Foundations of quantum mechanics: Creative procrastination
Chapter in Quantum Paths: Festschrift in Honor of Berge Englert on his 60th Birthday, (2015) 199-202
The ultimate physical limits of privacy.
Nature 507:7493 (2014) 443-447
Abstract:
Among those who make a living from the science of secrecy, worry and paranoia are just signs of professionalism. Can we protect our secrets against those who wield superior technological powers? Can we trust those who provide us with tools for protection? Can we even trust ourselves, our own freedom of choice? Recent developments in quantum cryptography show that some of these questions can be addressed and discussed in precise and operational terms, suggesting that privacy is indeed possible under surprisingly weak assumptions.Random, Complex, and Quantum
Chapter in The Art of Science, Springer Nature (2014) 191-204
Witnessing quantum coherence in the presence of noise
ArXiv 1312.5724 (2013)
Abstract:
We address the problem of assessing the coherent character of physical evolution. We take the quantum Zeno effect (QZE) as a characteristic trait of quantum dynamics, and derive relations among transfer rates as a function of the strength of a measurement. These relations support the intuition that only quantum dynamics is susceptible to QZE. With the derived bounds on the magnitude of coherent dynamics, we propose an experimentally accessible coherence witness. Our results have potential application in assessing coherence of quantum transport in biological and other complex many-body systems.Artur Ekert on the physical reality of - √NOT
Chapter in ALAN TURING: HIS WORK AND IMPACT, (2013) 102-105