The seminar consists of a 45-minute talk followed by refreshments and informal discussions.

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RECORDING: This talk will be recorded, but will not be live-streamed. The audience will not be visible in the recording. By attending, you acknowledge that your voice may be captured during the Q&A.
The recording will be shared as part of DIREC’s Quantum Computing seminar series via DIREC’s and QCA’s communication channels. We will also post a link here when it becomes available.

The qubit quality of available quantum devices is increasing, yet it is expected that individual qubit operations (gates) will remain noisy for the foreseeable future. The execution of a sizeable quantum algorithms (e.g. factoring numbers, simulating materials), therefore requires a software solution to the noise problem. In essence, one needs to simulate a virtual noiseless quantum processor with a physical noisy quantum device. Is this possible at all? Yes, says a foundational result from the 90s (if the gate noise is below a threshold). I will start by giving some key ideas and intuition behind this result. 

In contrast to stand-alone single-core quantum computers, in many distributed scenarios (e.g. a multi-core quantum processor or the quantum internet) quantum processors need to pass qubits among each other, and have therefore quantum inputs, quantum outputs or even both. Just imagine the communication from one noisy quantum devices to another one via even noisier quantum communication channels. Also, such scenarios need to be secured against noise. It's possible - I will explain how ;-)

Matthias Christandl is a professor of Mathematics at the University of Copenhagen developing Quantum Software for a future Quantum Computer. He is the Center Leader of the Quantum for Life Center funded by the Novo Nordisk Foundation, Principal Investigator of the Center for the Mathematics of Quantum Theory (QMATH), and Chairman of the University of Copenhagen's Quantum Hub.

He has previously held faculty positions at LMU Munich and ETH Zurich and holds a PhD from the University of Cambridge. Matthias Christandl is elected member of the Royal Danish Academy of Sciences and Letters and has chaired the Program Committee of the Conference on Quantum Information Processing (QIP) in the year 2019.

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