Generation of quantum steering and nonlocality in a one-dimensional plasmonic waveguide

Abstract We investigate the generation of quantum steering and nonlocality in a two-qubit system mediated by a one-dimensional plasmonic waveguide, with the qubits initially prepared in the ground state. Our results show that forward-asymmetric driving fields are particularly effective in generating quantum steering, producing higher peak values and an extended temporal duration compared to symmetric or reverse-driving cases. In addition, we find that quantum nonlocality can be generated under configurations where one forward-driving and one reverse-driving field are applied with unequal strengths. We determine the distinct optimal coupling strengths for maximizing transient steerability and steady-state steerability respectively, which may be beneficial for experimental implementation. Interestingly, a comparison between different initial qubit states (the ground state and maximally entangled state) shows that initial entanglement is not necessary for achieving steady-state steering, as both states produce nearly identical outcomes.