# Codes and Expansions (CodEx) Seminar

## Robert Calderbank (Duke University)

Coherent Noise

Quantum computers are moving out of labs and are becoming programmable. However, physical platforms such as trapped ions suffer from coherent noise that does not follow a simple stochastic model. Stochastic errors in quantum systems occur randomly but coherent errors can be more damaging since they can accumulate in a particular direction. This talk will describe how to construct quantum error correcting codes that are oblivious to coherent noise. The new framework removes a physical roadblock to fault tolerant quantum computation, at the cost of only doubling the number of qubits.

This is joint work with Jingzhen Hu, Qingzhong Liang and Narayanan Rengaswamy — for more details see arXiv:2011.00197