Faculty

Quantum computing for quantum chemistry

Location: QNC 0101

Making rigorous photon-number cutoff for optical detection setups

Location: RAC 2009

Non-Abelian transport distinguishes three usually equivalent notions of entropy production

Location: QNC 1201

Development and Electronic Characterization of Graphene-Based Hall Effect Devices

Location: C2-361

Quantum Polynomial Hierarchies

Location: QNC 1201

Simulating the Anisotropic XY-model on a Trapped Ion Quantum Simulator

Location: QNC 1201

Efficient Circuit-Based Quantum State Tomography via Sparse Entry Optimization

Location: QNC 1201 and Online on Zoom

Quantum sensing of light with sub-wavelength resolution

Improving information transmission using correlated auxiliary noise

QNC building, 200 University Ave. Room 1201, Waterloo 

Communicating information is a fundamentally important task that is often limited by noise. The physical origin of noise in a quantum channel is an interaction between the transmitted system and its surrounding environment. This interaction leads to correlations between the system and its environment that contain information about the original state, but are inaccessible to the receiver. However, a receiver may be able to recover some of this lost information if they are given access to an additional auxiliary system that interacts with the environment. In this talk, I will formalize a particular type of receiver side information and characterize the resulting improvement in classical and quantum channel capacities for an augmented bit flip channel. I will then discuss information-theoretic bounds on imperfect one-time pad cryptography schemes and passive environment-assisted quantum channel capacities.