Multiphoton Bell-type inequality: a tool to unearth nonlocality of continuous variable quantum optical systems

• URL: http://arxiv.org/abs/2008.08426v1
• Date: Wed, 19 Aug 2020 13:25:09 GMT
• Title: Multiphoton Bell-type inequality: a tool to unearth nonlocality of continuous variable quantum optical systems
• Authors: Chandan Kumar and Gaurav Saxena and Arvind
• Abstract summary: We consider a multiphoton Bell-type inequality to study nonlocality in four-mode continuous variable systems. We apply the inequality to a wide variety of states such as pure and mixed Gaussian states and non-Gaussian states.
• Score: 7.0833780140057945
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We consider a multiphoton Bell-type inequality to study nonlocality in four-mode continuous variable systems, which goes beyond two-photon states and can be applied to mixed as well as states with fluctuating photon number. We apply the inequality to a wide variety of states such as pure and mixed Gaussian states (including squeezed thermal states) and non-Gaussian states. We consider beam splitters as a model for leakage and show that the inequality is able to detect nonclassicality of noisy Gaussian states as well. Finally, we investigate nonlocality in pair-coherent states and entangled coherent states, which are prominent examples of nonclassical, non-Gaussian states.

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