Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mitigating indistinguishability issues in photon pair sources by
  delayed-pump Intermodal Four Wave Mixing   Large arrays of independent, pure and identical heralded single photon
sources are ubiquitous in today's Noise Intermediate Scale Quantum devices
(NISQ). In the race towards the development of increasingly ideal sources,
delayed-pump Intermodal Four Wave Mixing (IFWM) in multimode waveguides has
recently demonstrated record performances in all these metrics, becoming a
benchmark for spontaneous sources in integrated optics. Despite this,
fabrication imperfections still spoil the spectral indistinguishability of
photon pairs from independent sources. Here we show that by tapering the width
of the waveguide and by controlling the delay between the pump pulses, we add
spectral tunability to the source while still inheriting all the record metrics
of the IFWM scheme. This feature is used to recover spectral
indistinuishability in presence of fabrication errors. Under realistic
tolerances on the waveguide dimensions, we predict >99.5% indistinguishability
between independent sources on the same chip, and a maximum degradation of the
Heralded Hong Ou Mandel visibility <0.35 %.

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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas