-Zehnder interferometer shows that Cr…