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SUMMARY:Topical Seminar: Multiparameter quantum metrology with an array of
  entangled BECs
DTSTART;VALUE=DATE-TIME:20261001T090000Z
DTEND;VALUE=DATE-TIME:20261001T100000Z
DTSTAMP;VALUE=DATE-TIME:20260924T222434Z
UID:indico-event-8765@indico.ific.uv.es
DESCRIPTION:In this talk\, I will present experiments carried out at the\n
 University of Basel\, in which we realized multiparameter quantum\nmetrolo
 gy with an array of entangled atomic ensembles [2]. By\ncoherently splitti
 ng a spin-squeezed Bose–Einstein condensate\, we\nfirst generated strong
  entanglement between two spatially separated\ncondensates and used it to 
 demonstrate the\nEinstein–Podolsky–Rosen paradox with massive many-par
 ticle\nsystems [3]. We then extended this approach to an array of BECs.\nL
 ocal spin rotations applied to the individual BEC allow us to\nflexibly co
 nfigure the spin correlations to enhance measurement\nprecision of multipl
 e parameters jointly. Combined with an optimal\nestimation protocol\, thes
 e correlations provide a significant\nprecision advantage beyond the stand
 ard quantum limit [2]. Our\nresults demonstrate how entanglement shared am
 ong sensors can serve\nas a resource for multiparameter estimation and dis
 tributed quantum\nsensing.\n\n[1] Y. Baamara et al.\, SciPost Phys. 14\, 0
 50 (2023).\n[2] Y. Li et al.\, Science 391\, 374 (2026).\n[3] P. Colciaghi
  et al.\, Phys. Rev. X 13\, 021031 (2023).\n\nhttps://indico.ific.uv.es/ev
 ent/8765/
LOCATION:Campus Burjassot 4-4-4426 - Seminari Física Teòrica
URL:https://indico.ific.uv.es/event/8765/
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