# Events by month

## December 2016

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### Seminar: Karol Zyczkowski

Friday, December 2, 2016 — 12:30 to 12:30 PM EST

Structured Hadamard matrices and quantum information

Karol Zyczkowski, Jagiellonian University, Poland

Two classes of complex Hadamard matrices with certain special properties found recently applications in quantum physics. Consider a four index tensor $T_{ijkl}$ of size M. It can be reshaped into a square matrix $A_{\mu,\nu}$ of size $M^2$ with three different choices of composed indices e.g. $\mu=(i,j); \nu=(k,l)$ or $\mu=(i,k); \nu=(j,l)$, or $\mu=(i,l); \nu=(j,k)$.

### Theory of Quantum Information and Computation: Dave Touchette

Monday, December 5, 2016 — 11:45 to 11:45 AM EST

Exponential Separation between Quantum Communication Complexity and Classical Information Complexity

Dave Touchette, IQC

We exhibit a Boolean function for which the quantum communication complexity is exponentially larger than the classical information complexity. An exponential separation in the other direction was already known from the work of Kerenidis et. al. [SICOMP 44, pp. 1550--1572], hence our work implies that these two complexity measures are incomparable. As classical information complexity is an upper bound on quantum information complexity, which in turn is equal to amortized quantum communication complexity, our work implies that a tight direct sum result for distributional quantum communication complexity cannot hold.

### PhD Thesis - Greg Holloway

Tuesday, December 6, 2016 — 2:00 PM EST

Greg Holloway of the Department of Physics and Astronomy is defending his thesis:

Electron transport in semiconducting nanowires and quantum dots

Greg is supervised by Associate Professor Joanthan Baugh.

### RAC1 Journal Club/Seminar Series: Holger Haas

Friday, December 9, 2016 — 11:45 to 11:45 AM EST

NMR 'diffraction' in solids

Holger Haas, IQC

Peter Mansfield and Peter Grannell discussed the possibility of NMR crystallography in their 1973 seminal paper 'NMR 'diffraction' in solids?', however, an experimental realisation of NMR 'diffraction' is yet to be demonstrated. I will discuss the feasibility of NMR crystallography in the light of recent advances in nanoscale MRI which combine numerical control finding algorithms and state of the art force detected magnetic resonance techniques.

### Colloquium: Carlos Silva

Monday, December 12, 2016 — 2:30 PM EST

Two-dimensional coherent photocurrent excitation spectroscopy of a hybrid lead-halide perovskite solar cell

Carlos Silva, Université de Montréal

### PhD Thesis - Matthew Graydon

Monday, December 12, 2016 — 2:30 PM EST

Matthew Graydon of the Department of Physics and Astronomy is defending his thesis:

Conical Designs and Categorical Jordan Algebraic Post-Quantum Theories

Matthew is supervised by Associate Professor Kevin Resch and Rob Spekkens (Perimeter Institute for Theoretical Physics).

### Theory of Quantum Information and Computation: Hugo J. Woerdeman

Monday, December 12, 2016 — 11:45 PM EST

The 2xM separability problem investigated via semidefinite programming and normal completions

Hugo J. Woerdeman, Drexel University

### Seminar: Sara Hosseini

Tuesday, December 13, 2016 — 2:00 PM EST

Experimental demonstration of Gaussian protocols for one-sided device-independent quantum key distribution

Sara Hosseini, The Australian National University

Nonlocal correlations, which was a longstanding foundational topic in quantum information, have recently found application as a resource for cryptographic tasks where not all devices are trusted. For example, the asymmetric phenomena of Einstein-Podolsky-Rosen steering plays a key role in one-sided device-independent quantum key distribution (1sDI-QKD) protocols.

### Master's thesis - Guillaume Verdon-Akzam

Thursday, December 15, 2016 — 2:00 PM EST

Guillaume Verdon-Akzam of the Department of Applied Mathematics is defending his thesis:

Probing Quantum Fields: Measurements and Quantum Energy Teleportation

Guillaume is supervised by IQC Associate Achim Kempf.

### December 2016

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