Current graduate students

Benjamin Lovitz of the Department of Physics and Astronomy is presenting his thesis:

Practical Quantum Fingerprinting and Appointment Scheduling

Benjamin is supervised by IQC faculty member Norbert Lütkenhaus.

Jie Lin of the Department of Physics and Astronomy is presenting his thesis:

Security proofs for quantum key distribution protocols by numerical approaches

Jie is supervised by IQC faculty member Norbert Lütkenhaus.

Christian Mastromattei of the Department of Physics and Astronomy is presenting his thesis:

Assessing the Practicality of a Simple Multi-node Quantum Repeater

Christopher is supervised by IQC faculty member Norbert Lütkenhaus.

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

Producing Polarization Entangled States Using a Bright Single Photon Source

Morgan Mastrovich, Master's Student

Christopher Warren of the Department of Physics and Astronomy is presenting his thesis:

Towards Analog Quantum Simulation of Lattice Gauge Fields

Christopher is supervised by IQC faculty member Christopher Wilson.

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.

Behrooz Semnani, PhD candidate, Department of  Electrical and Computer Engineering, University of Waterloo  

Recent rapid advancements in nanofabrication technologies have widened the realm of possibilities in nanophotonics, nonlinear and sub-wavelength optics. Realizing nonlinear optics in subwavelength scale paves the way for low cost integrated photonics. Ultra-high-Q photonic crystal nanocavities and nanostructured materials are examples of such structures. Those structures offer very small mode volume guaranteeing highly enhanced field intensity.

Hugo Zbinden, Université de Genève

An approach to quantum random number generation based on unambiguous quantum state discrimination (USD) is developed. We consider a prepare-and-measure protocol, where two non-orthogonal quantum states can be prepared, and a measurement device aims at unambiguously discriminating between them.

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.