Professor Jonathan Matthews
MSci(Bristol), PhD, MSc(Bristol), MSc(Bristol), PhD(Bristol)
Current positions
Professor of Quantum Photonics
School of Physics
Contact
Press and media
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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).
Projects and supervisions
Research projects
Monolithic generation & detection of squeezed light in Silicon Nitride Photonics (Mono-Squeeze) EP/X016218/1
Principal Investigator
Managing organisational unit
School of PhysicsDates
01/01/2024 to 31/12/2026
Monolithic generation & detection of squeezed light in Silicon Nitride Photonics (Mono-Squeeze) EP/X016218/1
Principal Investigator
Managing organisational unit
School of PhysicsDates
01/01/2024 to 31/12/2026
Monolithic generation & detection of squeezed light in Silicon Nitride Photonics (Mono-Squeeze) EP/X016218/1
Principal Investigator
Managing organisational unit
School of PhysicsDates
01/01/2024 to 31/12/2026
8101 H2020-MSCA-IF-2019 (892242) QIIQI Sabine Wollmann
Principal Investigator
Managing organisational unit
School of PhysicsDates
01/03/2021 to 28/02/2023
8101 Newton International Fellowships 2020 Rubino
Principal Investigator
Managing organisational unit
School of PhysicsDates
01/03/2021 to 28/02/2023
Thesis supervisions
Overcoming Practical Limitations to Realise Photonic Quantum-Enhanced Measurements
Supervisors
Engineering quantum light-matter interactions in solid-state platforms
Supervisors
Quantum random number generators in integrated photonics
Supervisors
Quantum Metrology with Bright Squeezed Light
Supervisors
Suppression of Noise in Classical and Quantum Optics
Supervisors
Balanced detection for silicon-integrated continuous-variables quantum optics
Supervisors
Resources for Integrated Quantum Sensing in the Mid-infrared
Supervisors
High bandwidth homodyne detection for integrated quantum optics
Supervisors
Publications
Recent publications
20/09/2023Heterogeneous Integration of Solid-State Quantum Systems with a Foundry Photonics Platform
ACS Photonics
Semi-device independent nonlocality certification for near-term quantum networks
Semi-device independent nonlocality certification for near-term quantum networks
A CMOS-compatible heterogeneous interferometer for chip-scale temperature sensing
Applied Physics Letters
Advantage of Coherent States in Ring Resonators over Any Quantum Probe Single-Pass Absorption Estimation Strategy
Physical Review Letters
Estimating the concentration of chiral media with bright squeezed light
Applied Physics Letters
Thesis
Multi-photon quantum information science and technology in integrated optics
Supervisors
Award date
01/01/2011