Test af identitet af samlinger af kvantetilstande: prøvekompleksitetsanalyse

Test af identitet af samlinger af kvantetilstande: prøvekompleksitetsanalyse

Marco Fanizza1, Raffaele Salvia2og Vittorio Giovannetti3

1Física Teòrica: Informació i Fenòmens Quàntics, Department de Física, Universitat Autònoma de Barcelona, ​​08193 Bellaterra, Spanien.
2Scuola Normale Superiore, I-56127 Pisa, Italien.
3NEST, Scuola Normale Superiore og Istituto Nanoscienze-CNR, I-56127 Pisa, Italien.

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Abstrakt

Vi studerer problemet med at teste identiteten af ​​en samling ukendte kvantetilstande givet prøveadgang til denne samling, hvor hver tilstand optræder med en vis sandsynlighed. Vi viser, at for en samling af $d$-dimensionelle kvantetilstande af kardinalitet $N$, er prøvekompleksiteten $O(sqrt{N}d/epsilon^2)$, med en matchende nedre grænse, op til en multiplikativ konstant . Testen opnås ved at estimere den gennemsnitlige kvadrerede Hilbert-Schmidt-afstand mellem staterne, takket være en passende generalisering af estimatoren af ​​Hilbert-Schmidt-afstanden mellem to ukendte tilstande af Bădescu, O'Donnell og Wright [13].

► BibTeX-data

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Citeret af

[1] Li Gao og Nengkun Yu, "Sample optimal tomography of quantum Markov chains", arXiv: 2209.02240, (2022).

[2] Marco Fanizza, Michalis Skotiniotis, John Calsamiglia, Ramon Muñoz-Tapia og Gael Sentís, "Universelle algoritmer til kvantedataindlæring", EPL (Europhysics Letters) 140 2, 28001 (2022).

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