Proposal to Test Bell’s Inequality in Electromechanics

Author(s): S. Hofer, K. W. Lehnert, K. Hammerer

Journal: Phys. Rev. Lett

Volume: 116

Page(s): 070406

Year: 2016

DOI Number: 10.1103/PhysRevLett.116.070406

Link: Link to publication


Optomechanical and electromechanical systems offer an effective platform to test quantum theory and its predictions at macroscopic scales. To date, all experiments presuppose the validity of quantum mechanics, but could in principle be described by a hypothetical local statistical theory. Here we suggest a Bell test using the electromechanical Einstein-Podolski-Rosen entangled state recently generated by Palomaki et al., Science 342, 710 (2013), which would rule out any local and realistic explanation of the measured data without assuming the validity of quantum mechanics at macroscopic scales. It additionally provides a device-independent way to verify electromechanical entanglement. The parameter regime required for our scheme has been demonstrated or is within reach of current experiments.

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