Dear quanta,
We will have a group meeting tomorrow (11am, 6-310) and Quntao will speak.
aram
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Hi all,
Tomorrow Peter will talk about recent work on variational quantum error
correction at our first group meeting of the year. As usual, we'll be at
3:30 PM in the Division Room. Peter's title and abstract are below.
See you there,
Ian
-----------------
Title: Variational quantum error correction: a new approach to combatting
noise in quantum computers
Abstract: Current approaches to fault-tolerant quantum computation will not
facilitate useful quantum computation on near-term devices of 50 to 100
qubits. Leading proposals, such as the color code and surface code schemes,
must devote a debilitatingly large fraction of their physical quantum bits
to quantum error correction. Alternative approaches to protecting quantum
information are needed.
In the first part of the talk, I will build an intuitive picture of quantum
error correction. In the second part, I will describe an alternative
approach to quantum error correction which I have been helping to develop,
that is based on recent quantum machine learning techniques. The *variational
quantum error correction* method aims to reduce the resource overhead by
optimizing encoding and decoding circuits to drive the quantum channel
capacity towards the limit defined by the actual noise in the device, as
opposed to that of an artificial noise model. The scheme employs a quantum
circuit with parameters that are variationally-optimized according to
processed data originating from quantum sampling of the device. I'll
explain how this approach achieves preservation of quantum memory, I will
analyze its performance with simulations, and describe how the approach
"exploits" coherence in the noise processes.
