Non-adiabatic transformation of a spin-chain geometry via local control
Quantum Physics
2019-08-13 v1
Abstract
We consider transformation from a closed to an open spin chain and vice versa produced by changing single link strength in a pair of neighboring spins. We show that in the non-adiabatic time domain fidelity of such a process can be increased by proper choosing of the control function for spin-spin exchange coupling. We obtain this function for an antiferromagnetic quantum Ising chain and present heuristic reasons restricting possible time-dependences of Hamiltonians applied for a high-fidelity control.
Keywords
Cite
@article{arxiv.1901.01887,
title = {Non-adiabatic transformation of a spin-chain geometry via local control},
author = {P. V. Pyshkin and E. Ya. Sherman and Lian-Ao Wu},
journal= {arXiv preprint arXiv:1901.01887},
year = {2019}
}
Comments
Proceedings of 13th SSPCM International School on Theoretical Physics, Rzeszow, 2018