Reliable quantum certification of photonic state preparations.

Abstract:

:Quantum technologies promise a variety of exciting applications. Even though impressive progress has been achieved recently, a major bottleneck currently is the lack of practical certification techniques. The challenge consists of ensuring that classically intractable quantum devices perform as expected. Here we present an experimentally friendly and reliable certification tool for photonic quantum technologies: an efficient certification test for experimental preparations of multimode pure Gaussian states, pure non-Gaussian states generated by linear-optical circuits with Fock-basis states of constant boson number as inputs, and pure states generated from the latter class by post-selecting with Fock-basis measurements on ancillary modes. Only classical computing capabilities and homodyne or hetorodyne detection are required. Minimal assumptions are made on the noise or experimental capabilities of the preparation. The method constitutes a step forward in many-body quantum certification, which is ultimately about testing quantum mechanics at large scales.

journal_name

Nat Commun

journal_title

Nature communications

authors

Aolita L,Gogolin C,Kliesch M,Eisert J

doi

10.1038/ncomms9498

subject

Has Abstract

pub_date

2015-11-18 00:00:00

pages

8498

issn

2041-1723

pii

ncomms9498

journal_volume

6

pub_type

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