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Quantum computing state-of-play and the future of the Internet of Things
The aim of this talk was to examine the current state of software and hardware developments in quantum computing and understand their implications for the future of the Internet of Things (IoT). This talk considered the current level of readiness of quantum computing technologies, opportunities quantum computing technologies could create for IoT, and possible unknowns posed by quantum computing technologies to the emerging IoT ecosystem. The talk explored possible trajectories of development and implications for key market players in both these technologies.
This talk was delivered as part of an invitation-only speaker series in the 6th IEEE IoT Summit at the Radio & Wireless Week (RWW) 2023
Quantum gambling using mesoscopic ring qubits
Quantum Game Theory provides us with new tools for practising games and some
other risk related enterprices like, for example, gambling. The two party
gambling protocol presented by Goldenberg {\it et al} is one of the simplest
yet still hard to implement applications of Quantum Game Theory. We propose
potential physical realisation of the quantum gambling protocol with use of
three mesoscopic ring qubits. We point out problems in implementation of such
game.Comment: 4 pages, 1 figure, poster during XXX Intern. Conf. of Theoretical
Physics, Electron correlations in nano- and microsystems, Ustron 9-14
September 2006. Minor corrections, references added; to appear in physica
status solidi
Quantum 2-Body Hamiltonian for Topological Color Codes
We introduce a two-body quantum Hamiltonian model with spins-\half located
on the vertices of a 2D spatial lattice. The model exhibits an exact
topological degeneracy in all coupling regimes. This is a remarkable
non-perturbative effect. The model has a gauge group symmetry
and string-net integrals of motion. There exists a gapped phase in which the
low-energy sector reproduces an effective topological color code model. High
energy excitations fall into three families of anyonic fermions that turn out
to be strongly interacting. All these, and more, are new features not present
in honeycomb lattice models like Kitaev model.Comment: Cotribution to the Proceedings of the Scala Conference 2009 (Cortina,
Italy). Special Issue dedicated to Prof. Prof. Tombesi, on occasion of his
seventieth birthday. Editors: D. Vitali, I Marzoli, S. Mancini, G. Di
Giuseppe. "Fortschritte der Physik
Variable Bias Coin Tossing
Alice is a charismatic quantum cryptographer who believes her parties are
unmissable; Bob is a (relatively) glamorous string theorist who believes he is
an indispensable guest. To prevent possibly traumatic collisions of
self-perception and reality, their social code requires that decisions about
invitation or acceptance be made via a cryptographically secure variable bias
coin toss (VBCT). This generates a shared random bit by the toss of a coin
whose bias is secretly chosen, within a stipulated range, by one of the
parties; the other party learns only the random bit. Thus one party can
secretly influence the outcome, while both can save face by blaming any
negative decisions on bad luck.
We describe here some cryptographic VBCT protocols whose security is
guaranteed by quantum theory and the impossibility of superluminal signalling,
setting our results in the context of a general discussion of secure two-party
computation. We also briefly discuss other cryptographic applications of VBCT.Comment: 14 pages, minor correction
A critical look at strings
This is an invited contribution to the Special Issue of "Foundations of
Physics" titled "Forty Years Of String Theory: Reflecting On the Foundations".
I have been asked to assess string theory as an outsider, and to compare it
with the theory, methods, and expectations in my own field.Comment: 7 page
Anomalously Slow Cross Symmetry Phase Relaxation, Thermalized Non-Equilibrated Matter and Quantum Computing Beyond the Quantum Chaos Border
Thermalization in highly excited quantum many-body system does not
necessarily mean a complete memory loss of the way the system was formed. This
effect may pave a way for a quantum computing, with a large number of qubits
--1000, far beyond the quantum chaos border. One of the
manifestations of such a thermalized non-equilibrated matter is revealed by a
strong asymmetry around 90 c.m. of evaporating proton yield in the
Bi(,p) photonuclear reaction. The effect is described in terms of
anomalously slow cross symmetry phase relaxation in highly excited quantum
many-body systems with exponentially large Hilbert space dimensions. In the
above reaction this phase relaxation is about eight orders of magnitude slower
than energy relaxation (thermalization).Comment: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and
Applications) at http://www.emis.de/journals/SIGMA
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