English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Gottesman-Kitaev-Preskill (GKP) quantum error-correcting code has emergedas a key technique in achieving fault-tolerant quantum computation usingphotonic systems. Whereas [Baragiola et al., Phys. Rev. Lett. 123, 200502(2019)] showed that experimentally tractable Gaussian operations combined withpreparing a GKP codeword $\lvert 0\rangle$ suffice to implement universalquantum computation, this implementation scheme involves a distillation of alogical magic state $\lvert H\rangle$ of the GKP code, which inevitably imposesa trade-off between implementation cost and fidelity. In contrast, we propose ascheme of preparing $\lvert H\rangle$ directly and combining Gaussianoperations only with $\lvert H\rangle$ to achieve the universality without thismagic state distillation. In addition, we develop an analytical method toobtain bounds of fundamental limit on transformation between $\lvert H\rangle$and $\lvert 0\rangle$, finding an application of quantum resource theories tocost analysis of quantum computation with the GKP code. Our results lead to anessential reduction of required non-Gaussian resources for photonicfault-tolerant quantum computation compared to the previous scheme.

Cost-Reduced All-Gaussian Universality with the Gottesman-Kitaev-Preskill Code: Resource-Theoretic Approach to Cost Analysis