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Orestis Georgiou

Hello and welcome to my personal website!

I am a Research Engineer and Program Manager at Ultrahaptics where I lead the Academic Program aimed at facilitating R&D in mid-air haptics and focused Ultrasound. I am also a visiting fellow of the School of Mathematics of the University of Bristol in the United Kingdom. During 2012-16, I was a Senior Research Engineer at Toshiba TRL, and before that I was a research visitor at the MPIPKS in Dresden Germany and an active member of the Dynamical Systems and Social Dynamics group. My BSc is in Mathematical Physics (University of Nottingham 2007), and my PhD in Applied Mathematics (University of Bristol 2011) supervised by Carl Dettmann.

Birthplace: Nicosia, Cyprus, Nationality: Greek Cypriot

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Research Interests

My work lies at the intersection of applied probability, stochastic geometry, and statistical physics, and finds application in wireless telecommunications (e.g. localization and interference mitigation of wireless sensor networks for the IoT), quantum transport (e.g. nano-wires), chaotic dynamical systems (e.g. mathematical billiards), and statistics in general.

I have published over 40 articles in leading international journals and conferences of Mathematics, Physics, Engineering and Medicine. Likewise, I have presented, discussed and taught science in numerous international conferences, workshop events and fairs to the general public, university students, leading academics, VIP business executives, and members of the UK Parliament. I have also supervised a number of PhD and MSc students.

Spatially Embedded Networks

A network is formed by nodes connected by edges, often used to represent relations between objects on which a number of processes may take place. The internet for example currently has about 4.84 billion web pages indexed by google, which you can reach through your browser. Unlike social, neural and cyber networks however, many other complex networks such as our transport infrastructure, power grid lines, and wireless mobile phone networks, are very much affected by the metric space (often Euclidian) in which they reside. The reason for this really boils down to costs of deployment, reliability against system failures or attacks, and efficiency in performing the desired process. Space therefore dictates network topology and forms the skeleton on which critical network processes function. Characterizing and understanding the structure of this skeleton is crucial from both a scientific and engineering point of view. Marc Barthélemy has an excellent review paper on this fascinating topic.
My personal interest in spatially embedded networks, relates to wireless communications and the many sources of randomness found therein (both spatial and temporal), which from a mathematical point of view, can facilitate for a meaningful statistical analysis, and therefore engineering design and optimization. A list of my published work can be found here.
My collaborators Justin Coon and Carl Dettmann have recently won a £2m grant from EPSRC called Spatially Embedded Networks (SEN) aimed at creating new analytical techniques and models for graphs embedded within a bounding geometry. The focus of SEN is on mobility, spectral properties, trust, security, and temporal variations.

Mathematical Billiards

During my Phd I specialized on the escape properties of "open" chaotic dynamical systems and in particular mathematical billiards. Open here refers to systems whose content may escape through some pre-specified hole. Such investigations are both of mathematical and physical interest as they offer a kind of spectroscopy into the corresponding closed system's dynamics. This research topic has strong overlaps with chaotic dynamics, statistical mechanics, and ergodic theory, where it is often more useful to think in terms of the macroscopic observable behaviours rather than particular microscopic states. Moreover, much of the classical billiard dynamics can be interpreted as the high energy limit of their quantum counterparts, with open billiards offering insights into non-Hermitian quantum dynamics and fractal Weyl laws.

Quantum Transport

I am also interested in the dynamical properties of quantum transort. Examples include reflecting quantum wavepackets across different interfaces, waveguides, and propagation through dissordered media (see Anderson localization).

Other Interests

In my free time, I paint, I cook, I read philosophy (my curent favorite is Marinoff's Plato, not Prozac!), and play the Djembe (badly, but I'm slowly improving, but still quite badly). Recently, I've also taken up SCUBA diving at the Severnside Sub Aqua Club where I'm a qualified BSAC Ocean Diver.

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Orestis Georgiou

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Contact Details

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Mailing address: Ultrahaptics, The West Wing, Glass Wharf, Bristol, BS2 0EL, UK.