Events

Towards Integrated Photonics for Quantum Computation

Hugo Cable, University of Bristol, UK

I will give an overview of work at the Centre for Quantum Photonics towards implementation of large-scale linear-optical quantum computing (LOQC) using quantum photonics. Our current research addresses the key obstacles to scalable LOQC, namely overcoming nondeterminism, achieving loss tolerance, and manufacturability.

On the geometry of entanglement

Rotem Liss, Technion – Israel Institute of Technology

Entanglement is an important concept in quantum information and computing. In this talk, I present a simple geometrical analysis of all rank-2 quantum mixed states. The analysis is complete for all the bipartite states, and is partial for all the multipartite states.

The Quantum Neutron

Dmitry Pushin

The neutron, one of the most common building blocks of matter, is also a unique probe for studying materials and fundamental interactions. The only electrically-neutral nucleus, the neutron passes through most materials with ease, even at the lowest energies. Nowadays neutrons, even with their ~ 15 minute lifetime, are used to study problems ranging from charging and discharging of common batteries to cosmological dark energy. Here I will focus on the neutron as a quantum particle.

Chiral Atomically Thin Films

Cheol-Joo Kim, Cornell University

Chiral materials possess left- and right-handed counterparts linked by mirror symmetry. These materials are useful for advanced applications in polarization optics[1,2], stereochemistry[3,4] and spintronics[5]. In particular, the realization of spatially uniform chiral films with atomic-scale control of their handedness could provide a powerful means for developing nanodevices with novel chiral properties.

Tentative title: Experiments in Si:P Defects with NMR

If you're coming from the Lazaridis Centre, take the 11:35am shuttle from QNC to RAC1, and they can return to QNC from RAC1 @ 1:15pm.

A light lunch will be provided.

Nonlocal Correlations between Frequency Entangled Two-Qudit States

Sacha Schwarz, University of Bern

In my talk, I will demonstrate our method to experimentally encode qudits in the energy spectrum of broadband entangled photons generated by parametric down-conversion and detected in coincidence by sum frequency generation. Employing techniques from ultrafast optics to shape fs-laser pulses, the two-photon spectrum is discretized into frequency bins.

Zachary Webb of the Department of Physics and Astronomy is defending his thesis:

The computational power of many-body systems

Zak is supervised by Assistant Professor Andrew Childs.

Single-photon implementation of an indefinite causal order

Lorenzo M. Procopio, University of Vienna

Investigating the role of causal order in quantum mechanics has recently revealed that the temporal distribution of events may not be a-priori well-defined in quantum theory. Although this has triggered a growing interest on the theoretical side, the existence of processes without a causal order is an experimental question. In this talk, I will present an optical implementation of an indefinite causal-order structure called quantum switch for two purposes; to execute an algorithm and to verify a causally non-separable process.

Continuous-variable quantum communication activities in Erlangen, Germany

Imran Khan, Max Planck Institute for the Science of Light

I will present our ongoing work on the subject of experimental quantum

communication using continuous variables, which is conducted at the Max

Planck Institute for the Science of Light in Erlangen, Germany. The work

is performed in the Quantum Information Processing group of Dr.

Christoph Marquardt within the division of Prof. Dr. Gerd Leuchs.

My talk will encompass the following topics:

Superchiral Field, Phase Modulation, Optical Cloaking

Joseph Choi, University of Rochester

Quantum mechanical or classical interactions between light and matter can demonstrate interesting effects even in simplified models. I will present three such works. The first is a semi-classical theory that corrects the enhancement from a "superchiral" field, by including the magnetic susceptibility term which is usually ignored because of how small it is.