Events

Evan Meyer-Scott, Universität Paderborn 

I will present a realization of a great photon pair source based on parametric down-conversion, and discuss a not-so-great limit to the performance of photon pair sources in general. The former is a fully fiber-coupled waveguide pair source with 46% raw heralding efficiency, and no optical alignment required. The latter restricts the achievable heralding efficiency, when spectrally filtering the photons to increase the purity.

Daniel Tennant - University of Texas, Austin

I will report on dynamical magnetic susceptibility measurements of
both bulk and thin film samples of the spin glass Copper Manganese.
By studying the Thermoremanent Magnetization (TRM) of multi-layer thin
films of various thicknesses, we are able to show the maximum energy
barrier encountered during correlated spin flip transitions is cut off
by the thickness of the film and is independent of temperature. The
distribution of energy barriers is shown to follow from a hierarchical

WIN/IQC Joint Distinguished Lecture

Philip Kim is an experimental condensed matter physicist. The focus of Kim’s group’s research is the mesoscopic investigation of various physical phenomena in low dimensional and nanostructured materials.

Mark Howard & Earl T. Campbell

Motivated by their necessity for most fault-tolerant quantum computation schemes, we formulate a resource theory for magic states. We first show that robustness of magic is a well-behaved magic monotone that operationally quantifies the classical simulation overhead for a Gottesman-Knill type scheme using ancillary magic states. Our framework subsequently finds immediate application in the task of synthesizing non-Clifford gates using magic states.

Hear Raymond Laflamme, founding director of the Institute for Quantum Computing and John von Neumann Chair in Quantum Information and Edwin Outwater, Music Director Laureate of the Kitchener-Waterloo Symphony, as they have a conversation about the making of Does God Play Dice (Quantum Etude).

Radio host Mike Farwell will moderate this conversation about their collaboration that integrated quantum physics and music to create a surprisingly random performance piece. You’ll even have the to watch highlights of the April 20 performance.

Physics and Astronomy - Milestone Series

Corey Rae McCrae

​PhD student
Department of Physics & Astronomy and Institute for Quantum Computing

Colloquium: Zhengcheng Gu, The Chinese University of Hong Kong

Searching for p+ip topological superconducting (SC) state has become a fascinating subject in condensed matter physics, as a dream application awaits in topological quantum computation. In this talk, I will report the theoretical discovery of a p+ip SC ground state (coexisting with ferromagnetic order) in honeycomb lattice Hubbard model with infinite repulsive interaction at low doping(< 0.2), by using both the state-of-art Grassmann tensor product state(GTPS) approach and a quantum field theory approach.

Paper Review: The quantum pigeonhole principle and the nature of quantum correlations by Y. Aharonov et al., arXiv:1407.3194

Arash Ahmadi, IQC

Roland Esteban Hablützel Marrero, Centre for Quantum Technologies, National University of Singapore

Three coupled harmonic oscillators with an interaction given by the trilinear Hamiltonian $a^{\dagger} b c + a b^{\dagger} c^{\dagger}$ can describe a wide range of physical processes. In this talk I will show how we implement the trilinear Hamiltonian utilizing a chain of three $^{171}$Yb$^+$ ions in a linear Paul trap.

PhD Thesis Presentation
Corey Rae McRae