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 Communjournal_title
Nature communicationsauthors
Aolita L,Gogolin C,Kliesch M,Eisert Jdoi
10.1038/ncomms9498subject
Has Abstractpub_date
2015-11-18 00:00:00pages
8498issn
2041-1723pii
ncomms9498journal_volume
6pub_type
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