Efficient quantum state transfer in spin chains via adiabatic passage

Abstract

We propose a method for quantum state transfer in spin chains using an adiabatic passage technique. Modifying even and odd nearest-neighbour couplings in time allows to achieve transfer fidelities arbitrarily close to one, without the need for a precise control of coupling strengths and timing. We study in detail transfer by adiabatic passage in a spin-1 chain governed by a generalized Heisenberg Hamiltonian. We consider optimization of the transfer process applying optimal control techniques. We discuss a realistic experimental implementation using cold atomic gases confined in deep optical lattices.

14 pages, 6 figures, to be published in New J. Phys

References in corpus (4)

• The Propagation of Quantum Information Through a Spin System
• Implementation of Spin Hamiltonians in Optical Lattices
• Quantum state transmission via a spin ladder as a robust data bus
• Phase diagram of spin-1 bosons on one-dimensional lattices

Cited by in corpus (2)

• Quantum Ratchets for Quantum Communication with Optical Superlattices
• Iterative quantum state transfer along a chain of nuclear spin qubits