IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Robustness of spin-coupling distributions for perfect quantum state transfer
Autor/es:
A. ZWICK, G. ALVARAZ, J. STOLZE, O. OSENDA
Lugar:
Zurich
Reunión:
Congreso; Quantum Information Processing and Communication 2011; 2011
Institución organizadora:
Eidgenössische Technische Hochschule Zürich - ETH Zurich
Resumen:
The transmission of quantum information between different parts of a quantum
computer is of fundamental importance. Spin chains have been proposed as
quantum channels for transferring information. Different configurations for the
spin couplings can optimize the transfer. As imperfections in these specific spincoupling
distributions can never be completely avoided, it is important to find out
which systems are optimally suited for information transfer by assessing their robustness
against imperfections. We analyze different spin coupling distributions
of spin chains designed for perfect quantum state transfer. We study the transfer
of an initial state from one end of the chain to the other end. We quantify the
robustness of different coupling distributions against perturbations and we relate
it to the properties of the energy eigenstates and eigenvalues. We find that the
localization properties of the systems play an important role for robust quantum
state transfer.
