  The gauge-gravity duality has been applied to examine the properties of
holographic superconducting quantum device (SQUID), composed of two S-N-S
Josephson junctions, influenced by dark sector modelled by the additional
$U(1)$-gauge field coupled to the ordinary Maxwell one. The dark matter sector
is known to affect the properties of superconductors and is expected to enter
the current-phase relation. The kinetic mixing between two gauge fields
provides a mechanism allowing for the conceivable observation of the effect. We
find small but visible effect of the dark matter particle traversing the
device, which shows up as a change of its maximal current.
