Regular Article - Quantum Information
Quantum temporal steering in a noise channel with topological characterization
Institute of Signal Processing & Transmission, Nanjing University of Posts and Telecommunication, 210003, Nanjing, China
Accepted: 16 February 2021
Published online: 2 March 2021
We explore quantum temporal steering, measured by temporal steering robustness , in a quantum channel described by a qubit coupling to an extended anisotropic XY spin chain associated with non-trivial topological characterization. When the environment channel undergoes a topological quantum phase transition (TQPT), driven by magnetic field , we find that is remarkably depressed. Moreover, exhibits a finite-size scaling behavior in the vicinity of TQPT points. Meanwhile, by calculating the temporal steering robustness power , we can get the environment channel’s phase diagram which is exactly similar with the one obtained by topological quantity, i.e., winding number . Additionally, we also analyze the behaviors of when the environment channel is driven by other parameters (i.e., anisotropy of nearest-neighbor interaction , three-site interactions and anisotropy of three-site interactions ). The results show that approaches to zero quickly in a short time t at all the TQPT points and can also highlight these points exactly for all driving parameters.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021