Unmodulated spin chains as universal quantum wires

By A. Wójcik, Tomasz Luczak, P. Kurzyński, A. Grudka, Tomasz Gdala, Malgorzata Bednarska. 2005

173 citations recorded by the source corpus.

We study a quantum state transfer between two qubits interacting with the ends of a quantum wire consisting of linearly arranged spins coupled by an excitation conserving, time-independent Hamiltonian. We show that, if we control the coupling between the source and the destination qubits and the ends of the wire, the evolution of the system can lead to an almost perfect transfer even in the case in which all nearest-neighbour couplings between the internal spins of the wire are equal.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/dac1b8958d429676b681dd2f8f7d5e8b11dfef66

Citations in the corpus

• Entanglement entropy in quantum impurity systems and systems with boundaries (2009, unknown): “As a final motivation, we note that recent models for qubit teleportation and quantum state transfer using quantum spin chains [23, 24, 25, 26, 27, 28, 29, 30, 31] employ models closely related to the quantum spin models reviewed and in many cases rely on properties of the entanglement arising from ”