Paola Capellaro: Hardware-Efficient quantum error correction codes

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United States QuICS
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A talk by Paola Capellaro at the Workshop on Noisy Intermediate-Scale Quantum Technologies (NISQ), Day 1. NISQ was hosted June 6-7, 2019 by the Joint Center for Quantum Information and Computer Science at the University of Maryland (QuICS). More information about NISQ can be found at https://www.tqcconference.org.

Abstract: Quantum error correction is expected to be essential in large-scale quantum technologies. However, the substantial qubit overhead it requires is thought to greatly limit its utility in smaller NISQ devices. I will discuss strategies to devise families of special-purpose quantum error-correcting codes that offer a reduction in overhead compared to common codes. For example, tailoring the code to address a frequent and dominant source of decoherence in current experiments, such as arising from the qubit coupling to a common fluctuator, can lead to an exponential advantage in terms of qubit resources. Exploiting spatial correlations in the noise can further enable using quantum error correction for quantum sensing, without correcting away the the signal to be measured. More generally, these hardware-efficient and task-optimized codes show the promise of quantum error correction in near-term, pre-fault tolerant devices, while highlighting the need for precise characterization of the noise processes.

COMMENT: Due to a technical glitch during recording, only part of the talk could be uploaded. Apologies for any inconvenience caused.



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