University of Calgary

Abstract: The Heisenberg limit traditionally provides a lower bound on the phase uncertainty scaling as 1/N, where N is the mean number of photons in the probe. However, this limit has a number of loopholes which potentially might be exploited, to...

Abstract: Fifty years ago, two astronomers, R. Hanbury Brown and R. Q. Twiss, invented a new method to measure the angular diameter of stars, below the limit set by the atmospheric fluctuations. Their proposal prompted a hot debate among physicists...

Abstract On 20 July 1969, millions of people held their breath as they watched, live on television, Neil Armstrong set foot on the Moon. Yet Fox Television has reported that a staggering 20% of Americans have had doubts about the Apollo 11 mission...

Abstract: Squeezing is well understood for harmonic oscillator and spin systems as resulting from ``non-classical’’ correlations between basis states in the Hilbert space. In this talk I will introduce a definition of squeezing for SU(3) systems...

Bio: Henri Darmon specializes in number theory, working on Hilbert's 12th problem and its relation with the Birch-Swinnerton-Dyer conjecture. He is a Fellow of the Royal Society of Canada and currently, a James McGill Professor of Mathematics at...

Abstract: A novel technique used to achieve efficient frequency conversion monolithically in semiconductor is reviewed. It uses Bragg reflection waveguides to obtain monolithic intra-laser cavity parametric processes utilizing c(2). These chip-based...

Modern probability theory, whose foundation is based on the axioms set forth by Kolmogorov, is currently the major tool for performance analysis in stochastic systems. While it offers insights in understanding such systems, probability theory is...

Computational noise in deterministic simulations is as ill-defined a concept as can be found in scientific computing. Roundoff errors, discretizations, numerical solutions to systems of equations, and adaptive techniques can destroy the smoothness of...

We derive new identities for a polynomial analogue of the Stern sequence and define two subsequences of these polynomials. We obtain various properties for these two interrelated subsequences which have 0-1 coefficients and can be seen as extensions...

Doodling has many mathematical aspects: patterns, shapes, numbers,and more. Not surprisingly, there is often some sophisticated and funmathematics buried inside common doodles.I’ll begin by doodling, and see where it takes us.It looks like play, but...