Future graduate students

Monday, August 15, 2016 2:30 pm - 2:30 pm EDT (GMT -04:00)

Seminar: Hugo Cable

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.

Thursday, August 11, 2016 12:00 pm - 12:00 pm EDT (GMT -04:00)

Special seminar: Vincent Russo

Extended nonlocal games and monogamy-of-entanglement games

Vincent Russo, Institute for Quantum Computing

Two-player one-round games have served to be an instrumental model in theoretical computer science. Likewise, nonlocal games consider this model when the players have access to an entangled quantum state. In this talk, I will consider a broader class of nonlocal games (extended-nonlocal games), where the referee shares an entangled state along with the players.

Thursday, August 4, 2016 12:00 pm - 12:00 pm EDT (GMT -04:00)

Seminar: Sophie Laplante

Robust Bell inequalities from communication complexity

Sophie Laplante, Université Paris Diderot

The question of how large Bell inequality violations can be, for quantum distributions, has been the object of much work in the past several years. We say a Bell inequality is normalized if its absolute value does not exceed 1 for any classical (i.e. local) distribution.

Monday, August 8, 2016 2:30 pm - 2:30 pm EDT (GMT -04:00)

Colloquium: Ken Brown

Error Models and Error Thresholds

Ken Brown, Georgia Tech

The error threshold for fault-tolerant quantum computation depends
strongly on the error model.  Most calculations assume a depolarizing
model, which allows for efficient calculations based on random
applications of Pauli errors.  We have been exploring how the
threshold changes for both non-unital and coherent operations.  I will

Thursday, May 12, 2016 1:00 pm - 1:00 pm EDT (GMT -04:00)

Seminar: Bruno Huttner

Quantum Technologies for Cyber Security: from threats to solutions

Bruno Huttner, ID Quantique, Switzerland

Recent developments in quantum computers have spurred renewed interest in quantum-safe solutions for information security [1]. It is now widely accepted that the current public key infrastructures, which are the foundation of cyber security, will not withstand the arrival of the quantum computer [2], [3], and that this arrival will occur with high probability within the next ten to fifteen years. New solutions are called for, and these solutions should at least be partly based on quantum technologies.

Friday, May 6, 2016 11:00 am - 11:00 am EDT (GMT -04:00)

Seminar: Alexei Bylinskii

Friction under microscope in a trapped-ion optical-lattice emulator

Alexei Bylinskii, Massachusetts Institute of Technology

Friction is the ubiquitous mechanical process of sticking and energy dissipation at the interface between objects. Despite its technological and economic significance, friction remains poorly understood, being a non-linear, out-of-equilibrium, many-body process. According to the widely known empirical laws of friction, it is proportional to the load on the interface and independent of velocity.

Monday, April 25, 2016 1:00 pm - 1:00 pm EDT (GMT -04:00)

Seminar: Wayne Cheng-Wei Huang

Multicolor quantum channels for nanowire-based photonic devices 

Wayne Cheng-Wei Huang, University of Nebraska-Lincoln 

Using a two-color laser field and tungsten nanotips, we showed that multicolor quantum channels led to a twofold increase in quantum efficiency. By gating quantum efficiency with pulse delay, optical control of electron photoemission was attained for fields with modest intensity. In this talk, I will discuss the observed effect and potential applications for nanowire-based photonics transistors and ultrafast spin-polarized electron sources. 

Wednesday, June 22, 2016 7:00 pm - 7:00 pm EDT (GMT -04:00)

The detection of gravitational waves on earth

Public lecture by Bill Unruh, The University of British Columbia

On February 11, 2016 it was announced that gravitational  waves have been detected affecting an instrument on earth. In addition to the realization of a 100 year old prediction the astounding sensitivity of the detector demanded the approaching and overcoming of seemingly fundamental quantum limits on measuring the motion of 25Kg masses. Quantum mechanics is usually thought of applying only to the very small (zeptogrammes and nanometers).