Events

Filter by:

Limit to events where the first date of the event:
Date range
Limit to events where the first date of the event:
Limit to events where the title matches:
Limit to events where the type is one or more of:
Limit to events tagged with one or more of:
Limit to events where the audience is one or more of:
Wednesday, March 20, 2019 10:30 am - 10:30 am EDT (GMT -04:00)

How to learn a quantum state

John Wright, Massachusetts Institute of Technology (MIT)

In the area of quantum state learning, one is given a small number of "samples" of a quantum state, and the goal is use them to determine a feature of the state. Examples include learning the entire state ("quantum state tomography"), determining whether it equals a target state ("quantum state certification"), or estimating its von Neumann entropy. These are problems which are not only of theoretical interest, but are also commonly used in current-day implementation and verification of quantum technologies.

Friday, March 22, 2019 11:45 am - 11:45 am EDT (GMT -04:00)

RAC1 Journal Club/Seminar Series

An introduction to making scientific figures with Illustrator and Blender

Special guest speaker: Christopher Gutierrez, University of British Columbia

Scientific research can be a slow and laborious process. The absolutely final step in the process is to then communicate your exciting scientific findings to other scientists both in and outside of your field. Yet it is often at this final step where the least amount of time is spent.

Thursday, March 28, 2019 4:00 pm - 4:00 pm EDT (GMT -04:00)

Real algebra, random walks, and information theory

Tobias Fritz, Perimeter Institute

Similar to how commutative algebra studies rings and their ideals, the protagonists of real algebra are ordered rings. Their interplay between algebra and geometry is studied in terms of Positivstellen- stze, real analogs of the Nullstellensatz, which go back to Artin's solution of Hilbert's 17th problem. I will describe some of the state of the art in this eld, and then introduce a new Positivstellensatz which unies and generalizes several of the existing ones.

Friday, April 5, 2019 11:45 am - 11:45 am EDT (GMT -04:00)

RAC1 Journal Club/Seminar Series

Journal club presentation:

"Experimental superposition of orders of quantum gates" by Procopio et. al.

(Nature Comms 6, 7913 (2015)

Arash Ahmadi, Institute for Quantum Computing

Quantum computers achieve a speed-up by placing quantum bits (qubits) in superpositions of different states. However, it has recently been appreciated that quantum mechanics also allows one to ‘superimpose different operations’.

Monday, April 8, 2019 2:30 pm - 2:30 pm EDT (GMT -04:00)

Custom low-dimensional material systems explored at the atomic scale

Adina Luican-Mayer, University of Ottawa

Innovative technologies have a history of capitalizing on the discovery of new physical phenomena, often at the confluence of advances in material characterization techniques and innovations in design and controlled synthesis of high-quality materials. Pioneered by the discovery of graphene, atomically thin materials (2D materials) hold the promise for realizing physical systems with distinct properties, previously inaccessible.

Friday, April 12, 2019 10:15 am - 10:15 am EDT (GMT -04:00)

Approximate QLDPC codes from spacetime Hamiltonians

Chinmay Nirkhe, University of California, Berkeley

We study approximate quantum low-density parity-check (QLDPC) codes, which are approximate quantum error-correcting codes specified as the ground space of a frustration-free local Hamiltonian, whose terms do not necessarily commute. Such codes generalize stabilizer QLDPC codes, which are exact quantum error-correcting codes with sparse, low-weight stabilizer generators (i.e. each stabilizergenerator acts on a few qubits, and each qubit participates in a few stabilizer generators).