IQC Special Colloquium - Aziza Suleymanzade, Harvard University

200 University Ave W. Waterloo ON - ZOOM only

The experimental development of quantum networks marks a significant scientific milestone, poised to enable secure quantum communication, distributed quantum computing, and entanglement-enhanced nonlocal sensing. In this talk, I will discuss the recent advancements in the field along with the outstanding challenges through my work on two different platforms: Silicon Vacancy defects in diamond nanophotonic cavities and Rydberg atoms coupled to hybrid cavities. First, I will present our recent results on distributing entanglement across a two-node network with on-chip solid-state defects in cavities which we built at Harvard. We demonstrated high-fidelity entanglement between communication and memory qubits and showed long-distance entanglement over the 35 km of deployed fiber in the Cambridge/Boston area. Second, I will describe our work at the University of Chicago on using Rydberg atoms as transducers of quantum information between optical and microwave photons, with the goal of integrating Rydberg platforms with superconducting circuits and paving the way for advanced quantum network architectures. The talk will conclude with a perspective on the potential of this hybrid platform approach in constructing quantum networks, highlighting the uncharted scientific and technological opportunities it could unlock.

Federal funding will accelerate quantum startups’ products and solutions for domestic and global markets.

The Government of Canada announced on February 22 it is investing more than $17.2 million in funding through the Regional Quantum Initiative to support startup companies in Southern Ontario’s quantum technology sector, including two companies that have spun out from the University of Waterloo, High Q Technologies Inc., with an investment of $3.7 million and Foqus Technologies Inc., with an investment of $601,975.  

Researchers from IQC, MIT, and the University of Illinois at Urbana-Champaign have developed a technique for better identification and control of microscopic defects in diamond, as detailed in PRX Quantum, paving the way for the creation of larger qubit systems for enhanced quantum sensing. This breakthrough, led by Alexandre Cooper-Roy, represents a significant advancement in quantum sensing, offering potential revolutionary impacts across various industries and scientific fields.

IQC Seminar - Zahra Khanian, Technical University of Munich

200 University Ave W. Waterloo On Can QNC 1201

In the seminal 1948 paper "a mathematical theory of communication", Shannon introduced the concept of a classical source as a random variable and established its optimal compression rate, given by Shannon entropy. Nearly five decades later, Schumacher rigorously defined the notion of a quantum source and its compressibility. Schumacher's definition involved a quantum system and correlations with a purifying reference system. In our work, we build upon Schumacher's quantum source model, extending it to the most general form allowed by quantum mechanics. This extension involves considering the source and the reference in a mixed state, along with the presence of additional systems treated as side information. We address and solve various problems posed by these modifications, determining the optimal compression rates. While our work contributes significant progress in quantum source compression, we point out remaining open questions that require further exploration.

En francais

Congratulations to Institute for Quantum Computing (IQC) faculty members Dr. David Cory, Dr. Thomas Jennewein and Dr. Chris Wilson, who have each received approximately $3 million in funding for advancing their research into the real-world applications of quantum technology.

En francais

Researchers at the Institute for Quantum Computing are leading Canada’s first quantum satellite to protect tomorrow’s data.

In our increasingly digital and interconnected world, graduate students like Kimia Mohammadi constantly innovate to stay ahead of emerging security risks. She is part of a national team creating Canada’s first quantum satellite, currently scheduled for launch in 2025. The Quantum EncrYption and Science Satellite (QEYSSat) mission will be a demonstration of secure ground-to-space quantum communication.

Arithmetic and Synthesis of Quantum Circuits

Research Advancement Centre, 475 Wes Graham Way, Room RAC 2009, Waterloo, ON, CA N2L 6R2

In this talk I will introduce some basic aspects of quantum circuit synthesis over various gate sets for qubits and qutrits. The main reference for this work is: https://arxiv.org/pdf/2311.08696.pdf 
I will also talk about the relationship between synthesis, SIC-POVMs and magic states. This is work done with Dinesh Valluri, Michele Mosca, Jon Yard, Sam Winnick and Manimugdha Saikia.

En francais

Diamonds are one of the most sought-after and versatile gemstones in the world, with purposes beyond jewelry and drill tips. In quantum research, diamonds are frequently studied because of the presence of special defects called colour centers, which can act as a quantum bit, or qubit, to store information in quantum systems.

Dr. Mohammad Soltani, a postdoctoral fellow at the Institute for Quantum Computing (IQC) is studying ways to implement patterns in diamonds for quantum applications. Recently, his experiments led to a miniscule but recognizable pattern: IQC’s logo, etched into a 2.5 mm square diamond. The smallest logo produced measured just 20 micrometers — about one fourth the width of a single human hair.