Events

Generation of a lattice of polarization coupled optical vortex beams

Dusan Sarenac, IQC

Beams of light, atoms, neutrons and electrons can carry orbital angular momentum parallel to their propagation axis. Orbital Angular Momentum (OAM) waves have demonstrated a number of applications in microscopy, encoding and multiplexing of communications, and manipulation of matter. In addition, coupling a two-level system to beams carrying OAM permits a wealth of new applications.

Sascha Agne of the Department of Physics and Astronomy is presenting his thesis:

Exploration of Higher-Order Quantum Interference Landscapes

Sascha is supervised by IQC faculty member Thomas Jennewein.

Fu-Chun Zhang, Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing, China Aug. 14, 2017 at 2 p.m. QNC 1501

Majorana zero mode inside vortex core of topological superconductors

In this talk, I will discuss Majorana zero mode inside vortex core of topological super- conductors, which has recently been observed in experiments. The spin polarized scanning tunneling microscope (STM) shows spin dependent tunneling conductance, which is attributed to spin selective Andreev reflection of the Majorana zero mode inside the vortex.

Chris Ferrie: Quantum Physics for Babies 

Active beam splitting attack applied to coherent-state based QKD protocols

Dmitry Kronberg, Lomonosov Moscow State University

We consider a new type of attack on a coherent state-based quantum key distribution protocols (like coherent one-way (COW) or differential phase-shift (DPS) protocol). The main idea of the attack consists in measuring individually the intercepted states and sending the rest of them unchanged. In some cases, this attack can be considered as a generalization of well-known beam-splitting attack and unambiguous state discrimination attack.

The Quantum Key Distribution (QKD) Summer School, hosted by IQC, equips graduate students and young postdoctoral fellows with a strong foundation in quantum communication, particularly quantum cryptography.

Hsi-Sheng Goan - Department of Physics and Center for Quantum Science and Engineering, National Taiwan University, Taipei

An essential prerequisite for quantum information processing is precise coherent control of the dynamics of quantum systems or quantum bits (qubits). Most of the control sequences implemented in quantum experiments are developed and designed based on the assumption of having ideal (closed) quantum coherent systems.

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.

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

Sara Hosseini, Postdoctoral Fellow

Abstract not available.

Shihan Sajeed is presenting his thesis:

Security Evaluation of Practical Quantum Communication Systems

Shihan is supervised by Christopher Wilson and Vadim Makarov.