Force sensing based on coherent quantum noise cancellation in a hybrid optomechanical cavity with squeezed-vacuum injection. (21st July 2016)

• Record Type: Journal Article
• Authors: Motazedifard, Ali; Bemani, F; Naderi, M H; Roknizadeh, R; Vitali, D
• Is Part Of: New journal of physics. Volume 18:Number 7(2016:Jul.)
• Publication Date: 2016-07-21
• Subjects: force sensing -- standard quantum limit -- hybrid cavity optomechanical system -- squeezed light; 42.50.Dv -- 03.65.Ta -- 42.50.Wk; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/18/7/073040
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We propose and analyse a feasible experimental scheme for a quantum force sensor based on the elimination of backaction noise through coherent quantum noise cancellation (CQNC) in a hybrid atom-cavity optomechanical setup assisted with squeezed vacuum injection. The force detector, which allows for a continuous, broadband detection of weak forces well below the standard quantum limit (SQL), is formed by a single optical cavity simultaneously coupled to a mechanical oscillator and to an ensemble of ultracold atoms. The latter acts as a negative-mass oscillator so that atomic noise exactly cancels the backaction noise from the mechanical oscillator due to destructive quantum interference. Squeezed vacuum injection enforces this cancellation and allows sub-SQL sensitivity to be reached in a very wide frequency band, and at much lower input laser powers.