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Building a Quantum Computer with Cat Codes

Relatori

    Fernando Brandao

    California Institute of Technology, Pasadena, USA

Abstract

A comprehensive architectural analysis for a fault-tolerant quantum computer based on cat codes concatenated with outer quantum error-correcting codes is presented. The construction significantly improves upon the fidelity of physical Toffoli gates at very low qubit cost. To achieve even lower overheads,  a new magic-state distillation protocol for Toffoli states is devised.  For the physical hardware, we propose a system of acoustic resonators coupled to superconducting circuits with a two-dimensional layout. We find that with around 1,000 superconducting circuit components, one could construct a fault-tolerant quantum computer that can run circuits which are intractable for classical supercomputers. Hardware with 32,000 superconducting circuit components, in turn, could simulate the Hubbard model in a regime beyond the reach of classical computing.



 


Classe di Scienze

Il seminario si terrà in modalità telematica. link per collegarsi all'evento:


https://teams.microsoft.com/l/meetup-join/19%3ameeting_NzU5NTA2ZDktNzM5Mi00MmU1LTk0MWEtODEyOGM3YTI3OTA1%40thread.v2/0?context=%7b%22Tid%22%3a%2260240b54-f639-46a1-bf85-a1aba95550fe%22%2c%22Oid%22%3a%22df617d80-ba12-4ff2-ae69-20d7ab765dbb%22%7d

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