Abstract
Quantum steering displays an inherent asymmetric property that differs from entanglement and Bell nonlocality. Besides being of fundamental interest, steering is relevant to many asymmetric quantum information tasks. Here, we propose a scheme to generate and manipulate Gaussian quantum steering between two spatially distant mechanical modes of two optomechanical cavities coupled via an optical fiber and driven by blue detuned lasers. In the unresolved sideband regime, we show, under realistic experimental conditions, that strong asymmetric steering can be generated between the two considered modes. Also, we show that one-way steering can be achieved and practically manipulated through the lasers drive powers and the temperatures of the cavities. Further, we reveal that the direction of one-way steering depends on the sign of the difference between the energies of the mechanical modes. Finally, we discuss how to access the generated steering. This work opens up new perspectives for the distribution of long-distance trust which is of great interest in secure quantum communication.
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Qars, J.E. Distributing long-distance trust in optomechanics. Eur. Phys. J. Plus 138, 1061 (2023). https://doi.org/10.1140/epjp/s13360-023-04698-4
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DOI: https://doi.org/10.1140/epjp/s13360-023-04698-4