Quantum-measurement backaction from a Bose-Einstein condensate coupled to a mechanical oscillator

S. K. Steinke, S. Singh, M. E. Tasgin, P. Meystre, K. C. Schwab, M. Vengalattore

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

We study theoretically the dynamics of a hybrid optomechanical system consisting of a macroscopic mechanical membrane magnetically coupled to a spinor Bose-Einstein condensate via a nanomagnet attached at the membrane center. We demonstrate that this coupling permits us to monitor indirectly the center-of-mass position of the membrane via measurements of the spin of the condensed atoms. These measurements normally induce a significant backaction on the membrane motion, which we quantify for the cases of thermal and coherent initial states of the membrane. We discuss the possibility of measuring this quantum backaction via repeated measurements. We also investigate the potential to generate nonclassical states of the membrane, in particular Schrödinger-cat states, via such repeated measurements.

Original languageEnglish (US)
Article number023841
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number2
DOIs
StatePublished - Aug 25 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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