Dr Jonathan C F Matthews

MSci(Bristol), PhD, MSc(Bristol), MSc(Bristol), PhD(Bristol)

  • BS8 1TL

20072020

Research output per year

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Personal profile

Research interests

Quantum metrology. From photography to the ultra-precise iterferometers used to detect gravitational waves, light has proven to be a fansatstic way to quantify our surroundings. Quantum mechanics defines the limit in quality of optical measurements. For example, the precision that laser interferometers can measure subtle changes in distance is limited by shot noise. By careful engineering of quantum properties of light — e.g. single photons, entanglement and squeezing — we know that we can surpase previously understood "limits" in precision measurement. Such quantum-enhanced techniques in optical measurement have the potential to impact whenever precision measurement with light is deployed, from healthcare to precision manufacture. And underpinning such proposals is some really interesting physics and fantastic challenges in optics and photonics engineering. Recently, we explored using single photons to perform sub shot noise absorption spectroscopy, applied to descriminate Haemoglobin samples: New J. Phys. 19 023013 (2017).

Quantum Walks. The random walk has proven to be a useful model for computational physics. Perhaps most famously exemplified by the "druken sailor" or Galton's board, the general random walk describes stochastic motion of particles around a descretised space, giving rise to descriptions of e.g. Brownian motion and population genetics. The quantum mechanical analogue of this idea is the "quantum walk" — here the particles still move around a discretised space, but can move in superposition giving rise to vastly different dynamics to its classical counterpart due to wave-like intereference. Many different types of quantum walk have been devised and can be found in the literature. Their applications include use as a model for coherent transport in other quantum systems, as an approach to forms of quantum computation and as an aid to proving approaches to universal quatnaum computation (when e.g. nonlinearities are included). My work in this area has focused on optical implementations of quantum walks, including most recently simulation with a primitive optical quantum processor: Nature Communications 7, Article number: 11511 (2016).

Structured keywords and research groupings

  • Bristol Quantum Information Institute
  • QETLabs

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Projects

Research Output

Approaching the quantum limit of precision in absorbance estimation using classical resources

Allen, E., Sabines Chesterking, J. J., Mcmillan, A. R., Joshi, S. K., Turner, P. S. & Matthews, J. C. F., 12 Aug 2020, In : Physical Review Research.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
10 Downloads (Pure)

A practical model of twin-beam experiments for sub-shot-noise absorption measurements

Mueller, J. D., Samantaray, N. & Matthews, J. C. F., 21 Jul 2020, In : Applied Physics Letters. 117, 6 p., 034001.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
  • 11 Downloads (Pure)

    Quantum Optical Metrology of Correlated Phase and Loss

    Birchall, P. M., Allen, E. J., Stace, T. M., O'Brien, J. L., Matthews, J. C. F. & Cable, H., 8 Apr 2020, In : Physical Review Letters. 124, 140501, p. 140501 11 p.

    Research output: Contribution to journalArticle (Academic Journal)

    Open Access
    File
  • 62 Downloads (Pure)

    Datasets

    Optical implementation of spin squeezing

    Sabines-Chesterking, J. (Creator), Matthews, J. C. F. (Creator), Matthews, J. C. F. (Creator), Cable, H. (Creator), O’Brien, J. L. (Creator) & Ono, T. (Creator), University of Bristol, 28 Apr 2017

    Dataset

    Twin-beam sub-shot-noise raster-scanning microscope

    Matthews, J. C. F. (Creator), Mcmillan, A. R. (Creator), Sabines Chesterking, J. J. (Creator), Joshi, S. K. (Contributor), Moreau, P. (Contributor), Knauer, S. (Contributor), Johnston, E. (Contributor) & Rarity, J. G. (Contributor), University of Bristol, 14 Oct 2019

    Dataset

    Generation of random numbers by measuring on a silicon-on-insulator chip phase fluctuations from a laser diode

    Raffaelli, F. (Creator), Sibson, P. (Creator), Kennard, J. E. (Creator), Mahler, D. H. (Creator), Thompson, M. G. (Creator), Matthews, J. C. F. (Creator) & Matthews, J. C. F. (Data Manager), University of Bristol, 13 Jun 2018

    Dataset

    Activities

    • 1 Participation in conference
    • 1 Fellowship awarded competitively
    • 1 Other
    • 1 Visiting an external academic institution

    Quantum UK 2015: The Science and Innovation Conference of the UK Quantum Technology Hubs

    Jonathan C F Matthews (Participant)

    21 Sep 201522 Sep 2015

    Activity: Participating in or organising an event typesParticipation in conference

    Harvard University

    Jonathan C F Matthews (Visiting researcher)

    19 Mar 201327 Mar 2013

    Activity: Visiting an external institution typesVisiting an external academic institution

    BGER - Controlled Noise in Quantum Photonics

    Jonathan C F Matthews (Contributor)

    21 Jan 20137 Mar 2013

    Activity: Other activity typesOther

    Supervised Work

    Multi-photon quantum information science and technology in integrated optics

    Author: Matthews, J. C. F., 2011

    Supervisor: O'Brien, J. (Supervisor) & Thompson, M. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy (PhD)

    File