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2015 ; 6
(ä): 8498
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Reliable quantum certification of photonic state preparations
#MMPMID26577800
Aolita L
; Gogolin C
; Kliesch M
; Eisert J
Nat Commun
2015[Nov]; 6
(ä): 8498
PMID26577800
show ga
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.