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Towards quantum limited optomechanical force & displacement sensing at room temperatures

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  • UserTania Monteiro (UCL)
  • ClockWednesday 07 February 2018, 13:00-14:00
  • HousePhysics East 217.

If you have a question about this talk, please contact Dr Giovanni Barontini.

There is current interest in working towards future quantum technologies which operate at room temperatures. One approach is based on oscillators (levitated nanoparticles or high-Q membranes) decoupled from major sources of environmental heating and decoherence. The LIGO experiments represents something of a gold-standard for sensing of quantum scale displacements, having detected displacements  10^{-18}m, a small fraction of an atomic nucleus. However these are very much ‘Big science’ projects and the ambition is to develop a new generation of table-top experiments which incorporate some of the advances and understanding of sensing at the standard quantum limit (SQL) and beyond from LIGO , but using such high-Q oscillators. I will review attempts to cool the motion of levitated nanoparticles at UCL

[1] J. Millen, P. Fonseca, T. Mavrogordatos, T.S.Monteiro and P.F. Barker, PRL 114 ,123602 (2015) [2] P. Fonseca, E.Aranas, T.S.Monteiro, P. F. Barker, PRL 117 ,173602 (2016) [3] A. Pontin, J.E. Lang, A. Chowdhury, P. Vezio,F. Marino, B. Morana, E. Serra, F. Marin, T.S. Monteiro, Phys. Rev. Lett. 120, 020503 (2018)

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