Nonclassicality tests and entanglement witnesses for macroscopic mechanical superposition states Article Swipe
YOU?
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· 2015
· Open Access
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· DOI: https://doi.org/10.1103/physreva.91.022114
· OA: W1970679807
We describe a set of measurement protocols for performing non-classicality\ntests and the verification of entangled superposition states of macroscopic\ncontinuous variable systems, such as nanomechanical resonators. Following\nearlier works, we first consider a setup where a two-level system is used to\nindirectly probe the motion of the mechanical system via Ramsey measurements\nand discuss the application of this methods for detecting non-classical\nmechanical states. We then show that the generalization of this techniques to\nmultiple resonator modes allows the conditioned preparation and the detection\nof entangled mechanical superposition states. The proposed measurement\nprotocols can be implemented in various qubit-resonator systems that are\ncurrently under experimental investigation and find applications in future\ntests of quantum mechanics at a macroscopic scale.\n
