Alumni

Local-dimension-invariant stabilizer codes

Protection of quantum information is a central challenge in building a quantum computer. Quantum error-correcting codes can correct for logical errors that occur in the system. A particularly well-studied category is stabilizer codes, such as the 9-qubit Shor code, as these are the quantum analogue of classical additive codes. Qudits (particles with local-dimension greater than 2) have more computational basis states per particle than qubits and retain this feature in stabilizer codes.

Post-quantum security of the Even-Mansour cipher

Chen Bai, University of Maryland, College Park

The Even-Mansour cipher is a simple method for constructing a (keyed) pseudorandom permutation E from a public random permutation P: {0,1}^n ->{0,1}^n. It is a core ingredient in a wide array of symmetric-key constructions, including several lightweight cryptosystems presently under consideration for standardization by NIST.

Geometry of Banach spaces: a new route towards Position Based Cryptography

Aleksander Kubicki, University Complutense of Madrid

In this talk I will explain how some techniques coming from the local theory of Banach spaces can be used to obtain claims about the security of protocols for Position Based Cryptography.

Random quantum circuits transform local noise into global white noise

Alexander Dalzell, Caltech/AWS

We examine the distribution over measurement outcomes of noisy random quantum circuits in the low-fidelity regime. We will show that, for local noise that is sufficiently weak and unital, the output distribution p_noisy of typical circuits can be approximated by F*p_ideal + (1−F)*p_unif, where F is the probability that no local errors occur, p_ideal is the distribution that would arise if there were no errors, and p_unif is the uniform distribution.

Scientists of all backgrounds and genders, have made important contributions in science, technology, engineering and mathematics (STEM), but the participation of women remains low in many areas of STEM, including physics. What can we do to build an inclusive STEM community? Shohini Ghose, IQC associate and Director of the Laurier Centre for Women in Science (WinS) will discuss data that can shed light on where we stand today and describe a practical framework for increasing access and inclusion in STEM.

Observation and manipulation of a phase separated state in a charge density wave material 

A direct product theorem for quantum communication complexity with applications to device-independent QKD
Srijita Kundu, University of Waterloo

Optimal Theory Control Techniques for Nitrogen Vacancy Ensembles 

Nitrogen Vacancy (NV) Centers in diamond are a very versatile tool. A single Nitrogen Vacancy center is most notably known for sensing magnetic fields, but recently has presented itself as a functional node for a quantum internet, to name just two of its wide ranges of applications. 

Quantum Computational Particle Physics