Tailoring quantum architectures to implementation style: A quantum computer for mobile and persistent qubits

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

In recent years, quantum computing (QC) research has moved from the realm of theoretical physics and mathematics into real implementations. With many different potential hardware implementations, quantum computer architecture is a rich field with an opportunity to solve interesting new problems and to revisit old ones. This paper presents a QC architecture tailored to physical implementations with highly mobile and persistent quantum bits (qubits). Implementations with qubit coherency times that are much longer than operation times and qubit transportation times that are orders of magnitude faster than operation times lend greater flexibility to the architecture. This is particularly true in the placement and locality of individual qubits. For concreteness, we assume a physical device model based on electron-spin qubits on liquid helium (eSHe). Like many conventional computer architectures, QCs focus on the efficient exposure of parallelism.We present here a QC microarchitecture that enjoys increasing computational parallelism with size and latency scaling only linearly with the number of operations. Although an efficient and high level of parallelism is admirable, quantum hardware is still expensive and difficult to build, so we demonstrate how the software may be optimized to reduce an application's hardware requirements by 25% with no performance loss. Because the majority of a QC's time and resources are devoted to quantum error correction, we also present noise modeling results that evaluate error correction procedures. These results demonstrate that idle qubits in memory need only be refreshedapproximately once every one hundred operation cycles.

Original languageEnglish (US)
Title of host publicationISCA'07
Subtitle of host publication34th Annual International Symposium on Computer Architecture, Conference Proceedings
Pages198-209
Number of pages12
DOIs
StatePublished - Oct 22 2007
EventISCA'07: 34th Annual International Symposium on Computer Architecture - San Diego, CA, United States
Duration: Jun 9 2007Jun 13 2007

Publication series

NameProceedings - International Symposium on Computer Architecture
ISSN (Print)1063-6897

Other

OtherISCA'07: 34th Annual International Symposium on Computer Architecture
CountryUnited States
CitySan Diego, CA
Period6/9/076/13/07

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Keywords

  • Architecture
  • Quantum

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