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DTSTAMP:20260424T052121Z
UID:64df3f325926f725933285@ist.ac.at
DTSTART:20240409T110000
DTEND:20240409T120000
DESCRIPTION:Speaker: Carlos Gonzalez-Ballestero\nhosted by Onur Hosten\nAbs
 tract: Optically levitated nanoparticles in high vacuum are a versatile pl
 atform for fundamental quantum science due to the high isolation and large
  dynamical tunability of their center-of-mass motion [1]. Recent demonstra
 tions of motional ground-state cooling of optically levitated nanoparticle
 s [2] have opened the door to engineer quantum coherent motional states\, 
 such as macroscopic superpositions\, and use them to\, among others\, expl
 oring the quantum-to-classical transition and the quantum nature of gravit
 y. A major bottleneck toward these goals is the high level motional decohe
 rence experienced by optically levitated nanoparticles due to laser shot n
 oise (recoil heating). Suppressing this noise is not straightforward as re
 ducing the optical power also decreases the stiffness of the optical trap.
  In this talk I will discuss a strategy to suppress recoil heating noise w
 ithout modifying the optical trap by using light in a vacuum-squeezed stat
 e. By properly engineering the geometric distribution of the incoming sque
 ezed light\, the recoil heating can be suppressed by 50% in current experi
 ments without any mode matching\, and by two orders of magnitude if proper
  mode matching is applied. Our work [3] paves the way toward exploring qua
 ntum physics at unprecedented mass-to-delocalization scales. [1] CGB\, M. 
 Aspelmeyer\, L. Novotny\, R. Quidant\, O. Romero-Isart\, Science 374\, eab
 g3027 (2021)[2] U. Deli\, M. Reisenbauer\, K. Dare\, D. Grass\, V. Vuleti\
 , N. Kiesel\, M. Aspelmeyer\, Science 367\, 892 (2020)[3] CGB\, J. A. Ziel
 iska\, M. Rossi\, A. Militaru\, M. Frimmer\, L. Novotny\, P. Maurer\, O. R
 omero-Isart\, PRX Quantum 4\, 030331 (2023)
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Carlos Gonzalez-Ballestero: Laser noise suppression in levitated op
 tomechanics using squeezed light
URL:https://talks-calendar.ista.ac.at/events/4869
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