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Title: Revealing Nonclassicality of Inaccessible Objects
Authors: Krisnanda, Tanjung
Zuppardo, Margherita
Paternostro, Mauro
Paterek, Tomasz
Keywords: Entanglement Dynamics
Issue Date: 2017
Source: Krisnanda, T., Zuppardo, M., Paternostro, M., & Paterek, T. (2017). Revealing Nonclassicality of Inaccessible Objects. Physical Review Letters, 119(12), 120402-.
Series/Report no.: Physical Review Letters
Abstract: Some physical objects are hardly accessible to direct experimentation. It is then desirable to infer their properties based solely on the interactions they have with systems over which we have control. In this spirit, here we introduce schemes for assessing the nonclassicality of the inaccessible objects as characterized by quantum discord. We consider two probes individually interacting with the inaccessible object but not with each other. The schemes are based on monitoring entanglement dynamics between the probes. Our method is robust and experimentally friendly, as it allows the probes and the object to be open systems and makes no assumptions about the initial state, dimensionality of involved Hilbert spaces, and details of the probe-object Hamiltonian. We apply our scheme to a membrane-in-the-middle optomechanical system, to detect system-environment correlations in open system dynamics as well as nonclassicality of the environment, and we foresee potential benefits for the inference of the nonclassical nature of gravity.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.119.120402
Rights: © 2017 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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